中国水土保持科学
Home
About Journal
Editorial
Publication Ethics
Instruction
Subscription
Contact Us
中文
Editorial 1
Editorial 2
Editorial 3
Editorial 4
For Author
Scope for Articles
Writing Format
中国水土保持科学
Paper Search
Adv Search
2011 Vol.9 No.4
Published 2011-08-31
Articles
1
CHEN An-Jiang, ZHANG Dan, FAN Jian-Rong, LIU Gang-Cai
Relationship between gullying development stage and collapse type in Yuanmou Dry-Hot Valley area
Gully erosion and collapse fully developed in Yuanmou Dry-Hot Valley area. The development of gullying and the occurrence of collapse are interdependent and mutually promotive. Their relationships are studied based on a general survey of the gullying development stage and collapse type. Results show that gullying development process has the four stages: shallow gully stage, gully stage, gulch stage and valley stage in Yuanmou Dry-Hot Valley area. Generally, there is no collapse occurrence in shallow gully stage. The falling collapse of gully head promotes the gully head advance in gully stage. The sliding collapse of gully sidewall accelerates the gully bank extension in gulch stage. The exfoliation in the lower soil column forms the condition for the toppling collapse of soil column in valley stage when the gully is gradually razed by the collapse of soil column. By analyzing the affecting factors of gullying development and collapse occurrence, it can be concluded that the three aspects, including graded positive sedimentary cycle of lower sand and upper clay from coarse to fine in the Yuanmou Formation, the special soil body structure, and the dry-hot climate and distinct wet-dry seasons, are the basic causes of the gullying development and the occurrence of different collapse types.
2011 Vol. 9 (4): 1-6 [
Abstract
] (
1970
) [
HTML
1KB] [
PDF
1060KB] (
1926
)
7
LI Bai, Gao-Jia-Rong, Hu-Bian-Bing, Cui-Jiang, Yang-Qi-Lin, Wang-Huo
Granularity parameter of debris flow deposit in Wanghugou Gully, Beijing City
Based on field investigation and laboratory experiment, using average radius, sorting coefficient, tolerance, peak etc., partical size of Wanghugou debris flow were analyzed. Results show that the mean grain diameter in up, middle and down streams changed from large to small and then to large. The particles in whole gully had poor sorting property. In up and down stream, the skewness of the particle size tends to be more symmetrical than in middle stream. The peak values of up, middle, and down stream changed from large to small and to large again. It can be concluded if this area encounters heavy rain fall, debris flow would highly likely to happen, which will bring huge impact on daily work and life of local people.
2011 Vol. 9 (4): 7-10 [
Abstract
] (
1612
) [
HTML
1KB] [
PDF
978KB] (
1608
)
11
XIANG Mo-Li, Dai-Quan-Hou, Deng-Yi-Han, Dong-E-Hui
Quantitative evaluation on ecosystem health in small watershed in rocky desertification area
A case study were conducted in Zhulinhe small watershed in rocky desertification area. Total 15 factors were selected as evaluation indices from three aspects: resource-environment, social-economy state, and eco-comprehensive function. Evaluation index system for small watershed ecosystem was established to give health assessment. The method of high precision of standard deviation coefficient was used to calculate the weight, and grey relational analysis method was introduced to build comprehensive evaluation model for watershed ecosystem. Ecosystem health situation was evaluated quantitatively. Results showed that the watershed ecosystem was relatively stable and the health index has an increasing trend from 0.3415 in 2000 to 1 in 2008.
