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2006 Vol.4 No.2
Published 2006-04-30
Articles
1
LI Zhi-An-；Liu-Bing-Zheng
Calculation on soil erosion amount of main river basin in China
In order to evaluate soil erosion condition in China,the soil erosion amount should to be calculated.Based on the existing research,the sediment investigation and soil erosion controlling data are collected.With methods of sediment delivery ratio(SDR) and soil conservation,the annual average soil erosion amount of Yellow river basin and Yangtze river basin etc.9 large rivers basins are calculated,which is 5.31 billion tons.The results are compared with relative researches,and differences of sediment delivery ratio among basin regionalization are discussed.Which shows that the gross amount of soil erosion of Yangtze river basin is the largest,Yellow river basin are less than Yangtze river basin,then the turn is Huaihe river basin,Pearl river basin,Liaohe river basin,Songhuajiang river basin,the Minjiang river basin and the Qiantang river basin are the least.
2006 Vol. 4 (2): 1-6 [
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7
YANG Hong-Xiao-；Lei-Qi-；Tun-Bei-；Zhang-Jin-Tun-；Sun-De-Fu
Ecological restoration in alpine sandy lands of Gonghe basin,Qinghai province
Effects of ecological restoration in alpine sandy lands was studied at Huangshatou,Qinghai Province,where land desertification was heavy and whose sandy lands were representative on Qinghai-Tibet Plateau.The results showed that enclosure,inter-dune planting,and sand barriers were able to facilitate the process of revegetation or vegetation restoration,characterized by the enhancement of vegetation cover,cover of indicator or dominant species indicating late stage of succession,and species richness of perennial grass;Because the process of plant establishment was prevent by drifting sand from uncontrolled sandy land at the edge of controlled sandy land,vegetation restoration were slower there than in the core part.For the sake of better rehabilitation,an improvement was recommended therefore on how to control sandy lands.Even if the negative "edge effects" occurring in the process of vegetation restoration could hardly be removed thoroughly,they may be weakened and confined to some extent through enlarging the area of controlled sandy land.If so,the area proportion of core part to edge would be enhanced,and then more lands would be given the chances to restore their vegetation.
2006 Vol. 4 (2): 7-12 [
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1581
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13
LI Yong-Gui-；Liu-Da-Gen-；Liu-Zhen-Guo-；Han-Fu-Gui
Soil and water conservation and water source protection in areas around Miyun reservoir
According to natural geographic characteristics and social economic conditions of the areas around Miyun reservoir,especially the circumstances of water level declined rapidly and large area of bare land occurring due to continuously drought,whose key contradictions are analyzed,which include populations,resources and environment,and the problems existing in the ecological environment of the vicinity of the Reservoir.The thoughts and measures of soil and water conservation and water source protection are probed into,and the general ideas and principals of ecological construction are put forward.Three measures are introduced,which include bare land treatment and protection in northern area of Reservoir,bare flooding land treatment and protection at entrance of Reservoir, and small scattered point source pollution treatment.At last,the management measures and policy on enforcing soil and water conservation and water source protection around Miyun reservoir are brought forward.
2006 Vol. 4 (2): 13-17 [
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18
SHI Wan-Li-；Yang-Qi-Ke-；Mu-Wan-Gong
Applicability test of CLIGEN in Loess Plateau
CLIGEN is a stochastic climate generator,based on the daily observed values of rainfall,the maximum and minimum temperature and average wind velocity from 1986 to 2003 at comprehensive experimental station of soil and water conservation in Ansai and other climate factors gained by corresponding station all over the American,whose applicability in Loess Plateau is tested.It is important to run and prove the applicability of water erosion forecast model WEPP in Loess Plaueau.The results showed that the single climate factor can be simulated preferably by CLIGEN if neglecting the relation within climate factors.Annual precipitation and its monthly distribution and monthly distribution of daily maximum and minimum temperature can be simulated accurately,however,monthly average value and standard deviation of simulating value of wind velocity is generally higher that of observed values.The monthly average simulated value of probability between precipitation and non-precipitation is lower than that of observed value,it is the same to which between non-precipitation,and precipitation.Therefore,the climate factors should be analyzed synthetically in selecting experimental stations.
