氮磷钾肥不同配比对甘薯性状及产量的影响  

Effects of Different Proportions of Nitrogen,Phosphorous and Potassium on Characters and Yield of Sweet Potato

作　　者：周虹[1,2] 张超凡[1,2] 张亚 黄艳岚[1,2] 喻名科 王芳[1,2] 

机构地区：[1]湖南省作物研究所,湖南长沙410125 [2]国家甘薯产业技术体系长沙综合试验站,湖南长沙410125

出　　处：《湖南农业科学》2013年第12期54-56,60,共4页Hunan Agricultural Sciences

基　　金：国家甘薯产业技术体系项目(Cars-11-C-16);湖南省科技厅农业支撑计划项目(S2013N2022);湖南省农科院科技创新项目(2013YB17)资助

摘　　要：采用田间小区试验探讨了氮磷钾肥不同配比对甘薯性状及产量的影响。结果表明,在本试验条件下施用甘薯专用肥(N∶P2O5∶K2O=16∶8∶18)和氮磷钾配方肥(N∶P2O5∶K2O=6∶5∶10)处理,甘薯的茎叶生长与块根生长较协调,其中施甘薯专用肥处理甘薯经济性状佳,产量最高,鲜、干薯产量比对照分别增产60.7%和65.9%,经济效益也最好,鲜、干薯产值比对照分别增加43.7%和49.4%;其次是施用氮磷钾配方肥处理,鲜、干薯产量比对照分别增产50.6%和59.1%,鲜、干薯产值比对照分别增加32.5%和41.5%,甘薯单株结薯数多,大中薯率高,淀粉含量高。试验证明,该两种氮磷钾肥的配比比较科学,可在甘薯大面积生产中推荐使用。In order to provide the basis for scientific and suitable fertilization of sweet potato, the field plot experiment was conducted to study the effects of different proportions of nitrogen(N), phosphorous(P) and potassium(K) on characters and yield of sweet potato. The results showed that under experimental conditions, the treatment applied with sweet potato specialized fertilizer(N∶P2 O5 ∶K2 O=16∶8∶18)and NPK formula fertilizer(N∶P2 O5 ∶K2 O=6:5:10) all showed a relatively harmony growth of stem, leaf and earthnut, and high rate of large-medium sweet potato. Among all of the treatments, the one applied with sweet potato specialized fertilizer had great economic characters and the highest yield and economic benefit, with which the yield of fresh sweet potato and dry sweet potato increased by 60.7% and 65.9% and the benefit of fresh sweet potato and dry sweet potato increased by 43.7% and 49.4%, respectively compared with CK; the followed was treatment with NPK formula fertilizer, the yield of fresh sweet potato and dry sweet potato increased by 50.6% and 59.1% and the benefit of fresh sweet potato and dry sweet potato increased by 32.5% and 41.5%, respectively compared with CK, it means sweet potato production obtained a relatively great results, and its cost is low and easily get, can be used for guiding large-scale production.

关 键 词：甘薯 肥料 性状 产量 

分 类 号：S531[农业科学—作物学]