Study on Environmental Risk and Economic Benefits of Rotation Systems in Farmland of Erhai Lake Basin

文献类型： 外文期刊

第一作者： Tang Qiu-xiang

作者： Tang Qiu-xiang;Ren Tian-zhi;Schweers, Wilko;Liu Hong-bin;Lei Bao-kun;Zhang Gui-long;Lin Tao

作者机构：

关键词： watershed management;Erhai Lake;farmland;crop rotation;environmental risk;economic benefits

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2012 年 11 卷 6 期

页码：

收录情况： SCI

摘要： This study was designed to find out an optimised planting system of reducing non-point (source) pollution by analyzing the reasons and the factors of influence non-point pollution in farmland of Erhai Lake basin. The results showed that incomes, residual nitrogen in soil, and the loss of nitrogen in surface water in rice-garlic system were higher than those in rice-fava bean system. There were positive correlations between the nitrogen loss of farmland, nitrogen inputs, residual nitrogen in soil, and incomes of farmland. Economic benefits and environment benefits are both appropriate, if the area of rice-garlic system would be reduced to 53% and the area of rice-fava bean system increased to 36% of total cropping area in the investigated watershed. Adjustment of planting structure and introduction of reasonable rotation systems is considered an effective measure of controlling agricultural non-point pollution in watersheds of Erhai Lake.

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