中国水土保持科学
中国水土保持科学
 
 
 
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2014 Vol.12 No.2　　Published 2014-04-30
  
 
Articles
1 ZHANG Hai-Long, QI Shi, LU Qian-Qian, YANG Bo, SUN Jia, LIU Xiao-Ying
Control zone of agricultural non-point source pollution based on water function zone in Hubei Province
Agricultural non-point source pollution has become the major factor of water quality deterioration. By identifying agricultural non-point source pollution control zones according to the environmental quality standard requirements of different water function zones of the nation and provinces, the management efficiency for controlling non-point source pollution can be improved. Taking 103 counties of Hubei Province as basic units, based on the demand of water function zones, this paper identified the environmental quality standards for surface water at county level. On this basis, the agricultural non-point source pollution type and environmental sensitivity of each county were determined by using the method of water quality pollution index and Nemoro index. Finally, the pollution control zones were determined. The results show that, 1) 29 counties are divided into Class-Ⅱ water quality protection area and 74 counties into Class-Ⅲ water quality protection area; 2) in Class-Ⅱ area, the pollution type is divided into three types, which are all single source pollution, and the environmental sensitive area was divided into three regions, namely, non-sensitive, slightly sensitive and moderately sensitive regions; 3) in Class-Ⅲ area, there are seven pollution types and main pollution types are single source pollution and mixed pollution, and the environmentally sensitive area includes three regions, namely, slightly, moderately and seriously sensitive regions; 4) the pollution control zone is divided into three classes: the first class includes two regions, the second class includes six regions and the third class includes 23 regions. Our results can contribute to providing a basis for pollution management and prevention in Hubei Province.
2014 Vol. 12 (2): 1-8 [Abstract] ( 364 ) [HTML 1KB] [PDF 2108KB] ( 820 )
9 XU Hua-Sen, BI Hua-Xing, GAO Lu-Bo, LIAO Wen-Chao, CHEN Jun-Gang, YUN Lei, BAO Biao, YANG Zong-Ru
Microclimate and its effects on crop productivity in the Malus pumila and Glycine max intercropping systems on the Loess Plateau of West Shanxi Province
The objective of this study was to evaluate ecological and economic benefits of the fruit trees and crops intercropping system, and to provide guidance for selection of intercropping species and cropping spacing in the agroforestry systems. Three-year-old Malus pumila and Glycine max intercropping system (T1), 5-year-old M. pumila and G. max intercropping system (T2), 7-year-old M. pumila and G. max intercropping system (T3), and G. max monoculture system (CK) in Jixian County of Shanxi Province were chosen as experiment objects. Photosynthetically active radiation (PAR), temperature, topsoil temperature, aerial relative humidity and the productivity of G. max were quantified, and the comprehensive effect of microclimate in the intercropping systems was evaluated by grey correlation analysis based on setting root barriers. Compared with the G. max monoculture system, the intercropping systems reduced PAR, air temperature and topsoil temperature by 30.3% - 59.0% , 5.9% - 17.9% and 14.6% - 42.7% , respectively, and increased the aerial relative humidity by 7.0% - 17.9% . The correlation coefficients of microclimate between the intercropping systems and the monoculture system gradually decreased with the increase of the age of M. pumila. The interrelations of aerial relative humidity and PAR were lower than that of other microclimate factors. Biomass of root, stem and leaf, and yield of intercropped G. max were lower than those of sole G. max. The effects of intercepted light, dropped temperature and increased humidity, as well as the comprehensive effect of microclimate of the intercropping systems became more evident with the aging of M. pumila, but the microclimate of all intercropping systems could result in the decrease of productivity of intercropped G. max.
