摘要
在长江二号多花黑麦草不同播量梯度下,研究出苗率、分蘖数、密度、株高和生物量等指标,验证竞争-密度、密度-产量等效应。结果表明:在生长前期,播量大的出苗率反而低;在生长后期,高密度小区的竞争更为激烈,对资源(包括空间)的争夺时,小个体植株首先受到死亡的威胁,随着时间的推移,个体死亡率增大,使不同播量下多花黑麦草的密度基本趋于一致;同时在不同播量下同样单位面积下的多花黑麦草最终产量基本相同,符合最终恒值产量法则。
In this paper the growth of the Yangtze River No. 2 ryegrass was examined under different seeding density, through which the competition - density, the density - yields effect were confirmed. The result indicated that, In the earlier growth period, the germination rate is low under high density of seedling; In the later growth period, the competition are more intense in high density plots, the small individual face to death firstly, along with time passing, the individuals died more and more, the community come to a stability density even under different seeding density. At the same time, the yields are almost same under different seeding densities, conforms to the finally permanent value output principle.
出处
《贵州畜牧兽医》
2014年第3期63-67,共5页
Guizhou Journal of Animal Husbandry & Veterinary Medicine
基金
黔科合重大专项[2011]6009
贵州省年度农业攻关项目
黔科合NY字[2009]3090
贵州省农科院项目
黔农科院专项[2010]058号
关键词
多花黑麦草
密度
株高
产量
Annual Ryegrass
Density
Height
Yields
