不同绿肥翻压还土后植烟土壤主要养分动态变化

摘要

为探索不同绿肥翻压还土对土壤养分的影响，采用大田试验研究了光叶紫花苕、箭舌豌豆、紫云英、普通黑麦草、冬牧70、满园花等6种绿肥翻压后土壤主要养分含量的动态变化。结果表明：（1）绿肥翻压还土能够提高土壤有机质、碱解氮、有效磷和速效钾含量，分别为2.64％～13.33％、19.25％～40.99％、2.32％～18.75％、47.94％～76.50％；（2）不同绿肥品种以普通黑麦草提高土壤有机质幅度最大，以箭舌豌豆提高土壤碱解氮和有效磷幅度最大，以紫云英提高土壤速效钾幅度最大；（3）不同绿肥种类以禾本科绿肥提高土壤有机质的效果较好，以豆科绿肥提高土壤碱解氮、有效磷和速效钾的效果最好。%In order to investigate the effect of different green manure application on soil main nutrient,a field experiment was conducted with vicia villosa,common vetch,milk vetch,ryegrass,Dongmu-70,radish.The results showed that (1 ) green manure application could improve the contents of soil organic matter,available N,available P,available K by 2.64%-13.33%,19.25%-40.99%,2.32%-18.75%,47.94%-76.50% respectively.(2)The influence of ryegrass was biggest on the soil organic matter among different green manure varieties,and common vetch on available N and available P,and milk vetch on available K.(3)The influence of graminaceous green-manure was biggest on the soil organic matter among different green manure types,while leguminous green manure on soil available N,available P,available K.