2011 Vol. 9 (4): 11-15 [
Abstract
] (
1466
) [
HTML
1KB] [
PDF
865KB] (
1520
)
16
ZHANG Rong-Hua, Liu-Xia, Li-Huan, Tao-Xiao-You, Wang-You-Qing, Zhang-Guang-Can
Atlas analysis on spatial-temporal changes of land use in Tongbai-Dabie mountainous area
Based on GIS spatial and temporal analysis model, geo-information atlas theory were used in this paper. Land use data were extracted from spatial data of three periods（1987, 1997, 2007）in Tongbai-Dabie mountainous area. Land use change atlas and arising/declining atlas from 1987 to 2007 were established. Land use changes characteristic were analyzed, and land use changes were predicted. Results indicate that land use changes significantly during the past 20 years. The area of farmland decreased, and forest land and construction land increased. Grassland and unused land increased firstly, then decreased,
vice verse
water land decreased firstly, then increased. From the spatial series, mutual transformation between farmland and forest land was obvious in the whole research area. Farmland and forest land transfered to construction land in the nearby of town. Waters transfered to farmland and forest land in the nearby of waters. In arising/declining atlas, the largest expanding atlas was forest land, with an increase of 5904.06km
2
, accounting for 61.31% in expanding atlas, mainly from farmland and water land. And the largest shrinking atlas was farmland, with a decrese of 6394.71km
2
, accounting for 66.41% in shrinking atlas, mainly transforming into forest land and construction land. In the future, farmland and forest land will continue to be chief land use type.
2011 Vol. 9 (4): 16-22 [
Abstract
] (
1665
) [
HTML
1KB] [
PDF
1086KB] (
1619
)
23
DAI Fu-Jiang, LIU Gang-Cai
Suitability evaluation of typical soil and water conservation measures in hilly areas of purple soil
In order to select soil and water conservation (SWC) measures appropriately, both Delphi method and fuzzy sets were used to evaluate the suitability of typical SWC measures in hilly areas of purple soil. Evaluation indices were selected based on questionnaire and two evaluation index systems were established from the point of view of requirement-supply and output-expectation respectively. The membership function was set up for each of index according to the relationship between the index and the suitability of SWC measures. Delphi method was used to determine the weights of indices and SWC suitability index was calculated by combining weighted sum with geometric mean. A case study was conducted from Qunli Village in Suining City, Sichuan Province. The results reveal that the specialists place emphasis on the benefits of soil and water conservation as well as natural environment improvement, while the local farmers pay attention to economic benefits of SWC measures. The suitability indices imply that converting cropland to grassland and to forest are more suitable for Qunli Village, in comparison with terrace and contour tillage. It is consistent with the implemented area of these four measures since 1990. The low suitability of terrace and contour tillage is attributed to the factors including lack of labor and investment and low economic benefits.
2011 Vol. 9 (4): 23-30 [
Abstract
] (
1550
) [
HTML
1KB] [
PDF
1088KB] (
1521
)
31
HU Jian-Zhong
Prediction of landscape pattern in soft sandstone area after
Hippophae rhamnoides
planting
Hippophae rhamnoides
is a kind of pioneer plant in the gully slopes in Soft Sandstone Area (SSA) for eco-economical consideration. By means of Markov model, the ratio trends of each landscape type was determined, which could support the
Hippophae rhamnoides
project. Separated from shrub type,
Hippophae rhamnoides
was listed in the landscape types together with the normal types for analysis of landscape pattern.
Hippophae rhamnoides
project influences the landscape pattern deeply in SSA. The prediction shows that the maximum ratio of
Hippophae rhamnoides
in the future should be 10.21%, and the forest percentage under 10%, which is very wise to avoid the serious death of forest including
Hippophae rhamnoides
in the arid climate and soil conditions. The steady ratio for open vegetation is 32.25%, which is a little larger but suitable in the area for matching the eco-environment.
2011 Vol. 9 (4): 31-35 [
Abstract
] (
1644
) [
HTML
1KB] [
PDF
1218KB] (
1562
)
36
YANG Hua-Min, Qin-Fei, Ma-Tie-Yuan, Liu-Jing-Yuan
Techniques of scenic forest construction at the limestone mountains in Xuzhou area
Limestone mountain is a kind of special site type with ecological characteristics. It has brought a positive effect in whole China for the construction of scenic forest at limestone mountains in Xuzhou area. The follwing techniques of scenic forest construction were summarized systematically in this paper, including the planning and design, site classification, forestation ploughing, and the arrangement of tree species and cultivation of limestone mountains scenic forest in Xuzhou area. In addition the techniques of
Platycladus orientalis
forest were also analyzed including cover growth, natural succession, forest tending and artificially promote succession. The techniques of scenic forest in this paper could be the reference in some mountain areas.