2014 Vol. 12 (2): 9-15 [Abstract] ( 548 ) [HTML 1KB] [PDF 880KB] ( 766 )
16 ZHU Nan, WANG Bin, WANG Yun-Qi, SUN Su-Qi, Wu Chao, LIU Li-Zi-Yuan
Soil respiration characteristics and its relationship with environmental factors of four typical forests in Jinyun Mountain, Chongqing
Soil respiration rates of four typical forest types including evergreen broadleaf forest, bamboo forest, mixed forest and coniferous forest were observed by LI-8100 soil carbon flux measurement system in Jinyun Mountain Nature Reserve of Chongqing during the growing season in 2012 (April to August). Meanwhile, soil temperature and soil moisture, soil pH at 5 and 10 cm depth were measured. Temporal variation of soil respiration rate of the four typical forests and the related environmental factors were analyzed. Results showed that: 1) Diurnal soil respiration rate of four typical forest types were different, the ranges of diurnal soil respiration rate for the mixed forest and coniferous forest in May and July were higher than that of evergreen broadleaf forest and bamboo forest. 2) The monthly soil respiration rate changed regularly, increasing from April to July and decreasing from July to August. 3)At 5 cm and 10 cm soil depth, soil respiration rate had an exponential relationship with soil temperature, and temperature sensibility of evergreen broadleaf forest (5 cm Q10 = 2.054, 10 cm Q10 = 2.117) was higher than others. 4) There was no significant correlation between soil respiration rate and soil moisture in the evergreen broadleaf forest, and the other three types of forests showed a quadratic relationship. 5) For the evergreen broadleaf forest, soil respiration rate and pH showed a significant correlation at 5 cm and 10 cm depth, and bamboo forest only presented a significant correlation at 5 cm depth. There was no significant correlation in the other two types of forests.
2014 Vol. 12 (2): 16-23 [Abstract] ( 460 ) [HTML 1KB] [PDF 882KB] ( 697 )
24 FAN Deng-Xing, YU Xin-Xiao, JIA Guo-Dong, WANG He-Nian
Characteristics of soil and water loss and its influencing factors on slope scale in rocky mountain area of Beijing
In order to reveal the regular pattern of water and soil losses in different regions,the partial correlation relationship between soil erosion and its main influencing factors including rainfall,vegetation coverage and slope was discussed based on observation data of runoff plots in rocky mountain area of Beijing. The results showed that runoff was mainly affected by rainfall and maximum 30 min rainfall intensity; erosion was highly influenced by runoff, vegetation coverage and maximum 30 min rainfall intensity. For rainfall factors,runoff was highly influenced by rainfall,rainfall duration and maximum 30 min rainfall intensity,and erosion,however,was highly affected by maximum 30 min rainfall intensity. The result showed a significantly negative correlation between soil erosion and vegetation cover,that is,the annual runoff and erosion in the runoff plots decreased as vegetation coverage increased. The annual runoff and erosion in the runoff plots firstly increased,and then decreased with increasing slope gradients. Shrub and grass have obvious soil and water conservation effects. Development of vegetation restoration has important implications for improving the ecological environment and controlling soil erosion in rocky mountain area of Beijing.
2014 Vol. 12 (2): 24-28 [Abstract] ( 503 ) [HTML 1KB] [PDF 796KB] ( 757 )
29 LIU Shun-Sheng, HU Xu-Li, YUAN Li, SU Dan, WANG Yan-Ping, ZHANG Guang-Can, LIU Xia
Impact of human disturbance on community structure and hydrological functions of Quercus acutissima forest in Yimeng Mountain area
In order to explore the change of community structure and hydrological functions of Quercus acutissima forest at different human disturbance levels, three typical Q. acutissima forests under enclosure, grazing and overcutting, grazing- and overcutting-forbidden measures were studied. The results are as follows. 1) Grazing and overcutting directly lead to the significant degradation of community structure and weakening of hydrological functions. Compared to the enclosure measure, grazing and overcutting measures lead to a great reduction of community coverage by 83.0% , and decrease the community diversity and community evenness by 88.7% and 85.1% respectively. The hydrological functions of forest in terms of total soil porosity, stable infiltration coefficients, and water-holding capacity of litter, are also significantly reduced by 44.2% , 76.7% and 43.7% , respectively. 2 ) On the contrary, grazing- and overcutting-forbidden measure is favorable to the recovery of community structure and hydrological functions. Compared to grazing and overcutting, some indexes such as community coverage, diversity, evenness, total soil porosity, stable infiltration coefficients, and water-holding capacity of litter are increased by 520% , 613% , 532% , 30.3% , 103.7% and 28.0% respectively. 3) Hydrological function indexes are well correlated linearly with community coverage index. The higher the community coverage, the better the hydrological functions. Community coverage can serve as an important index of forest structure and functional degradation or restoration.
