扦插密度及氮肥用量对心香甘薯产量与效益的影响  

Effects of Planting Density and Nitrogen Fertilizer Amount on Yield and Economical Efficiency of Sweet Potato Xinxiang under Early Harvest

作　　者：刘伟明[1] 季志仙[2] 

机构地区：[1]台州科技职业学院,浙江黄岩318020 [2]浙江省农科院作核所

出　　处：《长江蔬菜》2012年第2期47-50,共4页Journal of Changjiang Vegetables

基　　金：农业部甘薯行业计划项目(nyhyzx07-012-12);台州市科技计划项目(053TG02)

摘　　要：试验采用二次饱和D-最优设计,研究了扦插密度、纯氮用量和氧化钾用量3个主要栽培因子对甘薯新品种心香产量及效益的影响。通过研究建立了心香产量和净产值回归模型,优化提出了供试农艺因子组合方案为667 m2扦插密度3 000株左右,追肥纯氮用量9～9.5 kg,基肥氧化钾用量9 kg左右。The research studied the effects of the three main planting measures, concerning stem planting density, amount of pure nitrogen and KzO fertilizer on the yield and economical efficiency of the new sweet potato euhivar Xinxiang, adopting the quadratic saturation D-optimal design method. The yield and the net production value regression equation of Xinxiang had been researched and established separately. The perfect combination scheme of the testing agronomic factors was obtained as follows： the planting density was about 3 000 plants/667 m2, the amount of pure nitrogen for topdressing was 9-9.5 kg/667 m2, and the amount of K20 for basal fertilizer was about 9 kg/667 m2.

关 键 词：甘薯 心香 扦插密度 施肥技术 

分 类 号：S531[农业科学—作物学]