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为探讨巢湖富营养化与流域农业生产投入资源的关联性,选择了化肥剩余、节水灌溉面积、农膜、水土流失治理等可能影响水体富营养化的因子;研究中采用相关分析与逐步回归的方法,同时,提出了一种结合Technique for Order Preferenceby Similarity to Ideal Solution(TOPSIS)法计算化肥剩余量的方法.结果表明,巢湖流域农业生产投入的各种资源中,对巢湖水体富营养化影响较大的是化肥剩余、节水灌溉面积和农膜,并且化肥剩余的影响还存在1 a的滞后期.因此,有必要从提高化肥利用效率、改进灌排水方式并减少农业用水入手,以求节约资源,同时降低农业生产对巢湖水质的影响.
In order to explore the correlation between Chaohu Lake’s eutrophication and resources for agricultural production in the basin, the factors that may affect the eutrophication of the water body, such as surplus fertilizer, water-saving irrigation area, plastic film, soil erosion control and so on, were selected. Correlation analysis and stepwise regression A method for calculating the remaining amount of fertilizer in combination with the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) is proposed.The results show that the eutrophication of Chaohu Lake is affected by various inputs of agricultural production in Chaohu Lake Basin Larger is the surplus of fertilizers, water-saving irrigation area and plastic sheeting, and the remaining impact of fertilizers still lags 1 la period.Therefore, it is necessary to improve the efficiency of chemical fertilizers, irrigation and drainage systems to improve and reduce agricultural water start to Save resources and reduce the impact of agricultural production on the water quality of Chaohu Lake.