2006 Vol. 4 (2): 18-23 [
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1446
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24
YANG Yong-Hui-；Diao-Shi-Wei-；Liu-Na-Na-；Tun-Jin-Shui-；Su-Jing-；Xu-Ji
Soil moisture characteristics of different vegetation measures in loess hilly region of southern Ningxia
In order to illustrate the relation between artificial vegetation and soil moisture characteristics in loess hilly region of Ningxia,the centrifugation method and invariable water height method were used for measuring the curve of soil moisture characteristics and saturated hydraulic conductivity of soil,and the soil moisture characteristics of sloping land in loess hilly region of southern Ningxia were studied.The results showed that there was high power function correlation between the soil moisture and the potential of soil water.The mathematical model was
θ
=
aS
b
.The value a and different sloping land were ranged in order from higher ones to lower ones as follow: Medicago lupulina,
Hippophae rhamnoides
,Natural Grassland,Prunus armeniaca,Caragana korshinskii,farmland.Grassland,Shrubbery,Arbor Forest,cropland.Saturated hydraulic conductivity of Natural Grassland and Medicago lupulina were the highest than the others,and cropland was the lowest,and Grassland,
Hippophae rhamnoides
and Caragana korshinskii were middle.At the same soil water potential range,soil water content of Medicago lupulina was highest,
Hippophae rhamnoides
took second place,cropland was the lowest and others' were around the same.At the low potential range,the average soil water content,from high to low,was Medicago lupulina,Natural Grassland,Cropland,Natural Grassland,Prunus armeniaca,Caragana korshinskii.At the middling soil potential range,the order of average soil water content was Medicago lupulina > Natural Grassland > Prunus armeniaca,and with the soil suction increasing,soil water content changed little.Languishing soil water content of vegetations except Medicago lupulina was still highest,and cropland kept was lowest.
2006 Vol. 4 (2): 24-28 [
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1464
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29
XIN Ying-；Diao-Yu-Sen-；Bo-Bao-Yuan
Influence of
Larix gmelinii
Plantations at Eastern Mountainous Region in Heilongjiang Province on Water Quality
In order to know the influence of
Larix gmelinii
Plantations at eastern mountainous region in Heilongjiang province on the water quality,the water quality indexes in precipitation,throughfall,stemflow and runoff has been studied through the apparatus of water quality monitor and the method of atom absorb.Which include pH,DO,TURB,COND,ORP,K,Na,Ca,Mg,Cu,Zn,Mn and Fe etc..The results show that the value of pH varies unconspicuously in the precipitation, throughfall,stemflow and runoff,and the variance coefficient is lower.After precipitation passing through
Larix gmelinii
Plantations,the DO reduce gradually,the TURB and COND increase obviously.The ORP reduce gradually.The total average concentration of Na,Ca and Mg increase gradually.The net eluviation amount of K and Ca is higher than other elements of throughfall and stemflow.The net eluviation amount and eluviation coefficient of every element in stemflow is higher than that of throughfall.The runoff has the catabatic effect to acidification of water quality.
2006 Vol. 4 (2): 29-33 [
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1411
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1307
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34
JIAO Hai-Long-；Liu-Xiao-Jing-；Li-Wei-Jiang-；Huang-Wei
Effects of straw deep mulching on soil moisture infiltration and evaporation
In order to probe into the effects of straw return to water infiltration and evaporation,simulation experiment of straw deep mulching on soil columns were studied.The experiments are to put a straw layer of 3cm thick under the soil surface of 20cm.The results indicate that infiltration speed of surface soil water have been reduced in the process of soil water infiltration after irrigation and raining.The soil water under straw layer can't divert to the surface layer through capillary action in the process of soil moisture evaporation,so the water that pass through the straw layer has been difficultly evaporated out of the soil.The losing water by evaporation has been reduced about 2 to 3 percent under the straw deep mulching.At the same time,straw deep mulching has an active effect on protecting the deep soil moisture.
