On basis of “3414” experiment, regression analysis was conducted on rel- ative yield and fertilizer quant;.ty, and a regression equation was established, as fol- lows： Y=I 699,09 ＋52.89N -3i82P ＋59.27K-1.17N2 -0....On basis of “3414” experiment, regression analysis was conducted on rel- ative yield and fertilizer quant;.ty, and a regression equation was established, as fol- lows： Y=I 699,09 ＋52.89N -3i82P ＋59.27K-1.17N2 -0.11 p2 ＋0.06K2 ＋2.02NP-2.16NK- 1.97PK （FF=0,98）. The results of regression analysis showed F〉F0.05, indicating that fertilizer quantity is of significant regression relationship with yield. It was analyzed that yield-increasing range of N fertilizer was directly proportional to fertilizer quanti- ty, and negative yield even occurs if excessive P fertilizer is applied. In general, fertilizer effects from high to low were N fertilizer〉K ferUlizer〉P fertilizer. Besides, on equation aralysls, it was proposed the optimal fertilizer quantities included N fertilizer （N） of 270 kg, P fertilizer （PUs） of 165 kg and K fertilizer （K20） of 225 kg for achieving ideal yield of 2 500 kg/hm2 of luffa in Foshan. Key words Foshan; Luffa; Index system of fertilization; Efficiency analysis展开更多
基金Supported by High-efficient Cultivation Technology System Construction Project of Characteristic Vegetable in Foshan([2015]12)Special Fund of Minstry of Agriculture(201503106)~~
文摘On basis of “3414” experiment, regression analysis was conducted on rel- ative yield and fertilizer quant;.ty, and a regression equation was established, as fol- lows： Y=I 699,09 ＋52.89N -3i82P ＋59.27K-1.17N2 -0.11 p2 ＋0.06K2 ＋2.02NP-2.16NK- 1.97PK （FF=0,98）. The results of regression analysis showed F〉F0.05, indicating that fertilizer quantity is of significant regression relationship with yield. It was analyzed that yield-increasing range of N fertilizer was directly proportional to fertilizer quanti- ty, and negative yield even occurs if excessive P fertilizer is applied. In general, fertilizer effects from high to low were N fertilizer〉K ferUlizer〉P fertilizer. Besides, on equation aralysls, it was proposed the optimal fertilizer quantities included N fertilizer （N） of 270 kg, P fertilizer （PUs） of 165 kg and K fertilizer （K20） of 225 kg for achieving ideal yield of 2 500 kg/hm2 of luffa in Foshan. Key words Foshan; Luffa; Index system of fertilization; Efficiency analysis
