Abstract:Through more than 20 years artificial vegetation restoration and stopping grazing in Zhifanggou watershed, the plant communities had obvious effect on the soil nutrient by vegetation accumulation on the top of the soil with various effect of different plant. The content of nutrient in the profile of soil in 0-20 cm was higher than that in 20-40 cm, and the increasing effect on soil nutrient by herbage communities was clearer than by arboreal communities and by bush communities. In addition, the content of nitrogen had a linear correlativity with the organic matter content. The content of phosphorus had a linear correlativity with organic matter too. However, in 20-40 cm soil layer, the relationship of linear correlativity was not significant.

Abstract:Soils permeability, derived from Quaternary red clay soil and red sandstone on three positions of upland are measured by Guelph method in hilly area of south China. The results show that values of saturated hydraulic conductivity of 0-5 cm top soils in down slope are always higher than that in up slope, no matter what kind of land use. It also increases with the increment of plant cover degree in grasses upland, and the relations of top soils permeability on the three positions of tilled upland can be arranged in value as follows: down slope>up slope>mid slope.

Abstract:The effect of composite potassium permanganate, powder activated carbon, pre chlorination and related process combinations among them are studied. The results show that to composite potassium permanganate with powder activated carbon can remove color, odor and turbidity effectively. From the experiment, It could provide a practicable, economical, effective pollutant removed means for old water factory.

Abstract:The understorey plant diversity of artificial recovered Pinus massoniana community by intercropping with shrub species was studied in Hetian town, Changting county, Fujian province. The results showed that the understorey plant species increased 18 years after the seriously eroded land was restored by fertilizer applying and Lespedeza bicolor intercropping, with 22 plant families, 30 genus, and 33 species. The areal types of genus were mostly tropical distribution. The major life form was evergreen shrub, and perennial and annual herbs were few. Phanerophytes took the dominant position. The importance value of Lespedeza bicolor,Adinandra millettii, Cunninghamia lanceolata, Camellia oleifera and Syzygium buxifolium were high in the shrub layer. Dicranopteris dichotoma took the dominant position in the herb layer. Shannon wiener diversity index was highest in the shrub layer, followed by herb layer, and lowest in the vine layer. Shannon wiener uniformity indexes was highest in the vine layer and lowest in the herb layer.

Abstract:Based on the field investigation and remote sensing cartography, the environmental condition and separate procession of land formation in Ansai experimental area are analyzed deeply. The quality evaluation of land resource type partition are carried. The conformation character, using status, quality difference and the major problem existent in all kinds of land types in the view of agriculture production and environment construction are comprehensive expatiated, and the exploiting direction of land resource and the measurement which should be taken are put forward.

Abstract:Huangfuchuan watershed is located in the heavy and coarse sediment region of the middle reaches of the Yellow river. Based on analyzing the status and characteristics of soil and water loss in Huangfuchuan watershed, soil and water conservation system is constructed with ecological and technological methods. Based on consulting the documents of standardization, analyzing the ecological, economic and social benefit, and assessing the economic feasibility, the results show that the economic, ecological and social benefit is outstanding, and it is feasible in economy.

Abstract:By the diagnosis of the water resource utilization, the current position of the water resource, and the problems of the water resource utilization in cities of northwest China are pointed out. Then the countermeasures are put forward on how to settle those problems and make the water resource utilization sustainable.

Abstract:To research the crop potential productivity can find the obstacle to improve yield, and can offer grounds for programming agricultural production. The temperature and climate potential productivity of Changwu experimental district in many years are compared with practical yield of winter wheat and spring maize. The results show that the wheat average heat potential productivity of the district in many years is 6910.5 kg/hm², that of maize 10718.6 kg/hm², the variance between years is not big. The wheat average climate potential productivity is 6190.3 kg/hm², that of maize is 8768.7 kg/hm²; variance between years very large in 1986-1990, the realizing rate is comparative low, but in 1990-1994, the rate is very high, almost equal to the climate potential productivity of the district. The items that are important in the future are: to stable chemical fertilizer application and rational proportion between N and P; to universe use of film mulches and stubble mulches; to increase the mount of organic fertilizer and the efficiency of field managements.

Abstract:The both special data structures, vector and raster, are used in surveying the regional soil erosion survey and mapping soil erosion intensity atlas based on the RS GIS (Remote Sensing and Geographic Information System). The methods and techniques were discussed, including how carve up polygons, how to capture the values of factors of impressing soil erosion, and how to differentiate erosion intensity. According to the analysis results based on the two special data structures, the two methods can both be used to estimate the soil erosion intensity, but each method has its respective characteristic. The method based on raster can reflect more of the erosion differentiation between the micro regions, meanwhile the method based on vector can do more of the distribution of various erosion intensity grade. From the dynamic monitoring and trend forecasting, it is convenient and more rapid for raster to capture the value of erosion factors, to analyze dynamic pattern and to predict the development.

