贵州不同海拔地区马铃薯施用氮磷钾肥的效应

Effects of Different N,P and K Proportion on Yield and Economic Benefit of Potato Planted in Areas with Different Elevation

为探讨贵州不同海拔马铃薯高产、高效的施肥技术,在贵州低海拔的黄平和高海拔的威宁县进行了氮磷钾肥效试验。结果表明,不同海拔马铃薯熟期不同,对氮磷钾肥需求有差异;中低海拔地区种植早熟马铃薯(费乌瑞它)的氮、磷、钾用量为N 10kg/667m2、P2O59kg/667m2、K2O 18kg/667m2;高海拔地区种植晚熟马铃薯(威芋3号)的氮、磷、钾用量为N 16kg/667m2、P2O59kg/667m2、K2O 16kg/667m2,按此推荐量施肥,可获得较高的产量和较好的经济效益。

The fertilizer efficiency of different N,P and K proportion was tested in potato fields with different elevation in Huangping and Weining counties,Guizhou to probe the suitable fertilizing technique for high yield and economic benefit of potato planted in areas with different elevation.The results showed that there was difference in requirement of N,P and K fertilizer between different maturity periods of potato varieties planted in areas with different elevation,the optimum N,P and K amount for high yield and economic benefit of Favorita（early maturity） in middle-low elevation area was 10 kg/667m2,9 kg/667m2 and 18 kg/667m2 separately,the optimum N,P and K amount for high yield and economic benefit of Weiyu 3（late maturity） in high elevation area was 16 kg/667m2,9 kg/667m2 and 16 kg/667m2 respectively.