2011 Vol. 9 (4): 36-40 [
Abstract
] (
1582
) [
HTML
1KB] [
PDF
1134KB] (
1602
)
41
ZHANG Zhi-Ping, Chen-Zhi-Han, Wang-Zhi-Xiong
Development and countermeasures of soil erosion monitoring on typical watersheds of hilly gullied area in Loess Plateau
Nanxiaohegou small watershed and Yanwachuan mesoscale watershed located in Qingyang, Gansu Province. Contents and methods of past soil erosion monitoring in the two watersheds were summarized systematiclly. The main achievements were introduced, like application researches on soil and water conservation and soil erosion monitoring. The existing problems were analyzed including construction of soil erosion monitoring station (network), the performance of existing monitoring equipments and integrity of received data. It will benefit setting up the “Number-Basin” type information sharing platform of soil erosion monitoring.
2011 Vol. 9 (4): 41-45 [
Abstract
] (
1878
) [
HTML
1KB] [
PDF
1199KB] (
1616
)
46
LIU Zhi-Gang
Impacts and strategies of farmland terracing on the economic sustainable development in China
The slope farmland as an important farmland type in the hilly and mountainous area is the contradiction outcome of population and resource. Due to unreasonable utilization and reclamation for long time, slope farmland has been the main source of soil and water losses. It not only exacerbates the poverty level, but also restricts the sustainable development of economy and society. It is necessary to take practical measures to control this phenomenon. By investigating the status of slope farmland in China, the position and function of terracing project in environment construction and agriculture economic development were analyzed. In order to accelerate comprehensive management pace of slope farmland and promote economy sustainable development, the authors brought about a set of scientific suggestions on slope farmland utilization and expanding investment.
2011 Vol. 9 (4): 46-49 [
Abstract
] (
1837
) [
HTML
1KB] [
PDF
1164KB] (
1626
)
50
DIAO Hui, WANG Ze-Yi, JI Shi, Wang-Xiu-Ru, Gao-Jia-Rong, Yang-Hai-Long
Practice on course of Soil and Water Conservation Planning and Design
In order to meet the needs of practical production in our country at present and solve the problems existing in the teaching, Soil and Water Conservation Planning and Design was integrated by former Soil and Water Conservation Planning. As a key course for the students who major in Soil and Water Conservation and Desertification Combating, practice is getting more and more important in teaching. We put forward a practical training system which included eight aspects of overall planning and typical design for watershed management measures. Not only would the system reflect the overall requirement of soil and water conservation program, but also be helpful for the improvement of teaching quality and for the students to have a full knowledge of soil and water conservation planning and design.
2011 Vol. 9 (4): 50-54 [
Abstract
] (
1634
) [
HTML
1KB] [
PDF
1373KB] (
1362
)
55
WANG Ying, Gao-Jia-Rong, Lou-Hui-Pin, Gu-Lan, Jian-Bin-Tian
Application of plant materials in soil bioengineering: an example of experimental area in Changping County
In order to investigate and monitor the positive effects of soil bioengineering technology on ecological restoration of river in local areas, species like
Salix alba
var.
tristis, Amorpha fruticosa
L. and
S. matsudana
were selected as the experimental plants applied on the 40m-length artificial slope. By summarizing ecology characteristics of these species, we valued the suitability of soil bioengineering carried on the slope land. Results indicate that: under the measure of living cutting, the diameter of
S. alba
var.
tristis
and
S. matsudana
vary greatly; the average diameter at breast height（DBH）of
S. alba
var.
tristis
is 22.5% higher than that of
S. matsudana
; there is a big difference between the height of
S. alba
var.
tristis
and
A. fruticosa
L, the average DBH of
S.alba
var.
tristis
is 33.3% higher than that of
A.fruticosa
L. While under the measure of brush mattress, the average DBH of
S. alba
var.
