河西走廊地区不同氮磷钾最佳配比对棉花产量影响

Effect of the Optimal Proportion of Nitrogen, Phosphorus and Potassium to Cotton Yield in Hexi Corridor Region of Gansu

在甘肃河西走廊地区开展了棉花氮磷钾最佳配比和施用量的田间试验。结果表明,N在172.5￣241.5kg/hm2的前提下,氮磷钾各因素对棉花产量的影响顺序为P>K>N;氮、磷对棉花单株铃数影响较大,而钾对单铃重的影响较大。最佳氮磷钾配比为N:P2O5:K2O=1:0.67:0.23。

The results of the fields experiment in Hexi region in Gansu show that the sequence of nitrogen, phosphorus and potassium affecting the cotton yield is P〉K〉N from 172.5 kg/hm^2 to 241.5 kg/hm^2 of N, Phosphorus and nitrogen are more important factor effecting the cotton boll number per plant than potassium and potassium is an important factor to the cotton boll weight. The proper proportion of N, P2O5 and K2O in Hexi region of Gansu is 1：0.67：0.23.