Abstract:Through applying the clustering function of SOM (Self Organizing Mapping) network, MATLAB 5.3 software is used to classify 21 kinds of soil stylebooks in Sanjiang plain. Through comparing the result with reference No.1 which using the method of fuzzy clustering, it is concluded that the SOM network can reflect the complicated information among each soil stylebooks. The effect of classification is good, and it can be applied on soil classification.

Abstract:The domestic fungus development is an effective way with ecologic, economic and social benefit. It is also an inexorable demand of improving the people's food structure, economic smoothly developing, and quitting cultivated land to return the forest. Yan'an city is located in the north west edge region of China, the natural condition, geography factors, and the western part development policy have supported a good chance and beneficial future for domestic fungus development. The domestic fungus development is also the fundamental demand of the beauty mountains and ecological agriculture construction. By taking necessity and feasibility analyzing on domestic fungus development according to the domestic fungus production and developing trend of China and combine Yan'an ecological environment construction with domestic fungus development, the ecological industry garden and farmer's domestic fungus development model are put forward, and the specific designing and analyzing on edible ecologic industry garden are taken.

Abstract:As a case study in Jiangxi province, the eco-environment factors which affect soil and water loss are chosen. Then each factor is given avalue by soil erosion formula, and gotten a weight by adopt PCA method. The risk degree of soil and water loss are divided, and the results are analyzed.

Abstract:The aim and significance of dynamic monitoring of soil and water loss in Jiangxi province are analyzed. The principles, objectives, ranges and contents of dynamic monitoring are advanced. It is pointed out that the dynamic monitoring of soil and water loss must intensify construction of "Three Big Systems", namely network system, technology system and index system, and build the whole provincial management-information system of soil and water conservation.

Abstract:The achievements on supervising and executing the law of soil and water conservation of Fujian province are affirmed. In addition, five characteristics in the new situation and three aspects of difficulties existed there are also analyzed. Based on the above, five points of directions or suggestions are made on the future task of the supervising and executing the law of soil and water conservation, that is, establishing proper guiding ideas, strengthening the power of executing laws, broadening the task domain, setting up technique supporting systems and perfecting the law system.

Abstract:The coupling of GIS and ANN is used to early warning of the salinazation in west Jinlin plain. The spatial correlation coefficients, soil texture, the content of organic matter, the content of Na⁺, the population density and the number of livestock are selected as factors for salinzation early warning. The result shows that the non warning area covers 20.12% of the total area, the light warning area covers 20.92%, the moderate warning area covers 33.22%, the serious area covers 25.74%.

Abstract:To forecast the water quality at the definite range. Recurring to the common file, intersect the forecasting results and some geographic information by the powerful spatial analyses function of GIS, the methods and the flow of water forecasting are put forward by means of GIS. The research result indicates that the method is accurate and practicable, and has the highly extended value.

Abstract:Based on the introduction of basic conditions in west China, the major ecological environmental problems existing in the west China regions are analyzed and the countermeasures and suggestions of the conservation and construction of ecological environment in developing west China are put forward. The development of west China is a wonderful system project as well as an arduous and long term task, which might require the efforts of several generations. In the development of west China, the conservation of ecological environment should be given the first priority. We must improve our knowledge and take advantage of high technologies to energetically carry out Chinese eco agriculture, water saving agricultural practices, afforestation and soil erosion control projects.

Abstract:Based on field investigation and analyzing the material of Baota district, the theories of eco environmental planning is applied to evaluate the eco environmental features of this area, which is divided into five grades. In order to develop ecological construction in accordance with regional main conditions, this area is divided into three first class and eight second class sub regions on the basis of research. The main ecological and economic features of each regions are expounded, and then the ways and moulds for ecological agriculture and ecological environment in Baota district are advanced.

Abstract:The north Guangdong mountain is one of the main impoverished region in Guangdong province, the social and economic sustainable development is restricted by eco environment problems such as soil and water loss, poor in water resource, increased frequency in natural drought and water logging disasters, etc. The current situation and the cause of formation of agriculture ecological environment problems in the north Guangdong mountain area are analyzed. It is thought that deterioration of agriculture ecological system is caused by week ecological environment and man made interference for long time. The countermeasures of ecological environment comprehensiv improvement are put forward.

Abstract:The situation of ecological environment of Shaanxi province are analyzed form the aspect of soil erosion, land desertification, water resource, industrial pollution and so on. The factors that restrict social economical development of Shaanxi province are raised by giving some statistic data. The countermeasures are put forward to improve the environmental situation and speed up the economical development, that are (1) adjusting the structure of the land use, and developing the ecological industry; (2) strengthening the management of water resource and establishing water saving society; (3) speeding up the construction of forest and grass and protecting the biological resource; (4) optimizing the rural and urban energy sources structure and industry and town layout; (5) establishing the system of environmental impact evaluation; (6) establishing and perfecting environmental policies; (7) speeding up scientific and technological researches etc.