Comprehensive Evaluation of Nitrogen Fixation Capacity-Yield-Quality of Soybean with Nitrogen Fertilizer Application
In order to evaluate the synergistic enhancement of nodulation,nitrogen fixation capacity,yield and quality of soybean varieties with various amounts of nitrogen fertilizers rates and application periods,this article took the no nitrogen fertilizer treatment as the control,and the principal component analysis and the weighting method of the subordinate function were used to comprehensively evaluate the nodulation,nitrogen fixation capacity,yield and quality of soybeans under different treatments.The results showed that the responses of nodulation,nitrogen fixation capacity,yield and quality indexes of high-protein and low-protein soybeans under different nitrogen fertilizer treatments were different,and the correlation between the indexes was high.The principal component analysis showed that four principal components as the main indexes affecting the synergistic improvement coefficients of nitrogen fixation and yield and quality of soybean nodulation under different treatments.Further evaluated,analyzed and calculated by the affiliation function,the magnitude of nodulation,nitrogen fixation and yield quality synergistic improvement ability of low-protein soybean varieties under different treatments was shown as follows:VOS-DN＞ROS-DN＞ROS-GN＞ROS-CK＞VOS-CK＞VOS-GN;whereas,for the high-protein soybean varieties,the magnitude of the synergistic improvement ability of rhizomatous nitrogen fixation and yield quality under different treatments was shown as follows:RPS-DN＞VPS-DN＞RPS-CK＞VPS-CK＞PS-GN＞RPS-GN;and the low-protein soybean varieties scored higher than high-protein soybeans.
万方数据
维普
