摘要
本研究旨在菜地土壤磷、钾富集条件下,评估磷、钾肥料减施的效果。选择土壤有效磷378 mg/kg和速效钾614 mg/kg的菜地,开展连续3茬蔬菜的9个不同氮、磷、钾减施处理的小区试验。结果表明,减少氮、磷、钾肥用量可降低蔬菜中对应养分元素含量,减少磷、钾肥的投入可有效降低土壤有效磷和速效钾水平;不施用或少施磷、钾肥对蔬菜产量影响不明显,但不施氮肥可显著降低蔬菜的产量;有机肥替代磷钾肥处理的蔬菜产量高于常规施肥;氮是限制蔬菜生长的主要营养元素,短期不施或少施磷、钾肥,在保持产量不下降的同时可有效减少土壤中磷、钾的积累,降低磷的流失风险。
In order to understand the effect of phosphorus and potassium reduction in vegetable fields rich in phosphorus and potassium,the plots with 378 mg/kg available P and 614 mg/kg available K were selected to carry out nine different nitrogen,phosphorus and potassium reduction treatments for three consecutive crops.The results showed that reducing the amount of nitrogen,phosphorus and potassium fertilizer could reduce the contents of the corresponding nutrient elements in vegetables.Reducing the input of phosphorus and potassium fertilizer could effectively reduce the levels of available phosphorus and available potassium in soil.No or less application of phosphorus and potassium had no obvious effect on vegetable yield,but no application of nitrogen could significantly reduce vegetable yield.The vegetable yield of organic fertilizer replacing phosphate and potassium fertilizer was higher than that of conventional fertilization.Nitrogen was the main nutrient element that restricted the growth of vegetables.No or less application of phosphorus and potassium fertilizer in the short term could effectively reduce the accumulation of phosphorus and potassium in soil and reduce the risk of phosphorus loss while keeping the yield from decreasing.
作者
楼玲
袁杭杰
王京文
王忠
章明奎
LOU Ling;YUAN Hangjie;WANG Jingwen;WANG Zhong;ZHANG Mingkui(Service Station of Eco-agriculture and Plant Protection in Yuhang District,Hangzhou 310023;Hangzhou Agricultural Technology Extension Center,Hangzhou 310020;Agricultural Technology Extension Center in Linping District,Hangzhou 311100;College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058)
出处
《农学学报》
2025年第3期19-23,共5页
Journal of Agriculture
基金
杭州市农业科技协作与创新攻关项目“蔬菜连作障碍治理技术研究与示范”(202209SX15)。
关键词
设施蔬菜
磷钾富集
蔬菜产量
土壤养分
减量施肥
有机肥
养分管理
facility vegetables
enrichment of phosphorus and potassium
vegetable production
soil nutrients
reduced fertilizer
organic fertilizer
nutrient management
