氮磷钾肥对甘蔗产量和含糖量的影响

Effect of N,P,K on Yield and SugarContent of Sugarcane

在采用３因素５水平最优试验设计进行连续两年的田间试验基础上，通过回归分析，论述了试验条件下氮、磷、钾肥对甘蔗产量和含糖量的影响．结果表明，无论是新植蔗还是宿根蔗，氮、磷、钾的施用与产量和潜在产糖量之间都存在着二次回归关系，其单因素效应及交互效应对产量和潜在产糖量都产生影响，相对而言，氮对产量、磷对潜在产糖量的影响分别较其它两者为大；产量、纯经济效益及潜在产糖量最佳时的施肥组合为：新植蔗：ＸＮ：３５８５～３９０，ＸＰ：１１５５～１７１，ＸＫ：２６４～２９２５，其取中值时的配比为１∶０３８∶０７４．宿根蔗：ＸＮ：４３０５～５２６５，ＸＰ：２６７～２７３，ＸＫ：３５８５～３９６，其取中值时的配比为１∶０５６∶０７９．

A experiment with three factors and five Levels has been conducted for two years,to check the effect of N,P2O5,K2O on yield and sugar content of sugarcane.Results showed that they are regression relationship between N,P2O5,K2O and yield,potential sugar yield both planting and stubble cane.Whether nutrient or interaction among three nutrient influences the yield and sugar content of sugarcane,but the effect of N on yield,P2O5 on sugar content is more significant relatively than that of others.The simultaneous rate of fertilizer combination for optimal yield,sugar content and economic income is X 239～260,X 77～114,X 176～195 for planting cane and X 287～351,X 178～182,X 239～264 for stubble cane.