摘要
老芒麦同龄种群在 4个播种密度 (Ⅰ :2 0 0、Ⅱ :40 0、Ⅲ :80 0、Ⅳ :1 60 0株 /m2 )处理下 ,单株分蘖数、单株叶片数在三年试验观察期内存在差异 ,并随密度增加而减少 ;单株分蘖死亡率及单株叶片死亡率在播种当年及第二年存在差异 ,随密度增加而增加 ,但在播种第三年差异消失。在同一密度下 ,单株分蘖数。
From study of Elymus sibiricus sibiricus.L same year community in four density of sowing(Ⅰ200, Ⅱ400, Ⅲ800, Ⅳ1600 plants/m 2), The results showed that the number of single plant tiller and leaves existed difference during three years, and decreased as sowing density increasing. And death rate of tiller and leaves existed difference in the year and next year, which increased as density of sowing increasing. But difference was disappeared during the third year in the same density, the death rate of the number of single plant tiller and leaves were increased as time on under same density.
出处
《青海草业》
2001年第2期9-11,16,共4页
Qinghai Prataculture
关键词
同龄种群
密度制约
老芒麦
same year community
density restrain
Elymus sibiricus