2006 Vol. 4 (2): 34-38 [
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1554
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39
HU Xiang-Meng-；Cheng-Ji-Min-；Mo-Hui-E-；Diao-Yan-Yun-；Xu-Xuan-Bin-；Li-Feng-Yuan
Effect of short-term watering on photosynthetic characteristic and chlorophyll fluorescence of
Stipa bungeana
Watering is an important factor affecting growth and yield of plant,mainly in arid and semi-arid（regions,） where plants are often subjected to periods of drought.Summer rains are important for most plants of（semi-）arid regions.A further understanding of the utilization of rain by plants requires information about（responses） of gas exchange and chlorophyll fluorescence to rainfall.In present research,the rainfall after（extreme） drought was considered to be reference;the effect of short-term（watering） after long-term drought on photosynthetic characteristics of
Stipa bungeana
was studied.The results indicated that,after watering,the leaf water potential recovered significantly,which resulted to RuBPCase/Oase activity increasing.Light saturation point（LSP）,apparent quantum yield of photosynthesis（AQY）,carboxylation efficiency（CE） and maximum photosynthetic rate with light and CO
2
saturating(
A
max
) also were higher in leaves grown short-term（watering） condition.The stomata limitation or non-stomata limitations of photosynthesis were catabatic in
Stipa bungeana
leaves after watering.Meanwhile,conversion efficiency of primary light energy（
F
v
/
F
m
） of PSⅡ in
Stipa bungeana
was partially come back after short-term watering,and the parameters of chlorophyll fluorescence such as,the quantum yield of PSⅡ electron transport（
Phi
PSⅡ） and the non-photochemical quenching coefficient（NPQ） were increased significantly in the short-term watering condition.Under different water conditions,the light induction processes were different significantly.Net photosynthetic rate（
P
n
）,stomata conductance（
g
s
）,actual PSⅡ efficiency（
Phi
PSⅡ） and non-photochemical quenching（NPQ） of watering leaves increased to maximal levels in a short period,whereas it took a much longer time for those of water stress leaves to reach maximal levels.The short-term watering
Stipa bungeana
leaves had a higher capacity to avoid photo-damage due to protective mechanisms,such as xanthophylls cycle-dependent dissipation of excessive energy.
2006 Vol. 4 (2): 39-46 [
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1304
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47
ZHANG Ke-Bin-；Yang-Xiao-Hui
Global eco-system millennium assessment by United Nations: Progress of desertification assessment
It takes 5 years for United Nations to finish Millennium Ecosystem ssessment(MA).Dryland(ecosystem) and dryland degradation/desertification are the very important issues in the MA.Based on MA,it is introduced about better understanding of desertification,causes of desertification,desertification influence scale,impacts of desertification to ecosystem and human society,relations among desertification,global climate change and biodiversity loss,effect of different future development paths on desertification and prevention methods of desertification.
2006 Vol. 4 (2): 47-52 [
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1299
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1520
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53
FAN Rui-Yu
Relative stability analysis of dam system in Xiheidaigou Watershed
In order to provide scientific basis for the planning and feasible study,the relative stability of dam system has been studied and analyzed according to the observed data of present control situation in Xiheidaigou watershed and its relative factors which influenced the stability of dam system.The results show that the silted area is one of the basic conditions,but not the sole condition.Judging whether or not dam system has brought about relative stability must satisfy with the concourse of four conditions.There should be 7.8?hm
2
/km
2
of silted land area.The coefficient of relative stability of dam system should reach 1/12.7.After the dam system has been operated for 15 years the dam should be maintained and heightened in each 3 or 5 years so that the dam system's capacity of preventing and controlling flood could be holding or larger than the standard of only once in 100 years.There should be 0.3 main dam and 1.0 check dam within one kilo squire meter.The overall layout and structure of dam system should be rational so that storm flood could be distributed harmoniously.The safety coefficient of dam system should be smaller than 1.After accomplishing the construction target dam system has gotten into the stage of relative stability.Under the flood standard of only once in 100 years,the safety coefficient of dam system（Icp） is equal 0.94,the high stalk crops that have been planted in dam land can harvest.The dam safety and capacity of harvest in dam system can be tending to unify.
2006 Vol. 4 (2): 53-61 [
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1408
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62
SONG Wei-Feng-；Chen-Li-Hua-；Liu-Xiu-Ping
Experiment on characteristic of interface between root system and soil
In order to probe into the frictional characteristic between root system and soil,based on the Coulomb theory,under different soil water content and soil bulk density,different normal load between root system of
Pinus tabuleeformis
,
Robinnia pseudoscacia
and soil,the shear characteristics between root system of
Pinus tabuleeformis
,
Robinnia pseudoscacia
and soil were investigated by the method of shear tests.The results showed that the frictional resistance of between root system of
Robinnia pseudoscacia
and soil was higher than that of Pinus tabuleeformi.At last,the influences of normal stress,root system species, soil bulk density and soil water content on the shear characteristic of interface were discussed.