tristis
and
A. fruticosa
L. vary significantly；the average DBH of
A. fruticosa
L. is 18.2% higher than that of
S. alba
var.
tristis
; there is no significant difference in height among these three species. Both
S. alba
var.
tristis
and
S. matsudana
show good adaptability under measures of living cutting and brush mattress, while
A. fruticosa
L. under the measure of brush mattress performs the best.
2011 Vol. 9 (4): 55-59 [
Abstract
] (
1560
) [
HTML
1KB] [
PDF
1299KB] (
1488
)
60
JIA Jing-Fang, Wang-Yu-Jie, Yan-Li-Jiang, Fan-Jun-Bei, Liu-Min
Preliminary study on the disposition patterns of soil and water conservation plants in Yulin Sand-drift Area
Yulin Sand-drift Area is one of the most significantly eroded areas on Loess Plateau in Northwest China. However, rational disposition pattern of soil and water conservation plants can effectively reduce sand storms and sediment into the Yellow River and improve the ecological environment. Four disposition patterns of soil and water conservation plants are designed according to different site conditions. The main species of plants used in these patterns include
Populus simonii, Salix psammophila, Hippophae rhamnoides, Caragana korshinskii, Sabina vulgaris
and other arbors and shrubs. The corresponding pattern for gentle dunes and interdune lowlands is to grow shrubs on the lower windward slope or to grow arbors and shrubs mixed together on every other dune. For sandy hills, pure shrubberies are for dales while mixed forests of arbor and shrub are for ridges. For river beaches and strands which are relatively flat, with small slope, farmland shelterbelts are the most suitable mode. For flood lands with saline-alkali soil, salt-resistant tree and grass species are preferred. The plants should be planted in a mixed waymixed afforestation either by line or by strip at an angle of 30°-45° to the river mainstream direction. It is hoped that this study on disposition patterns of soil and water conservation plants in Yulin Sandy-drift Areas could shed light on disposition pattern design for soil and water conservation vegetation construction of other sandy-drift area facing similar problems.
2011 Vol. 9 (4): 60-65 [
Abstract
] (
1526
) [
HTML
1KB] [
PDF
1480KB] (
1614
)
66
WANG Ping-Hua, Chen-Li-Hua, Wang-Hua-Shun, Zhou-Shuo, Ji-Xiao-Dong, Diao-Gong-Hua
De-nosing root tensile test data of
Pinus tabulaeformis
The database of single root tensile test is often confused by a series of noise because of test environment, testing machine random error, artificial operation, which greatly influences accurate analytical result. In order to improve analytical precision, the data is needed to be pretreated. The purpose of the study is to eliminate noise of root tensile test data of
Pinus tabulaeformis
with gauge length 250mm by wavelet analysis. Several multi-resolution wavelet de-nosing methods are applied, including from 3 to 31 point smoothing method, hard threshold method, fixed threshold method, mini-max threshold method and rigorous sure threshold method. Results show that among various window width of smoothing methods, 9 point smoothing method is proved to have more marked de-noising effect. In addition, the wavelet transform has particular advantage on noise elimination of the database of single root tensile test while reserving the useful information of data, thus improving the quality of test data and analytical accuracy.
2011 Vol. 9 (4): 66-71 [
Abstract
] (
1525
) [
HTML
1KB] [
PDF
1452KB] (
1557
)
72
QU Wei-Dong, CHEN Yun-Meng, WANG Lin-Lin, ZHANG Fei, ZHANG Hua-Wu
Dynamics of soil organic carbon in
Caragana microphylla
forest and its relationship with environment factors in loess hilly region
The variation rule of soil organic carbon density in the growing process of man-made forest was studied by taking
Caragana microphylla
plantation in loess hilly region as the research object with field survey and laboratory analysis. The results indicated as follows: 1) Soil organic carbon are mainly distributed in the 0-20cm soil layer，which accounted for 49% to 63% of total soil organic carbon content in 0-50cm soil layer. 2) Compared with the control, the soil organic carbon density of
C. microphylla
plantations decreased firstly, then increased，and stabilized finally over growing process. Total soil organic carbon density of
C. microphylla
plantation in age 10a，26a，40a，50a were respectively 1.555, 3.236, 2.775, 2.444kg/m
2
. The highest value was in 26a-woodland. It tent to stable over forest age. 3) Correlation analysis showed that there was a significant negative correlation between soil organic carbon content and soil bulk density, soil bulk density decreased over forest age. So it can be concluded that
C. microphylla
could improve soil organic carbon content indirectly by affecting soil characteristics. The soil organic carbon content had significant positive relation with root biomass and the content of total nitrogen, which proved that the root growth and nitrogen fixation characteristics of
C. microphylla
contributed to soil organic carbon accumulation.
