摘要
依托测土配方技术,根据土壤供肥能力、水稻需肥规律及目标产量等,采取以土定产、以产定肥、施用缓释肥等原则,在制定科学合理的施肥方案基础上,探究聚氨酯包膜型缓释肥对婺城地区双季稻产量及化肥利用率的影响.试验结果显示,早稻全肥处理目标产量为 6 000.0 kg·hm-2,实际产量为 6 405.0 kg·hm-2,化肥利用率分别为氮 44.9%、磷 25.2%、钾 49.1%;晚稻全肥处理目标产量为 8 250.0 kg·hm-2,实际产量为8 707.5 kg·hm-2,化肥利用率分别为氮 43.6%、磷 27.8%、钾 51.6%.聚氨酯包膜型缓释肥是一种优良的缓释肥,施用聚氨酯包膜型缓释肥双季稻氮磷钾平均利用率分别达 44.3%、26.5%和 50.4%,建议施用聚氨酯包膜型缓释肥替代普通复合肥.
Abstract
Based on the scientific and reasonable fertilization scheme,according to supply capacity of soil nutrient,fertilizer requirement regularity of rice,and target yield,this experiment adopted the principles of soil to yield determination,yield to fertilization requirement and application of slow-release fertilizer to explore the influence of polyurethane coated slow-release fertilizer on the yield and fertilizer use efficiency of double-cropping rice in Wucheng Distrist,depending on the formulation technology of soil testing.The results showed that for the early rice,the target yield and actual yield were 6 000.0 kg·hm-2,and 6 405.0 kg·hm-2,respectively,under full fertilizer treatment.The N,P and K use efficiencies were 44.9%,25.2%and 49.1%,respectively.For the late rice,the target yield and actual yield were 8 250.0 kg·hm-2,and 8 707.5 kg·hm2,respectively,under full fertilizer treatment.The N,P,K use efficiencies were 43.6%,27.8%and 51.6%,respectively.Polyurethane coated slow-release fertilizer is an excellent slow-release fertilizer.The average N,P and K use efficiencies were 44.3%,26.5%and 50.4%,respectively,by applying polyurethane coated slow-release fertilizer.Thus,it is recommended to use polyurethane coated slow-release fertilizer instead of general compound fertilizer.
基金项目
金华市婺城区肥料田间试验项目(TY2021-FW121-ZFCG121)
维普
万方数据