2006 Vol. 4 (2): 62-65 [
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1489
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1353
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66
LIU Xiu-Ping-；Chen-Li-Hua-；Song-Wei-Feng-；Rao-Liang-Yi-；Hu-Yu-Cun
Experimental on resistance to tensile stress and complete stress-strain curves of root system of
Pinus tabuleeformis
The mechanisms of soil-reinforcement by roots system have been researched through the tests for the pull-resistance of roots system of
Pinus tabuleeformis
in the Loess Plateau.The theory analysis and compare(results) of complete stress-strain curve show that load,stress,extend and strain increase pro rata, complete stress-strain curves present straight line relation in root system initial stage after tension.As the continuation of pulling force increases after loading over elastic limit,plasticity out of shape takes place in the root system,the complete stress-strain curves deviate from the straight line gradually, reflect the highly non-linear elastic characteristic.The test indicates that the root system tensile strength of the
Pinus tabuleeformis
have extremely close dependence to resist the amount of tension elastic model,according to results of the test,the unify mathematic expression of resistance to tensile stress and complete stress-strain curve is put forward,Which merge better between theory curves and experimental curves.
2006 Vol. 4 (2): 66-70 [
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1573
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71
CHEN Ji-Hu-；Tu-Xin-Xiao-；Wei-Xiang-Liang-；Liu-Peng-；Zhang-Chang-Da-；Xie-Gang
Fractal characteristics of Tilia tomentosa's root system under different water conditions
Fractal theory was used to investigate the configuration characteristic and physiological function of root system.Fractal dimension(FD),root system abundance and root system length of
Tilia
tomentosa seedlings potted four-year-old were studied under different water levels.The results showed that the value of FD in waterlogged treatment was the smallest in all treatments.The value of FD decreased under drought stress,and which increased when root system was drought at beginning and then watering.With the enhancement of drought stress intensity,the root system abundance of
Tilia
tomentosa was decreasing,but the differences among different treatments were not significant.The root system length was also decreasing but the differences among different treatments were significant.The changes of root system vigor under different water conditions were studied,and the correlation of root system vigor with fractal dimension(FD),root system abundance and root system length was analyzed.The results indicated that the root system vigor was strongly positive relation to those indices.
2006 Vol. 4 (2): 71-74 [
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1767
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2226KB] (
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75
ZHANG Meng-Ru-；Di-Meng-Pu-；Wang-Hua-Yong
Ecological strategies and approaches of vegetation restoration in the hilly area of Taihang Mountain
The research results on the vegetation restoration are reviewed,and ecological strategies and approaches for vegetation restoration are probed into in the hilly area of Taihang Mountain.According to the basic characteristics of the modern ecotone and vegetation restoration in the study areas,6 ecological strategies on the vegetation restoration and reconstruction are put forward.The approaches of vegetation restoration are discussed from the point view of applying the closed method to make full use of the resilience of natural vegetation,human being-accelerated methods to speed up the restoration process of natural vegetation and reconstructing a completely new type of eco-economic communities by selecting the perennial plant species such as the native species and naturalized species with higher eco-economic values.Some problems of the vegetation degradation,restoration and reconstruction should be settled in the future study,such as the ecological effects of spatial heterogeneity of the small scale to the vegetation restoration;constructing the eco-economic community to form the ecological buffering zone at the ecotone between the fertile farmland and natural vegetation;identifying the relationship between plant reproductive strategies of the natural vegetation and disturbance;and taking the natural communities locating at the flat between the cliffs as the reference model of vegetation restoration characterized by little disturbance from human beings in the hilly area of Taihang Mountain.
2006 Vol. 4 (2): 75-81 [
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1414
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4290KB] (
1211
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82
GENG Xian-Shuang-；Liu-Xia-；Zhang-Guang-Can-；Wang-Li-；Li-Jun-；Jia-Jiang-Bao
Species diversity of typical artificial forest communities of Huangqian reservior watershed
In order to offer a scientific theory for the further management of the artificial forest communities in Huangqian watershed,the flora composing and the geography ingredient of four typical forests are analyzed,and the characteristics of species diversity are quantitatively researched by normal investigating method.The results showed that: Firstly,the flora of the watershed was richer which accounts of 13.02% of Tai Mountain flora.Secondly,the difference of simpson index,Shannon-Wienner index and evenness index of shrub and herb layer in four soil and water conservation forest communities was non-significant.But the richness index was significant.The development of herb was better than shrub obviously.Thirdly,each artificial forest community was still in primary stage of succession.The vegetation under artificial mixed forest was mainly shady species and under other forests was mainly sunny species as Herbaceae.Fourthly,the analysis on total species diversity characteristic of four manmade communities showed that the total species richness of Castanea mouissima was the lowest,the evenness index was the largest and the diversity index was smaller,while the total species richness of the man-made mixed forest of Pinus densiflora and Acer truncatum was the largest,it's diversity index was also the largest,but it's evenness index was smaller.The total diversity of artificial mixed forest was larger,while single forest was smaller.Artificial mixed forest was advantageous to development and renewal of vegetation under woody layer.
