甘薯优化施肥方案及函数模型建立

Recommendation of Optimal Fertilizer Application to Sweet Potato and Establishment of its Function Model

采用三因素二次正交旋转组合设计对氮、磷、钾肥的用量进行了定量研究。建立了甘薯产量函数模型 ,明确了模型因素效应顺序 (氮 >磷 >钾 )及最佳经济效益产量综合农艺措施 ,N为 72 .73 5kg/hm2 ,,P2 O5为 96.915kg/hm2 ,K2 O为 12 7.995kg/hm2 。

Quantitative study on the quantity of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer was conducted through three-element quadric orthogonal whirling combination design. Function model for output of sweet potato was set up as well. Meanwhile, sequences of model elements(N>P>K) and comprehensive agricultural measures (N=72.735 kg/hm 2, P 2O 5=96.915 kg/hm 2 and K 2O=127.995 kg/hm 2 ) for the output of optimal economic benefit were expected.