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湖南有紫色土山丘146.7万hm2,区内人口达800多万人。紫色土山丘地形以丘岗地为主,土壤含磷、钾、钙等矿质养分较多,质地偏壤,有利于发展农业生产,但紫色土山丘易旱,土壤有机质和氮素含量较少,水土流失严重,农业生产单一,农业经济效益不高。本文通过对湖南省紫色山丘区现有的农业复合模式进行全面调查和总结,在科学试验的基础上,选取总产值、纯收入、内部收益率三项指标,采用层次分析法,从8个一级复合模式下的30个二级复合模式中,对其中16个应用面积较大的林农间种复合模式进行综合分析,结合农产品比较优势和生态效益,遴选了一批经济效应、生态效应显著的模式。完善优化了4个农牧渔复合模式,经过实施和应用,取得了重大经济效益和生态效益。
There are 1,467,000 hm2 of purple earth hills in Hunan, with a population of over 8 million in the region. Purple soil hill topography is dominated by mound, the soil contains more phosphorus, potassium, calcium and other mineral nutrients, soil texture is conducive to the development of agricultural production, but purple soil prone to drought, soil less organic matter and nitrogen content, soil and water Serious loss, single agricultural production, agricultural economic benefits are not high. Based on the scientific experiments, this paper selected three indicators of total output value, net income, and internal rate of return. By using the analytic hierarchy process (AHP), from eight Among the 30 second-level compound models in the first-level compound model, a comprehensive analysis was made of 16 composite models of forest farmers with larger application areas. A number of economic effects were selected based on the comparative advantages and ecological benefits of the agricultural products with significant ecological effects Mode. Improve and optimize the four farming animal husbandry and fishing compound mode, after the implementation and application, has made significant economic and ecological benefits.