稻田玉米复种方式的生态经济效益及其综合评价

筛选出南方稻田适宜的玉米复种方式,通过推广,可解决南方饲粮短缺的矛盾。于1998年至2005年,在江西农业大学实验田,连续7年对稻田玉米不同复种方式进行研究。分析不同复种方式的产量、能流、物流、经济效益、生态效益等各项指标,采用主成分分析方法,筛选出评价指标,利用层次分析法(AHP)确定各指标的权重,用综合指数法对各指标进行综合评价,最后得出处理F(紫云英—玉米‖大豆—晚稻)的综合效益最佳,综合效益指数为0.9416。可在南方双季稻区广泛推广应用。

The Ecological, Economic Effects and Comprehensive Evaluation on the Multi-crop Patterns of Corn in the Paddy Field

Screening suitable multi-cropping patterns of corn in the paddy field in the southern China, it can resolve the contradiction of deficiency of corn in the South by extending the suitable pattern, and get the best comprehensive effect as well. The author continually researches the different multi-cropping patterns in the experimental field of JXAU from 1998 to 2005. In this paper, the yield, energy flow, material flow, economic efficiency, ecological efficiency of the different multi-cropping patterns of corn in the paddy field have been analyzed, as a result, treatment F (Chinese milk vetch-spring corn intercropping early soybean-late rice) has the highest yield, it reaches 15918 kg/hm2. Firstly, screen all of the targets which have been analyzed in the paper by using principal component analysis (PCA), then determine the weight of various targets by using analytic hierarchy process(AHP), finally, do the comprehensive evaluation for ecological, economic and social benefits by using comprehensive index method, it indicates that the treatment F(Chinese milk vetch-spring corn intercropping early soybean-late rice)is the best, and the comprehensive evaluation index is 0.9416, it can be applied widely in the two-crop paddy fields in the southern China.