2014 Vol. 12 (2): 29-34 [Abstract] ( 506 ) [HTML 1KB] [PDF 833KB] ( 847 )
35 QIAN Bin-Tian, SHI Lei, GAO Jia-Rong, HAN Yu, WANG Yue, GU Lan, KANG Ye, WANG Xi
Application of Tamarix chinensis Lour. in riparian ecological restoration: A case study of Huangshui River in Xining City

The objectives of this study were to further understand the application of Tamarix chinensis Lour. in the restoration of riparian ecology, and screen plant materials suitable for the riparian ecological restoration in the northwestern areas of China. A section of bare bank slope of Huangshui River between Haihu Bridge and Xinning Bridge of Xining City was chosen as study area. According to the situation of splash erosion, surface erosion and gully erosion in this area, live branch cuttings of T. chinensis were applied for close-to-nature restoration of bare slope. The survival rate, coverage and growth conditions of T. chinensis 6 months, 15 months and 51 months after application were investigated, and the ambient micro-climate and biodiversity were monitored. The results showed that growth of T. chinensis 51 months after application reached a high level with the survival rate and coverage of 88% and 100% , and the average basal diameter and average plant height reached 3.19 cm and 348.9 cm, respectively. Thanks to immobilization of T. chinensis roots to slope soils, and ambient vegetation recovered rapidly, and biodiversity increased significantly. The surrounding micro-climate was improved: the temperature of the test area was 63.4% lower and air humidity 62.8% higher than that of surrounding bare land. Some problems in the application of T. chinensis in river bank restoration are summarized and some recommendations made.
2014 Vol. 12 (2): 35-39 [Abstract] ( 405 ) [HTML 1KB] [PDF 807KB] ( 856 )
40 WANG Guan-Qi, ZHANG Ke-Bin, WANG Zhi-Shu
Desert grassland ecosystem health evaluation under different fenced enclosure conditions
In order to quantitatively assess the influence of fenced enclosure on the grassland ecosystem health, this paper took the Liuyangpu enclosure region of Yanchi County, Ningxia, as research area, using ecosystem health index to evaluate desert grassland under different fenced enclosure conditions. The results are as follow. 1) From the perspective of enclosure time, long-time fencing is not conducive to the vegetation recovery. 2) From the viewpoint of stocking pressure, during the early enclosure time, grazing is not beneficial to the recovery of grassland ecosystem health; after certain years, moderate grazing benefits the recovery of grassland ecosystem health. Therefore, in the research of the recovery of desert grassland, it is necessary to adjust the enclosure time and moderate grazing. It may not only obtain certain economic benefits, but also promote the recovery of grassland ecosystem health.
2014 Vol. 12 (2): 40-46 [Abstract] ( 303 ) [HTML 1KB] [PDF 850KB] ( 718 )
47 ZHONG Yi-Jun, WU Lin, HUANG Qian-Ru, LIAO Mian-Qing, YE Chuan, CHENG Yan-Hong, SUN Yong-Ming, ZHANG Xin-Liang, XIONG Chun-Gui
Effects of planting pattern on soil moisture and drought resistance ability in red soil
The effects of different planting patterns on soil moisture and soil drought resistance ability of red soil were studied by runoff plot experiment. The results indicated that, 1) compared with planting Arachis hypogaea, soil organic matter, field capacity, total porosity of the soil when planting Boehmeria sp. were increased by 28.44% , 10.06% , and 5.65% , while soil bulk density was reduced by 7.20% ; 2) the soil moisture variation coefficient of every soil layer and the 0 - 100 cm soil where A. hypogaea was planted was generally higher than that planted with Boehmeria in the whole monitoring period, while the temporal and spatial stability of soil moisture when planting Boehmeria sp. was better than planting A. hypogaea; 3) compared with planting A. hypogaea, the 0 - 40 cm soil with Boehmeria sp. planted can prolong drought resistance time by more than 7 days; however, as the soil layer deepens, the difference tends to be unremarkable; 4) planting Boehmeria sp. can improve drought resistance ability of red soil, especially for the middle and upper layers. From the viewpoint of use of soil water, planting Boehmeria sp. outperforms planting A. hypogaea in red soil, which provides the basis for using deep water in red soil regions.
