华北农学报2012，Vol.27Issue(z1)：320-327,8.
氮钾配施和栽插密度对甘薯干物质积累及产量形成的影响
The Effects of Different N and K Fertilizer Ratio and Planting Density on Yield and Dry Matter Accumulation of Sweetpotato
摘要
Abstract
A field experiment was conducted to study the effects and their interaction of different planting density and N,K fertilizer application amount on yield and dry matter accumulation of sweetpotato Sushu 15. The results show that dry matter accumulation and economic yield are significantly impacted by different amount of N, K and planting density and their interaction. Yields of dry matter had significant positive correlation with dry matter content , or number of base branches, and had extremely significant negative correlation with the rate of top and root, and had significant negative correlation with stem diameter. Dry matter content of storage roots had negative correlation with length of the longest vine, number of base branches, and had significant negative correlation with stem diameter. In 18 experiment treatments, the highly economic yield appeared in treatment of A1B1C1 ,and had the optimal rate of top and root. The effect of each factor on dry matter accumulation of storage roots was K fertilizer > planting density >N fertilizer,K fertilizer and planting density had significantly interaction effect;N fertilizer and planting density were mostly influence factor on dry matter accumulation of stems and leaves. Therefore, the basic conditions of obtained high yield were to maintain a reasonable planting density in sweetpotato production, it was unlikely to achieve super-high yield by increase planting density. Under the experiment condition, the combination of N 120 kg/ha2 K2O 180 kg/ha and 4.95 ?104 plant/ha is favorable for high economic yield of Sushu 15.关键词
甘薯/氮钾配施/栽插密度/干物质积累/产量Key words
Sweetpotato/ N and K fertilizer ratio/ Transplanting density/ Dry matter accumulation/ Yield分类
农业科技引用本文复制引用
贾赵东,马佩勇,边小峰,郭小丁,谢一芝..氮钾配施和栽插密度对甘薯干物质积累及产量形成的影响[J].华北农学报,2012,27(z1):320-327,8.基金项目
现代农业产业技术体系建设专项(CARS-11-C-03) （CARS-11-C-03）
国家863计划(2012AA101204-1-7) （2012AA101204-1-7）
江苏省科技支撑计划(BE2011301-1) （BE2011301-1）
江苏省农业科技自主创新基金(CX(10)134 （CX(10）
CX(11)1027) （11）
