高寒地区不同施肥量和密度对马铃薯产量的影响

Effect of Different Fertilizer Amount and Density on Potato Yield in Alpine-cold Region

以青薯6号为试验材料,氮肥、磷肥、钾肥、密度为试验因素,利用二次通用旋转组合设计,研究了不同施肥量和密度对马铃薯产量的影响。研究结果表明,对马铃薯产量影响程度大小依次为密度>磷肥>钾肥>氮肥,磷肥与氮肥、钾肥均为正互作,氮肥、钾肥之间是负互作。青薯6号在青海西宁的最佳农艺措施为,氮肥:329.6～372.7kg/hm2,磷肥:229.0～253.4kg/hm2,钾肥:84.2～101.6kg/hm2,密度64 950～69 375株/hm2,此条件下目标产量可达到39 000kg/hm2。

Using quadratic general rotation design,selecting nitrogen,phosphorus,potassium,density experimental factors to Qingshu-6 as test material,the effect of different fertilizer amount and density on potato yield were studied.The results showed that impact on potato yield in proper order of DensityPKN.There are positive interactions between phosphate and nitrogen,potassium.It＇s negative interaction between nitrogen and potassium.The best agronomic measures of Qingshu No.6 in local were nitrogen 329.6-372.7 kg/hm2,phosphorus 229.0-253.4 kg/hm2,potassium 84.2-101.6 kg/hm2,density 64 950-69 375 plants/hm2,under these conditions,can achieve the target yield of 39 000 kg/hm2.