摘要
盆栽条件下研究遮阴对弋江种、信阳种和浙紫5号3个不同品种紫云英生长及物质养分积累的影响,为"水稻-紫云英套播"选择适宜紫云英品种提供依据。试验结果表明,遮阴提高了紫云英出苗数,但幼苗死亡率则随遮阴度的增加而升高。生长前期,紫云英株高随遮阴度的增加而增加,而单株复叶数、表观叶面积、叶绿素含量(SPAD值)均随遮阴度的增加而减小;随生育进程的推进,各指标在处理间的差异缩小。不同遮阴程度对3个品种鲜草产量产生明显影响,不遮阴和遮阴40%时弋江种产量最高,遮阴75%时浙紫5号的产量最高。植株碳含量随遮阴度增加有下降趋势,而氮、磷、钾含量呈上升趋势。不同遮阴条件下品种间的养分积累量也存在差异,不遮阴处理的碳、磷、钾积累量以弋江种最高,氮积累量以信阳种最高,遮阴40%的碳、磷、钾积累量最高的是浙紫5号,氮积累量最高的是弋江种,遮阴75%时各养分积累量均以浙紫5号最高。综合考虑鲜草产量和养分积累量,高产稻田套播紫云英应优选浙紫5号。
In order to choose the suitable variety of Chinese milk vetch for the interplant system in the paddy,the pot experiment was carried out to study the effect of shading on the growth and nutrients accumulation of three varieties of Chinese milk vetch which named Yijiang,Xinyang and Zhezi.The results showed that the survival seedlings under shading were more than no-shading,the seedling mortality increased as the shading degree increased.In the early growing stage,the shoot height increased as the shading degree increased,but compound leaves per plant,apparent leaf area and SPAD value decreased as the shading degree increased.As the growth period propelled,the difference among the treatments of the indexes diminished.The shading degree had significant influence on the yield of the three varieties,the yield of Yijiang were higher than other varieties under the no-shading and 40% shading condition,the yield of Zhezi were highest under the 75% shading condition.The content of carbon decreased as the shading degree increased,but the N,P,K contents increased as the shading degree increased.Shading also had influence on the nutrients accumulation of the three varieties,the C,P,K accumulation of Yijiang and the N accumulation of Xinyang were highest under the no-shading condition,the C,P,K accumulation of Zhezi and N accumulation of Yijiang were highest under the 40% shading condition,all the nutrients accumulation of Zhezi were highest under 75% shading condition.In conclusion,Zhezi was suitable interplant in the paddy.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2011年第5期69-75,共7页
Soil and Fertilizer Sciences in China
基金
公益性行业(农业)科研专项经费项目(200803029)
关键词
遮阴
紫云英
品种
产量
养分含量
养分积累量
shading
Chinese milk vetch（Astragalus sinicus L.）
variety
yield
nutrient content
nutrient accumulation