2006 Vol. 4 (2): 82-88 [
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1503
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3598KB] (
1390
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89
SONG Xiao-Yang-；Niu-Shu-Kui-；Bang-Biao-；Li-Yan-Qun-；Huang-Yun-Feng
Community structure characteristics of
C.carlessii
forest under different regeneration patterns at Sanming in Fujian province
In order to know the succession and renovation process of
C.carlessii
forest community at cut-over land,based on community investigation of three sample plots in field and calculation key value,the community structure characteristics of
C.carlessii
Forest under different regeneration patterns at Sanming in Fujian Province are analyzed.The results showed that 13 families,16 genera and 20 trees species were natural regeneration(N.R.),5 families,6 genera and 6 trees species were artificial measures promoting regeneration(A.M.P.R.),1 family,1 genera and 1 specie are artificial generation(A.R.).The effects of DBH of different regeneration patterns of
C.carlessii
forest are as following: trees of small DBH are more than trees of big DBH in N.R.stand;trees of big DBH are more than trees of small DBH in A.M.P.R.stand;trees of small and big DBH are less than trees of middle DBH in A.R.stand.Spatial distribution of different regeneration patterns
C.carlessii
N.R.stand has a tendency increasing progressively from the upper to the lower.A.M.P.R.stand tends to normal distribution.N.R.stand is subject to normal distribution.The species richness in different regeneration patterns of
C.carlessii
forest is N.R.stand>A.M.P.R.stand>A.R.stand in turn.
2006 Vol. 4 (2): 89-94 [
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2254
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3474KB] (
1289
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95
WEI Xiang-Liang-；Tu-Xin-Xiao-；Chen-Ji-Hu-；Liu-Peng
Regional approach for introduction of
Tilia tomentose
in northern China
Tilia tomentosa
Moench originated from Europe and introduced successfully to America,is a kind of superior plant resources for its ecological,economic and societal values.In order to successful introduction of Silver linden,the regions for introduction of silver linden in Northern China are divided and main climatic factors affecting growth of silver linden in 30 sample plots of Northern China and 18 distribution region of America are analyzed by applying PCA and cluster analysis statistic methods.The results show that temperature,heat,precipitation and its distribution are the critical climate factors to determine the introduction and cultivation of silver linden.Climatic factor indexes suitable to grow of silver linden are annual mean temperature(3-18℃),≥10℃ accumulated temperature(2300-6000℃),Mean temperature in coldest month(-14-6℃),Kira's warmth index(51-152),Kira's coldness index(<-68),precipitation during the growing period(200-850mm),Kira's aridity index for growing period(1.5-7.4) and annual duration of sunshine(2300-3700h).Comparing with the distribution regions of silver linden,the lower temperature in winter,inadequate precipitation during the growing period and the difference in rain tape are common problems for Northern China to introduce silver linden.There are three climate types suitable for growth of silver linden in Northern China,namely,warm temperature semi-humid climate region at first,moderate temperature semi-humid/arid and semi-humid climate region at second.
2006 Vol. 4 (2): 95-102 [
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1415
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1423
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103
XU Jun-Liang-；Ma-Lv-Yi-；Yan-Hai-Beng
Relationship between process of sap flow of
P.tabulaeformis
and solar radiation
In order to investigate the relationship between time processes of solar radiation and sap flow systematically,sap flow velocity(SFV) of
P.tabulaeformis
and effective solar radiation(ESR) were synchronously monitored for one year in Beijing western mountains by using TDP systems(TDP30) and automatic weather station.Results showed that significant differences were found between changes of time characters of ESR and sap flow of
P.tabulaeformis
in sunny days of different seasons.Starting time,peak time and stopping time of sap flow were generally 03 h later than that of solar radiation while the lagged times were much longer in spring with more than 3.5 h.Duration times of sap flow showed obvious differences among different seasons that well regularity was not appeared.There exist a good quantitative correlation between time process characters(duration time of rising and falling,rising rate and peak time) of ESR and
P.tabulaeformis
sap flow in summer,while only the single character express a good correlation in spring and autumn.Seasonal models of sap flow velocity indicated that,it was more practical to simulate seasonal water consumption models of
P.tabulaeformis
from ESR especially in autumn.Furthermore,these models should be optimized later.