2014 Vol. 12 (2): 47-51 [Abstract] ( 503 ) [HTML 1KB] [PDF 801KB] ( 844 )
52 HOU Li-Zhu, LIU Jiang-Tao, LV Jian-Hua
Characteristics of subsurface flow in porous pavement
Impervious surfaces have since a long time been held responsible for the destruction of watershed integrity in urban and urbanizing areas as cites are being covered by airtight concrete surfaces like roads and buildings. In order to improve surface infiltration capacity, it is necessary to transform hardened grounds like sidewalks, bicycle tracks, leisure squares and courtyards to porous pavements. For studying the runoff characteristics of porous pavements, a series of simulated rainfall experiments under different rainfall intensities (31.38,42.32,50.60,58.88,69.82, and 78.09 mm/h) were conducted. The runoff generation process and the percentages of the subsurface runoff as part of the total precipitation are discussed in this paper. The results show that subsurface flow is the dominant runoff generation process. The percentages of the subsurface runoff vary with different rainfall intensities. Under the same pavement type, the ratio of the subsurface runoff to the total precipitation increases with an increase in the rainfall intensity. The infiltration capacity of the underlying surface of a city will be improved by increasing the proportion of permeable bricks and porous concrete block with a lower sand proportion.
2014 Vol. 12 (2): 52-58 [Abstract] ( 426 ) [HTML 1KB] [PDF 854KB] ( 766 )
65 LIN Xian-Biao, YAN Yan-Yan, MIN Qing-Wen, TANG Hui-Ping, ZHENG Jiang-Min, ZHANG Yong-Xun, WANG Wei-Qi
Anempirical analysis of Jasminum sambac famers' willing to accept eco-compensation value and related influencing factors in Fuzhou
This study aims to confirm Jasminum sambac farmers' willingness to accept (WTA) eco-compensation value and the main influencing factors by using the multinomial logistic regression. Taking Jasminum sambac farmers in Fuzhou as respondents, we applied contingent valuation method (CVM) to measure the farmers' WTA eco-compensation value in 2013. Data analysis revealed that the lower limit, upper limit and average value were 23 868.84, 30 723.60 and 27 296.22 yuan/ (hm2·a), respectively. Logistic regression model analysis showed that the most important factor affecting the farmers' WTA eco-compensation value is non-agricultural income. The age and educational level of famers and their awareness of the level of production reduction of organic Jasminum sambac can be considered as important influencing factors on farmers' WTA eco-compensation value, while other factors had no significant effect on it. In addition, in order to maintain the ecological environment of the Jasminum sambac planting, guarantee the quality of agricultural products and improve the international competitiveness of agricultural products, government should act as the leading role by establishing and intensifying a long-term mechanism of agro-ecological compensation. This would further perfect the agro-ecological economic compensation mechanism of Jasminum sambac industry in Fuzhou for a cultural heritage protection.
2014 Vol. 12 (2): 65-71 [Abstract] ( 374 ) [HTML 1KB] [PDF 951KB] ( 787 )
59 YANG Xi-Tian, XUE Shuai-Zheng, WANG Xiang-Yang, WU Ming-Zuo, YAN Dong-Feng
Responses of root development after transplanting of seed-base and container seedlings of Platycladus orientalis under different water stresses
The water stress happening in seedling period is a key factor inhibiting the revegetation in arid regions. In order to explore the responses of different stoke types to water stress, we transplanted seed-base seedling (SS) and container seedling (CS) of Platycladus orientalis in water controlled condition. Soil water was controlled at three levels: well watered (WW), mild water stress (MWS) and severe water stress (SWS). The results showed that SS of P. orientalis had greater taproot length, root length and root surface area, but smaller number of root tips and first order lateral roots than CS. Taproot length increased with the water stress getting more severe; however, total root length decreased rapidly. For both SS and CS, their diameter at ground level and root biomass decreased as the water stress intensified, but the root-to-shoot ratio of SS increased. These results may indicate that SS outperforms CS after transplantation under water stress condition.