2011 Vol. 9 (4): 72-77 [
Abstract
] (
1502
) [
HTML
1KB] [
PDF
1516KB] (
1638
)
78
MO Ling-Ling, Dong-Zhi, Li-Gong-Li, Liu-Zhen, Wang-Li-Yang
Effects of
Salix psammophila
checkerboard sand barrier on soil seed banks
The soil seed banks of different point positions at different locations in moving dune with
Salix psammophila
checkerboard sand barrier of seven years were studied. Results show that sand barrier could intercept plant seeds and supplement the soil sand banks. Species composition and density of the soil seed banks were different. Their descending order in horizontal distribution was the lower part, the upper part, the middle part, the top part of windward slope, and the density was 0 on leeward slope. In the vertical distribution they significantly decreased as the increase of soil depth. The declining order of the biodiversity index of the soil seed banks was the upper part, the lower part, the middle part and the top part of windward slope. Species composition of the soil seed banks is medium similarity, but high similarity in sand barrier on neighboring position and low similarity in sand barrier on spaced position. Species composition and density of the soil seed banks at different locations were different. The declining order of the spatial distribution of density along the wind ( the five points A, B, C, D and E on the diagonal from the northwest corner to the southeast corner of the
Salix psammophila
checkerboard sand barrier) and perpendicular to the wind (the north and south borders inside the
Salix psammophila
checkerboard sand barrier) was the northwest corner of the sand barrier (A), the point at the quarter of the diagonal to the northwest corner (B), the midpoint of the north border inside the sand barrier (F), the southeast corner of the sand barrier (E), the midpoint of the south border inside the sand barrier (G), the point at the quarter of the diagonal to the southeast corner (D) and the midpoint of the diagonal (C). There were two greater density parts and two smaller density parts in sand barrier. Except for richness index of Margalet on different point positions, the order of other indices was the midpoint of the south border inside the sand barrier (G)>the northwest corner of the sand barrier (A)>the point at the quarter of the diagonal to the northwest corner (B)>the midpoint of the diagonal (C)>the southeast corner of the sand barrier (E)> the point at the quarter of the diagonal to the southeast corner (D)>the midpoint of the north border inside the sand barrier (F). The similarity coefficient of floristic composition of soil seed banks of different point positions changed greatly. The study could provide theoretical basis for vegetation restoration evaluation under the condition of sand barrier.
2011 Vol. 9 (4): 78-85 [
Abstract
] (
1705
) [
HTML
1KB] [
PDF
1702KB] (
1516
)
86
CHEN Zhen, DIAO Yong, TUN Meng-Zuo, WANG Qian, TIAN Xiang-Yu, FAN Wei
Soil seed bank of
Robinia pseudoacacia
and
Quercus variabilis
with different stand ages
In hilly area in Taihang Mountains, two arbor communities,
Robinia pseudoacacia
and
Quercus variabilis
, were taken as objects to reveal the role of soil seed bank in vegetation recovery. We studied the composition and diversity characteristics of soil seed bank with different stand ages. The relationships between soil seed bank and aboveground vegetation were also analyzed. Results showed that Asteraceae and Poaceae families largely distributed in herb layer; the maximum overground species, was
Robinia pseudoacacia
(30a) coummnity family and genera, and the minimum species was
Quercus variabilis
(20a), and increasing with growing year. Perennial herb was the major life form for
Robinia pseudoacacia
(10, 20, 30a) and
Quercus variabilis
(20, 30, 40a), and the similarity coefficient of community was 0-1.0. 2)Rutaceae and Gramineae occupied large proportion in each community soil seed bank, and their soil seed bank density raised over stand age.