2006 Vol. 4 (2): 103-107 [
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1552
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2621KB] (
1320
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108
ZHANG Wei-Jiang-；He-Kang-Ning-；Wang-Zheng-Ning-；Tian-Jing-Hui-；Yin-Jing
Effects of light radiation intensity on photosynthetic characteristics and water use efficiency to seedlings of
Platycladus orientalis
and Pinus tabulaeformis
In order to offer scientific base for cultivation and management of forest,effects of light radiation intensity on photosynthetic characteristics and water use efficiency of
Platycladus orientalis
and
Pinus tabulaeformis
were studied under different soil moisture content.Controlling soil moisture,under the simulated light photosyntyhetic radiation（SPR）,net photosynthetic rate （
P
n
）,transpiration rate（
T
r
）,water use efficiency（WUE） and intercellular CO
2
concentration（
C
i
） of
Platycladus orientalis
and
Pinus tabulaeformis
was studied in a semi-arid region of loess plateaus.The results showed that within the range of 0（2200）μmol photons/（m
2
·s）,
P
n
,Tr and WUE enhanced with an increase of the SPR for
Platycladus orientalis
and
Pinus tabulaeformis
,but
P
n
and WUE of
Platycladus orientalis
and
Pinus tabulaeformis
declined with continued increase of the SPR;
P
n
,
T
r
,WUE and light saturation point（LSP） of
Platycladus orientalis
was higher than
Pinus tabulaeformis
,while light compensation point（LCP） of
Platycladus orientalis
was lower than
Pinus tabulaeformis
in the same soil moisture,efficiency of light energy utilization of
Platycladus orientalis
was higher than
Pinus tabulaeformis
;
P
n
,
T
r
and Ci of
Platycladus orientalis
and
Pinus tabulaeformis
enhanced with an increase of the soil moisture,while WUE declined.The LSP of
Platycladus orientalis
was respectively（1275）,（1450） and（1675）μmol photons/（m
2
·s）,and LCP was respectively（4225） and 13μmol/（m
2
·s）,with the maximum
P
n
of 3.04,4.06 and 5.53μmol/（m
2
·s）,under the soil moisture of 7.90%,13.00% and 19.99%;The LSP of
Pinus tabulaeformis
was respectively（1100）,（1325） and（1500）μmol/（m
2
·s）,and LCP was respectively 60,30 and 23μmol/（m
2
·s）,with the maximum
P
n
of 1.08,3.35 and 4.36μmol/（m
2
·s）,under the soil moisture of 7.83%,13.04% and 20.15%.
2006 Vol. 4 (2): 108-113 [
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114
FAN Jun-；Shao-Meng-An-；Wang-Quan-Jiu
Development about methods of soil hydraulic conductivity determination in fields
Soil hydraulic conductivity is an important factor for determination of proportion of precipitation infiltration to runoff in slope,and which is a key parameter in soil moisture circulation and soil erosion models.A great deal of theories and methods about it were studied in the world.The theories and application about methods of parameter determination on soil hydraulic conductivity in fields are reviewed,and the advantages and disadvantages of those methods are analyzed.Brief and clipping apparatus of determination soil hydraulic conductivity would be applied gradually,and the method of reducing head of emitter would be applied widely because of saving water and determination speediness.Disc infiltrometer is a portable apparatus,the more information and data could be selected by which,and which could be used in determination of soil hydraulic conductivity in slope,so the relative research about it should be developed widely.
2006 Vol. 4 (2): 114-119 [
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1284
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120
WANG Bo-Wen-；Chen-Li-Xin
Review on methods of soil quality evaluationC
In order to sum up the development of soil quality evaluation methods completely,some quantitative evaluation methods within recent years were summarized,including index method,model method,and method of Geographic Information System(GIS) and so on.Index method was relatively simple and practicable,and model method had obvious logicality and system.The evaluation method based on GIS was objective,and had greater potential capacity,and soil could be managed continuously with the dynamic monitoring method.In the future,to provide the basis for reasonable development and use of soil,the quantitative estimation and qualitative estimation should be combined in appraise of soil quality,the feasible indexes of soil quality should be selected,the existing appraised methods should be consummated constantly,and the predominance of information technique should be brought into play.
2006 Vol. 4 (2): 120-126 [
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