2014 Vol. 12 (2): 59-64 [Abstract] ( 421 ) [HTML 1KB] [PDF 867KB] ( 830 )
72 XIAO Hui-Jie, YU Xin-Xiao, JIA Rui-Yan, ZHANG Feng, LI Yi-Tao
Water consumption of typical artificial forests in Beijing mountainous area

In North China, how to properly deal with the relationship between vegetation and water resources is one of the key problems for the forest vegetation construction. Hence, how to construct forest vegetation with high moisture stability based on the water bearing capacity is important. Taking Platycladus orientalis and Pinus tabulaeformis, two typical artificial forests as the research object, we measured the water consumed by individual trees with lysimeter installed in Miaofeng Mountain, Beijing. On the basis of the measured data, water consumption by forest stands was revealed. We found that in sunny days diurnal variation of transpiration intensity of two kinds of individual trees appeared as a single peak curve. However, in cloudy or rainy days the transpiration rate varied significantly between the two species. Correlation analysis showed that among environmental factors, solar radiation flux, vapor pressure deficit, air temperature, soil water content and soil water potential were positively correlated with transpiration intensity, while the relative humidity was negatively correlated with transpiration intensity. By using tree sapwood area as transform scalar, based on the measured transpiration rate of sample trees, the transpiration quantity of forest stand was calculated. From June to September, transpiration by the forest stand of Pinus tabulaeformis was 321.43 mm and that of Platycladus orientalis 192.83 mm.
2014 Vol. 12 (2): 72-77 [Abstract] ( 507 ) [HTML 1KB] [PDF 847KB] ( 801 )
78 ZHANG Yan-Juan, XU Xiang-Zhou
Benefit assessment and promotion measures of urban rainfall harvesting: A case study of a car-washing device using rainwater in the campus
To quantitatively calculate the amount of subsidy is very important for the government, since cash incentive is an effective method to promote rainwater collection. In this study, we investigated the volume of collected water from the roof in different rainfall conditions and the amount of consumed water to wash cars in the representative climatic situations through field tests. Then we assessed the cost and benefit of the project. The calculation results show that the project could offer such a low net income ratio as to be encouraged and supported by the government although the ecological and social benefit was obvious. The average net benefit rate in 10 years was lower than those of other water conservancy projects, for it was only 7.05 % , and was so far as to 3% as the inflation rate 4% was subtracted. Combining with socio-economic development status in Dalian, this paper also presents several incentive measures, in which the amount of cash subsidy is counted according to the quantitatively calculated eco-benefit. Compared to other means, the method mentioned above is more reasonable.
2014 Vol. 12 (2): 78-83 [Abstract] ( 470 ) [HTML 1KB] [PDF 820KB] ( 769 )
84 JIA Jian-Bo, HUANG Hao-Feng, ZOU Da-Lin, NAN Hai-Long, ZHU Jian-Gang, LI Hai-Guang
Influence of heavy rainstorms on highway slope protection and countermeasures
We investigated 26 road slopes and slide fields in order to solve the highway road slope landslide problem in heavy rainstorms at Beijing-Chengde Expressway during 2011 and 2012. At the same time, we clarified the mechanisms of the landslide. The results showed that there were seven problems which caused road slope landslide, including slope vegetation layer landslide, six-arris floriation revetment washing out, slope collapse, slope slide and so on. Based on the analysis, we propose some countermeasures and suggestions, including improving the slope to drainage system in vivo and in vitro, avoiding large areas of confluence, reinforcing layers and slope by the net green vegetation and so on, for road slope protection. This paper would provide theoretical basis and reference for future road slope protection designs and emergency treatment for the landslide under storms.
2014 Vol. 12 (2): 84-86 [Abstract] ( 454 ) [HTML 1KB] [PDF 2025KB] ( 861 )
87 ZHOU Ming-Tao, HU Huan
Effect of freeze-thaw action on vegetation-growing concrete shear strength
In order to explore the effect of freeze-thaw action on the shear strength of vegetation-growing concrete, we took cold-end temperature, water content and thawing temperature as influencing factors to monitor cohesives and internal friction angles of initial and frost-thaw samples by quick shear test. The results showed that after a process of frost-heave and thaw-settlement, vegetation-growing concrete cohesive reduced, but its internal friction angle increased in most cases. The coupling effect of cohesive and internal friction angle indicated that vegetation-growing concrete shear strength decreased. As the cold-end temperature dropped, vegetation-growing concrete cohesive decreased and its internal friction angle increased gradually after the process of frost-thaw. The moisture content had a dual effect on the cohesive and internal friction angle of vegetation-growing concrete. With the increase of moisture content, the cohesive decreased rapidly at first and then decreased slowly to a stable value finally, but the internal friction angle kept declining all the time. The change of thawing temperature had no effects on the changes of cohesive and internal friction angle except on the thaw-settlement time of vegetation-growing concrete.
