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本文探讨了花生-甘薯轮作制中钾肥和磷钾肥施肥模型的建立方法。通过裂区田间试验设计,建立了钾肥和磷钾肥当季施肥模型和甘薯后效模型以及甘薯当季施肥模型。3个钾肥试验和2个磷钾肥试验结果表明,上述模型能很好地拟合田间试验结果。后效模型可计算出花生磷钾肥最佳施用量下对甘薯的后效产量,甘薯当季肥效模型可求得扣除肥料残留效应后的磷钾肥最佳施用量,降低了甘薯推荐施肥量,提高了施肥效益。
This article explored the peanut-sweet potato rotation system in potash and phosphorus-potassium fertilization model establishment method. Through split field experiment design, established the seasonal fertilization model of potassium and phosphorus and potassium and sweet potato after-effect model and sweet potato seasonal fertilization model. The results of three potash tests and two P and K tests show that the above model can well fit the field test results. After-effect model can calculate the optimum amount of peanut phosphate fertilizer application of sweet potato after the effect of production, sweet potato season fertilizer efficiency model can be obtained after the removal of fertilizer residues of phosphorus and potassium fertilizer to optimize the amount of fertilizer to reduce the recommended amount of sweet potato to improve Fertilizer benefits.