Robinia pseudoacacia
soil seed bank diversity increased, but
Quercus variabilis
decreased over stand age. 3)In soil seed bank, the amount of family and genera were lower than those overground with different species. Soil seed bank had seldom contribution to overgroud vegetation restoration.
2011 Vol. 9 (4): 86-93 [
Abstract
] (
1729
) [
HTML
1KB] [
PDF
1607KB] (
1603
)
94
YANG Rui, Xiao-Wei-Beng, Yu-Li-Fei
Stem sap flow of
Itea yunnanensis
at different habitats in karst region
Itea yunnanensis
at different habitats were taken as the study object in karst region. By using thermal dissipation proble (TDP) measurement method, under the same conditions such as similar crown and climatic factors which determine crown transpiration, the stem sap flow velocity of
Itea yunnanensis
was measured to reveal the rules of water variation at different habitats in karst region. By observing the fluid flow of
Itea yunnanensis
on three consecutive sunny days after rain, results revealed that the stem sap flow velocity varied consistently in one day in different habitats, stone face, gully and soil surface. Probably the peak was irregular-shaped curve, and the trend occurred that the sap flow velocity was high in daylight while low at night, and it reached climax during 10:00 to 14:00. The fluid flow velocity of
Itea yunnanensis
varied in different habitat types. The highest variation was in the stone face, followed by soil surface, gully had no obvious variation, which reflected three different water heterogeneity in karst region. The average sap flow fluid of three habitats were given as follows: stone face＞gully＞soil surface, and all increased over time with increased overall coefficient of variation. It can be concluded that water transmission capacity and water use efficiency in stone face was stronger than other habitats, and the soil surface was the weakest.
2011 Vol. 9 (4): 94-97 [
Abstract
] (
1497
) [
HTML
1KB] [
PDF
1600KB] (
1534
)
98
LIU Fa, Yang-Hai-Long, Gao-Jia-Rong, Cui-Jiang, Li-Bai
Pointpattern analysis of
Hedysarum laeve
population in Mu Us sandy land
Hedysarum laeve
is an important and widely planted sand fixation plant in north China arid region. Population pattern of this specie is studied with the method of point pattern analysis. Two 50m×50m typical sample plots with different aerieal seeding periods were selected as research sites in Mu Us sandy land, Ningxia Province. As to the analysis method, Ripley’s K function bivariate point pattern was performed to find the space correlation between the plants. The results show that: space distribution pattern of
Hedysarum laeve
depends on two factors, individual sizes and environments. Along with the increase of plant size,
Hedysarum laeve
is more likely to follow clumped distribution. The spatial association between plants will turn from negative correlation to positive correlation if their size differences are diminished. Unlike the
Hedysarum laeve
plants growing in fixed sandy land，those plants in semifixed sandy land are easier to follow clumped distribution and associate with each other positively．If
Hedysarum laeve
plants are transplanted into shifting sandy land for sand control and vegetation restoration，they ought to be arranged in the form of clumped distribution rather than regular distribution.
