| The agriculture of the red soil region is very important in our country's agriculture. The research took Yiwu city Zhejiang Province, which was the developed red soil region in south china, as a case. Use natural science method and combine with social science method, qualitative analysis combining with quantitative analysis, dynamic analysis combining with static behavior. Get research data through literature review, data collection, questionnaires to experts and farm household. Do some researches in the agroecosystem develops, environmental condition of the agroecosystem and the assessment of the agroecosystem through trend analysis, cluster's analysis, establishment of some models. The main results are as follows:1. The main characteristic of the agroecosystem develops in Yiwu. (1)The total value of the three industries present the obvious ascendant trend during 1949 to 2001, the ascendant is especially fast after 1990. The second industry and the third industry increased faster than the primary industry. The ratio of primary industry appeared downward trend. The ratio of the second industry increased fast, especially after 1993. The ratio of the third industry appeared ascendant trend, the structure of the three industries trends rationally. (2)The agriculture gross output and the value of the other industries in agriculture all increased with high speed, but with different speed in different period. (3)The area of the food crops dropped suddenly, the area of the main economic crops fluctuated greatly in different year, the area of vegetable increased rapidly during 1999 to 2001. (4)The pig gross in end of the year increased from 60000 to 156500 during 1949 to 2001. The poultry gross in end of the year increased 10.48% every year. (5)The farm's gross income and gross outcome both increased rapidly, The farm's gross outcome have increased by more than 70 times, gross income have increased by more than 115 times. The people's lives are richer.2. Have analysed the industrial pollution and agriculture area-pollution state all-sidedly. Yiting town is the most of pesticide used, then Jiangdong, Houzai, Xialuozai. Yiting town is the most of fertilizer used in paddy field, then Jiangdong, Houzai, Choujiang, Suxi. The pollution of stockbreeding in Yiting town is most serious, then Futang, Jiangdong, Xiayan, Suxi. Use cluster's analysis method, The situation of agriculture area-pollution in Yiwu city was divided into four regions, analysed every areaagricultural development, explained the main reason to cause pollution.3. The agroecosystem sustainable development comprehensive evaluation, explain the theory of the agroecosystem sustainable development comprehensive evaluation, explain the construction procedure and method of the index system, use principal components analysis to filter indicators, use Delphi -AHP to get the weight of indicators, use AHP-FUZZY to do comprehensive evaluation. The agroecosystem sustainable development ability ascended to a Steady stage, the value of comprehensive evaluation from 0.45 to 0.50, The sustainable development ability is higher, from 1958, the value of comprehensive evaluation descended, to 1962, the value is 0.2448, from 1962 to 1994, the value is between 0.24 and 0.30. After 1994, The agroecosystem sustainable development ability ascended rapidly, to 2000, the value of comprehensive evaluation is 0.5468, is the supreme value after founding the state. In 2001, it descended to 0.4484.4. Have probed into the ways of adjusting and control of sustainable development of agroecosystem in Yiwu city. Make use of regional resource and market advantage, develop market and advantage agriculture; establish the mechanism of land circulation; The government should have a correct position in the agricultural work; improve the agricultural input environment; guarantee agricultural capital construction; set up the guarantee policy of agricultural products price; set up and amplify social service system; improve the quality of agricultural products; strength solve... |
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