不同还田条件下稻田紫云英氮素释放规律及效应  

Effects of N-release from Astragalus sinicus in Different Applied Conditions

作　　者：唐杉[1,2] 王允青[1,2] 曹卫东[3] 赵决建 张智[5] 吴立蒙 吴文革[6] 

机构地区：[1]安徽省农业科学院土壤肥料研究所,安徽合肥230031 [2]安徽养分循环与资源环境省级实验室,安徽合肥230031 [3]中国农业科学院资源区划所,北京100081 [4]安徽省桐城市农技中心,安徽桐城231400 [5]安徽省桐城市吕亭镇农技站,安徽桐城231400 [6]安徽省农业科学院水稻研究所,安徽合肥230031

出　　处：《安徽农业科学》2013年第7期2945-2947,共3页Journal of Anhui Agricultural Sciences

基　　金：公益性行业(农业)专项(201103005;201203032);安徽省农业成果转化(12040302003);安徽省农科院水稻创新团队(11C0101)

摘　　要：[目的]探明不同还田方式下紫云英氮素释放规律,为合理施用紫云英、减少化肥用量提供依据。[方法]采用网袋腐解方法,结合田间水稻试验,定量研究紫云英在不同还田条件下氮素释放规律、效应。[结论]在紫云英腐解的不同时期,翻压量始终是影响紫云英氮素释放的重要因素,而是否施肥、移栽水稻对紫云英氮素的腐解释放也起重要的调节作用。在大田试验中,紫云英供氮处理的肥效在翻压前期弱于纯化肥,中期强于纯化肥,最终对水稻生长发育无显著影响。[Objective] In order to provide the basis for using Astragalus sinicu instead of fertilizer partly,the regular pattern of N-release A.sinicu in different applied conditions were studied.[Method] By using decomposing in mesh bag,combined with field rice experiment,the effect and law of N-release from A.sinicu in different applied conditions were quantitatively studied.[Conclusion] The quantity of plowed A.sinicu is always the most important factor of N-release,the fertilizer application and the growth of rice also have effect.In the field experiment,the N released from A.sinicu was less effective than fertilizer before 30 d,but more effective after 30 d.There are no significant difference between N from A.sinicu and fertilizer at last.

关 键 词：紫云英 早稻 腐解 氮素释放 

分 类 号：S541.3[农业科学—作物学]