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Assessment of Soil Quality and Environment for E-Zhou City, Effective Nutrient Evaluation and Application in Township Cropland Based on GIS

Author: LiHui
Tutor: HeLiYuan
School: Huazhong Agricultural University
Course: Plant Nutrition
Keywords: Soil Cultivated land fertility GIS Evaluation Model Information system Recommended Fertilization
CLC: X825
Type: Master's thesis
Year: 2004
Downloads: 229
Quote: 3
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Abstract


The soil agricultural production on the basis of arable land is the people's survival, the most basic means of production can not be replaced. The level of quality and environmental conditions directly affect the agricultural structure, the level of output of arable land and the quality of agricultural products. Along with social progress and development, population, resources, environment, pressure is increasing, and the requirements of the development of agriculture and agricultural products is also increasing. Arable land and population, arable land and resources, arable land and the environment, farmland and food, which has become highly concerned about the world and the field of scientific research are important issues. Adapt to the adjustment of agricultural structure, promote pollution-free agricultural production, and maintain the sustainable development of agriculture and improve the productivity of farmland and comprehensive production capacity, an urgent need to conduct a comprehensive survey of the arable soil quality and environmental conditions. Only to find out the basis of production capacity of cultivated land, soil fertility status, environmental quality, and soil Obstacles to safety production planning for the development of agriculture, agricultural restructuring plan, protection and construction of sustainable agricultural development planning, as well as quality of arable land, arable land improvement and utilization etc. to provide a scientific basis. In this paper, as a pilot Ezhou city of Farmland survey, the use of advanced computer technology and GIS tools, investigation and evaluation of cultivated land fertility. Made some progress, mainly: 1. Evaluation of Farmland. Ezhou City, Hubei Province, for example, to collect and collate the relevant maps, data, text and multimedia materials. Soil map and land use map superimposed to form a unit for evaluation unit, choose organic matter, available K, available P topsoil texture, PH, CEC, the plow layer thickness, the winter groundwater levels, soil parent material, slope phase, cooked drainage capacity, obstacle level 13 as indicators of Ezhou City Evaluation of Farmland, the right to calculate various indicators using analytic hierarchy process re-establish the corresponding attribute database and spatial database, application evaluation model to determine the basis of cultivated land fertility. The results showed that the total area of ??cultivated land in Ezhou City of 40,933.3 hectares, including first-class 1462.5 ha, accounting for 3.6% of the total area of ??the second, 7692.1 hectares, accounting for 18.8% of the total area, the third class to 16,079.3 hectares of the total area 39.3%, four of 12,733.6 hectares, accounting for 31.1% of the total area of ??five to 2625.7 hectares, accounting for 6.4% of the total area, six to 299.2 hectares, accounting for 0.7% of the total area. 3. Recommended fertilization. DU Town farmland nutrient status of Ezhou City Classification Based on the use of GIS, global satellite positioning system (GPS) positioning 500m × 500m grid method to obtain 134 topsoil samples, analysis of samples of organic matter, nitrogen, indicators available P, K, pH 5, with comprehensive scoring farmland nutrient grading nutrient levels recommended fertilization method. 2. The results of the network released. The rapid development of Web technology and GIS merging produce WebGIS based on the Internet, so as to broaden the channels for information dissemination, makes information sharing more convenient. In this paper, the ERSI company ArcIMS publishing platform, designed to achieve Internet Browser / Server model-based County municipal cultivated land in information systems. The system Ezhou City, Hubei Province, land use, soil types, soil nutrient distribution of information and cultivated land fertility dynamic query vector map display scaling, distance measurement, buffer analysis function.

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CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Analysis and Evaluation of Environmental Quality > Soil evaluation
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