2014 Vol. 12 (2): 87-91 [Abstract] ( 459 ) [HTML 1KB] [PDF 820KB] ( 701 )
92 LIU Yu
Spatial distribution assessment of the soil conservation capacity of land cover pattern in catchments dominated by rainfall-triggered erosion
Taking upper Han River basin as case region, the soil conservation capacity of land cover pattern was assessed. Two indictors integrating fraction of vegetation cover ( fc ) and slope (S) were developed and applied in the assessment. One indicator is the spatial distribution pattern of upper effective catchment area weighted by fc and S, and the other is the spatial distribution pattern of the coupling of driven force and resistance relevant to soil erosion. The efficiency of the two indicators was tested using the sediment delivery data of 14 gauged stations in the study area. The results imply that the adjacent sub-watersheds of the river trunk are the main direct source areas of sediment. This situation can be attributed to the low soil conservation capacity of land cover pattern resulted from the low vegetation cover and short flow path length to the river trunks. The two indicators are confirmed effective to indicate the sediment yield at watershed level, and reliable tools for evaluating soil conservation capacity of a given land cover pattern. The approach developed in this study is based on the mechanism of the interaction between land cover pattern and soil erosion, and highly feasible. It provides an easy-to-use avenue for assessing the soil conservation capacity, and the impacts of land cover pattern change on soil erosion.
2014 Vol. 12 (2): 92-98 [Abstract] ( 507 ) [HTML 1KB] [PDF 1772KB] ( 803 )
99 FAN Yan-Li, NIE Hua
Analysis of degree of water contribution to industry and benefits of ecological water in Shanxi Province
The analysis of the degree of water contribution to industry and benefits of ecological water can provide reference for the rational allocation of water resources. Firstly the water utilization in Shanxi Province was analyzed in this paper, its contribution to GDP was calculated based on improved C-D model. The contribution was about - 1.3% , in which the primary, secondary and tertiary industries, contributed 2.11% , 0.50% and - 1.56% separately. Secondly, the benefits of ecological water in Shanxi were analyzed from the perspective of forest ecosystems. It was calculated that the service function value of forest ecosystems in 2003 and 2010 was 97.408 billion and 100.021 billion yuan, and the corresponding water consumption is 310 million and 340 million m3 . Aimed at the pollution and waste problems in production and ecological water allocation in Shanxi Province, countermeasures such as water saving, water pollution control and prevention, ecological water protection etc. are put forward.
2014 Vol. 12 (2): 99-104 [Abstract] ( 478 ) [HTML 1KB] [PDF 799KB] ( 864 )
105 CHEN Wei, MENG Meng, LI Jiang, QIU Qiong, PEI Yan-Hui, GUO Yong-Qing, FENG Xuan, YANG Bin
Soil organic carbon pool characteristics of Pinus kesiya var. langbianensis plantation
In Simao district of Pu’er City of Yunnan Province, we chose a series of plantations involving eight different planting densities and seven stand ages as the research objects. Through measuring the soil organic carbon contents and carbon densities (0-50cm depth), the effects of Pinus kesiya var. langbianensis planting on soil organic carbon (SOC) were investigated and analyzed. The results were as follows: 1) The SOC contents of P. kesiya var. langbianensis plantations decreased with the soil depth. Under all the eight planting densities, in the stand age of 13 years, the SOC contents (0 - 50 cm depth) were higher than those of natural P. kesiya var. langbianensis forest. As far as the ages of plantations were concerned, from the 4th year to the 10th year after planting, the contents of SOC were in a declining stage, and began to increase since the 12th year. 2) Vertically, the dissolved organic carbon (DOC) decreased with the increase of soil depth, and the accumulated spatial distribution of microbial biomass carbon (MBC) was at the layer of 0 -10 cm. 3) The SOC densities of eight involved planting densities ranged from 64.48 t/hm2 to 84.30 t/hm2,among which, the SOC density of the planting density of 2m×4m was the highest, where as that of 1 m ×1 m was the lowest. The values of DOC density and MBC density ranged from 0.30 to 0.42 t / hm2 and from 0.49 to 1.29 t / hm2 , respectively. Both SOC density and DOC density of studied plantations from 4 years old to 14 years old showed the characteristics of decreasing and then increasing as the planting age increased. The SOC density and DOC density of 14 years old plantation were 92.14 and 0.42 t / hm2 , respectively, and the peak value of MBC density occurred at the plantation of 10 years old, which was 0.92 t /hm2 . The results of this study verified that P. kesiya var. langbianensis plantation has promising ability of carbon storage.
