阿克苏棉区不同氮磷钾配比对棉花产量的影响

在新疆阿克苏棉区开展了氮磷钾最佳配比和施用量（专用肥）的田间试验。结果表明，Ｎ在１７２．５－２４１．５ｋｇ／ｈｍ＾２的前提下，氮磷钾各因素对棉花产量的影响顺序为Ｐ＞Ｋ＞Ｎ；最佳氮磷钾配比为Ｎ：Ｐ２Ｏ５：Ｋ２Ｏ＝１：０．６７：０．２３。氮磷对棉花单株铃数影响较大，而钾对单铃重的影响较大。按最佳氮磷钾配比制作成棉花专用肥，其最高产量施肥量为７４３．２ｋｇ／ｈｍ＾２。

Effect of the Proportion of Nitrogen,Phosphorus and Potassium to Cotton Yield in Akesu Region, Xinjiang

The results of the fields experiment in Akesu region in South Xinjiang show that the sequence of nitrogen,phosphorus and potassium affecting the cotton yield is P > K > N from 172.5 kg/hm² to 241.5 kg/hm² 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 Akesu region of South Xinjiang is 1:0.67:0.23.Special fertilizer wasmade according to this proper proportion and the amount of the special fertilizer applying of the highes tyield is 743.2 kg/hm².