【摘要】 为了明确紫云英作为稻田绿肥利用的最佳翻压时期,通过田间试验,研究紫云英不同翻压时期配合常规施肥对土壤养分、水稻主要农艺性状及产量的影响。结果表明,在盛花期翻压紫云英,土壤耕层速效氮和速效钾含量,分别比常规施肥、盛花期前和盛花期后翻压紫云英高22.8%、11.0%、2.1%和23.2%、11.5%、4.4%,盛花期翻压紫云英为水稻的生长发育提供更多的氮钾养分;盛花期翻压紫云英水稻产量达到9 288.0 kg/hm2,比常规施肥、盛花期前和盛花期后翻压紫云英分别高16.3%、4.9%、3.1%。盛花期是翻压紫云英的最佳时期。更多还原

【Abstract】 To investigate the optimization incorporation period of Chinese milk vetch(Astragalus sinicus),a field experiment was conducted to study the effects of different incorporation time of Chinese milk vetch on soil nutrients,main agronomic traits in rice and rice yields.The results showed that soil available N content with Chinese milk vetch incorporated during the flowering period was 22.8%,11.0%,2.1%respectively higher than those in the treatments without the incorporation of Chinese milk vetch,with the incorporation of Chinese milk vetch during the beginning flowering period and after the flowering period,and 23.2%,11.5%,4.4%for soil available K,which indicated more nutrients was supplied by Chinese milk vetch incorporated during the flowering period.Rice yield(9 288.0 kg/hm2) in the treatment incorporated Chinese milk vetch during the flowering period was 16.3%,4.9%,3.1%respectively higher than those in the treatments without the incorporation of Chinese milk vetch,with the incorporation of Chinese milk vetch during the beginning flowering period and after the flowering period.In conclusion,the flowering period of Chinese milk vetch was asserted as optimization incorporation period.更多还原