2014 Vol. 12 (2): 105-112 [Abstract] ( 421 ) [HTML 1KB] [PDF 879KB] ( 761 )
113 KANG Yong-Hui, XIE Jian-Cang, HUANG Wei-Jun, ZHOU Zu-Hao
Fuzzy comprehensive evaluation of agricultural drought vulnerability
Studies show that the higher vulnerability degree of hazard-bearing body, the heavier the severity of drought, in the case of the same hazard factor; therefore, it is of great importance that the evaluation index and assessment model be selected scientifically and reasonably so that the drought vulnerability can be assessed objectively and truly. According to the mechanism of agricultural drought vulnerability, this study selected the agricultural drought vulnerability index under comprehensive consideration from the natural, social and economic aspects, established the agricultural drought vulnerability evaluation index system, taking Baise city area of Guangxi as an example. We analyzed and evaluated the agricultural drought vulnerability degree using fuzzy comprehensive evaluation method based on entropy, and obtained the comprehensive assessment results based on the principle of maximum membership degree. The results show that the agricultural drought vulnerability degree of Baise city area is serious, which is the combined effects of the laggard economic level, harsh natural environment and social factors of Baise. The results of agricultural drought vulnerability degree evaluation could provide reference for local governments to take targeted countermeasures to effectively relieve or reduce the agricultural drought vulnerability degree.
2014 Vol. 12 (2): 113-120 [Abstract] ( 349 ) [HTML 1KB] [PDF 848KB] ( 756 )
中国水土保持科学
　
Notice on the Recruitment of Youth Editorial Board Members for the Journal of SSWC
Theme on Spreading Spirits of Great Scientists: LIANG Xi, the Founder of Forestry Education in China
ZHENG Fenli, CHEN Liding and LEI Tingwu in the list of Highly Cited Chinese Researchers by Elsevier
SSWC Indexed in the 2020 edition of “A Guide to the Core Journals of China”
Science of Soil and Water Conservation Accepted for Inclusion in Scopus
2020 Editor-in-Chief Meeting of Science of Soil and Water Conservation Held in Beijing, Concurrently
SSWC Selected to Be in Core Library of Source Journals of CSCD during 2019-2020
SSWC Indexed in the 2017 edition of “A Guide to the Core Journals of China”
Appreciation for peer reviewer of SSWC Editorial Board
2017 Editor-in-Chief Meeting of Science of Soil and Water Conservation Held in the Yangling of Shaan
Professor Wang Lixian, Former Editor-in-Chief of SSWC Won Norman Hudson Memory Award
Calls for Papers in English
Deputy Editor-in-Chief Cui Peng Elected as a Member of 9th National Committee of CAST
Three Members of SSWC Editorial Board Rewarded as NOSTW in 7th Session Assessment
Election of 4th Editorial Board and First Meeting of New Board Held in Beijing
Deputy Editor-in-Chief of SSWC, Academician Cui Peng elected as a member of the IRDR SC
Notice About The 5 Not-Allowed Rules While Publishing Academic Articles by 7 Organizations
SSWC Indexed in “A Guide to the Core Journals of China”
Science of Soil and Water Conservation Calls for Papers
SSWC Selected to Be in Core Library of Source Journals of Chinese Science Citation Database During
On the Home Page of the Journal Science of Soil and Water Conservation
Five Papers of Science of Soil and Water Conservation Determined as Excellent in 5th Assessment
Congratulations to Deputy Editor-in-Chief Cui Peng Elected as Academician of Chinese Academy of Scie
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