棉花“3414”肥料效应及推荐施肥量研究

[目的]研究不同氮磷钾肥用量对棉花生长、产量及经济效益的影响，为棉花合理施肥提供科学依据。[方法]利用“3414”设计原理，在湖北省沙洋县布置田间试验，并运用数学模型对结果进行统计分析。[结果]施氮增加了棉花株高、果枝层数和成桃数；施磷对株高和果枝层数无显著影响，但明显增加了成桃数；施钾导致果枝层数有所减少，对株高无明显影响。施氮棉花增产943．2kg／hm^2，增加纯收入3567．6元／hm^2；施磷最高增产284．4kg／hm^2。增加纯收入1129．2元／hm^2；施钾最高增产359．3kg／hm^2，增加纯收入1092．7元／hm^2。[结论]在该试验条件下，施氮效果最好，钾肥次之，施磷有一定增产增收效果；结合当地棉花生产实际，确定最佳氮磷钾施肥推荐用量分别为：N193．5kg／hm^2，P2O5 46．5kg／hm^2，K2P 132．0kg／hm^2，由此得出最佳产量为3741．0kg／hm^2。

Study on the Effect of "3414" Fertilizer and Recommended Fertilization Amount on Cotton

[Objective] The aim of this research was to study the effects of N,P and K fertilization on cotton growth,yield and economic benefit in order to provide the scientific basis for the right fertilization of rape.[Method] Based on "3414" fertilizer experiment protocol,a field experiment was conducted in Shayang County of Hubei Province.The mathematical model to the test result was established to discover the best formula applying fertilizer.[Result] The results indicated that the application of N could increas...