基于“3414”试验模型的沿海砂质土壤马铃薯氮、磷、钾效应研究

2009年在福建省平潭县具有代表性的土壤类型上进行了马铃薯"3414"试验,结果表明:施用氮肥的效应最好,增产达101.5%;磷肥增产16.7%;钾肥增产16.1%。采用二次多项式逐步回归的方法对试验产量结果进行肥料效应回归模型模拟,得出的3点试验田肥料效应回归模型全部为氮、磷、钾三元二次多项式回归模型,经显著性检验达到极显著水平,由此提出了马铃薯的最佳施肥量。

Research on Effects of N, P and K Fertilizer on Potato in Coastal Sandy Soil Based on "3414" Test Model

Field"3414"experiments in N,P and K fertilizer effects on potato were conducted in Pingtan county in 2009.The results indicated that nitrogen fertilizer application had the best yield-increasing effect on potato(yield-increasing rate 101.5%),followed by phosphor fertilizer(16.7%) and potassium fertilizer(16.1%).The quadratic polynomial regressive models of fertilization effects in three experimental plots were simulated.According to the constructed models,the optimum application rate of N,P and K fertilizer for potato was put forward.