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在佛山市丝瓜主产区系统开展“3414”试验的基础上,深入分析了丝瓜相对产量与施肥量之间的回归关系,并建立了三元二次回归方程:Y=1 699.09+52.89N-3.82P+59.27K-1.17N~2-0.11p~2+0.06K2+~2.02NP-2.16NK-1.97PK(R~2=0.98)。通过方差分析,得出F>F0.05,表明丝瓜施肥量与产量之间存在较为显著的回归关系。同时该研究还详细探讨了丝瓜生产中肥料增产效应和经济收益之间的关系,结果表明氮肥的产量和经济效益都在一定范围内与施肥量成正比:而继续增加磷肥用量时,丝瓜的产量和经济收益都无增加趋势,总体表现为氮肥对产量的影响>钾肥>磷肥。该研究在总结两年试验结果的基础上,综合提出佛山地区丝瓜37 500 kg/hm~2理论产量的最佳施肥量分别为氮肥(N)270kg、磷肥(P_2O_5)165 kg和钾肥(K_2O)225 kg。
Based on the “3414” experiment conducted in the main producing area of loofah in Foshan City, the regression relationship between the relative yield of loofah and the amount of fertilizers was analyzed in depth and the ternary quadratic regression equation was established: Y = 1 699.09 + 52.89 N-3.82P + 59.27K-1.17N ~ 2-0.11p ~ 2 + 0.06K2 + ~ 2.02NP-2.16NK-1.97PK (R ~ 2 = 0.98). Through analysis of variance, F> F0.05 was obtained, which showed that there was a significant regression relationship between the amount of loofah and the yield. At the same time, the study also discussed in detail the relationship between the yield-increasing effect of fertilizer and the economic benefit in loofah production. The results showed that both the yield and the economic benefit of nitrogen fertilizer were proportional to the amount of fertilizer application within a certain range: while the output of phosphorus fertilizer continued to increase, And economic benefits have no increasing trend, the overall performance of nitrogen fertilizer on the impact of> potassium> phosphate fertilizer. Based on the results of two years’ experiment, the research put forward that the best fertilization amount of 37 500 kg / hm ~ 2 theoretical yield of Foshan sponge gourd was 270kg nitrogen fertilizer, 165kg phosphorus fertilizer and K2O, 225 kg.