2011 Vol. 9 (4): 98-103 [
Abstract
] (
1696
) [
HTML
1KB] [
PDF
1550KB] (
1549
)
104
WEI Feng, HAO Meng-De
Effects of long-term fertilization on soil water and nutrient with
Triticum aestivum
L. succession in dryland of Loess Plateau
To provide reference for reasonable use of water and fertilizer resources in dry-land of Loess Plateau，the study on the change of soil nutrient and water was conducted under the condition of 22-year
Triticum aestivum
L. succession based on the long-term fertilizer experiment. The six treatments were no fertilizer (CK), nitrogen fertilizer (N), phosphate fertilizer (P), manure fertilizer (M), nitrogen and phosphate fertilizers (NP), nitrogen and phosphate fertilizers with manure (NPM). Nutrient in tilth soils (0-20cm), and water contents and water storage in soil profiles (0-300cm) were measured. The results showed that for the contents of soil organic matter, total N, total P, available N, available P, and available K in tilth soils, they increased by 55.44%, 45.24%, 29.63%, 67.16%, 186.96% and 123.65%, respectively, after long-time M application. For contents of soil organ matter, total N, total P, available N, available P, and available K in tilth soils, they increased by 65.67%, 50.00%, 40.74%, 72.37%, 324.58% and 191.17%, respectively, after long-time NPM application. The water contents in tilth soils were 18.19%, 17.99%, 17.66%, 17.42%, 16.96% and 16.29% after long-time NPM, M, P, CK, N and NP treatments, respectively. The distribution characteristics of water contents in soil profile were similar for long-time NPM, M and NP treatments. The water storage of 0-300cm soil layers were 666.73, 656.23, 629.41, 536.88, 504.26 and 488.47mm in the P, CK, N, NP, M and NPM treatments, respectively. Compared to the CK, the wate storage in the P treatment increased by 1.60%, but decreased by 4.09% in the N treatment, 18.19%in the NP treatment, 23.16% in the M treatment and 25.56% in the NPM treatment. The long-term application of single manure and chemical fertilizer combined with manure could increase nutrient and water contents in tilth soils. The water storage in 0-300cm soil layers significantly decreased by the long-term application of single manure and chemical fertilizer combined with manure.
2011 Vol. 9 (4): 104-109 [
Abstract
] (
1671
) [
HTML
1KB] [
PDF
1624KB] (
1673
)
110
TUN Ji-Na, Wang-Li-Ling, Wang-Wei-Shuai, Du-Hui-Ling
Effect of combined application of urea and paclobutrazol on soil enzyme activity under tribenuron-methyl stress
A pot experiment was conducted with three-factor completely randomized design to evaluate the dynamic effects of combined application of urea and paclobutrazol on the activity of soil urease, alkaline phosphatase and protease under tribenuron-memthyl stress. The results indicated that: different concentrations of tribenuron-methyl had inhibition-activation effects on soil urease activity, and the effects would be strengthened with increase of concentration. The activation rate on the 60th day was 2.83 times of the control. Alkaline phosphatase activity took on activation-inhibition-activation trend in low concentration of tribenuron-methyl treatment, and inhibition-activation in high concentration treatment. The activation rate on the 60th day was 2.49 times of the control. Protease activity showed activation- inhibition trend in low concentrations of tribenuron-methyl treatment,
vice verse
, inhibition-activation trend in high concentration treatment. Combined application of paclobutrazol and urea (except B1N1 treatment on protease activity) weakened the inhibition effects on soil urease, alkaline phosphatase and protease activity under tribenuron-methyl stress, and most treatments led to inhibition-activation trend. Urease and alkaline phosphatase activities were significantly higher than the control on the 60th day.
2011 Vol. 9 (4): 110-116 [
Abstract
] (
1649
) [
HTML
1KB] [
PDF
1604KB] (
1351
)
117
CHEN Lai-Gong, Ma-Mo-Li
Discussion on vegetation restoration and reconstruction in dumping site of open coal mine in Huolinhe
According to vegetation restoration practice in dumping site of open coal mine in Huolinhe in the past few decades and the field investigation and observation in recent years, as well as combining domestic and foreign reclamation achievement, we put forward a set of suitable vegetation restoration and reconstruction techniques for Huolinhe River opencast coalmine dump. This techniques cover dumping site finishing, topsoil coverage, stabilization of dumping site and management of slope, selection of plant species, establishment of planting types, and relevant technical requirements of planting and management. It will play an important role in vegetation restoration and reconstruction for open coal mine of grassland area.
2011 Vol. 9 (4): 117-120 [
Abstract
] (
1980
) [
HTML
1KB] [
PDF
1474KB] (
1613
)
