羊草种群能量生殖分配的研究  

Energy allocation to growth and reproduction in Leymus chinensis population.

作　　者：王仁忠[1] 

机构地区：[1]东北师范大学国家草地生态工程实验室,长春130024

出　　处：《应用生态学报》2000年第4期591-594,共4页Chinese Journal of Applied Ecology

基　　金：国家教委跨世纪优秀人才培养计划基金项目;国家自然科学基金重大资助项目!(39899370 )

摘　　要：对羊草种群能量生殖分配规律研究表明 ,在羊草种群中 ,各构件热值的大小顺序为穗 >营养枝叶鞘 >生殖枝叶鞘 >营养枝叶 >营养枝茎 >生殖枝茎 >生殖枝叶 >凋落物 ;营养生长和生殖生长的能量分配比例的大小顺序为营养枝 >根茎 >凋落物 >生殖枝 ;各构件能量分配比例的季节动态也有差异 .在羊草种群的生殖枝构件中 ,茎和叶鞘的分配比例较大 ,而穗和叶的能量分配比例较小 .Studies on energy allocation to growth and reproduction in Leymus chinensis population show that the average calorific value of modulus was decreased in the order of ear>leaf sheath of vegetative shoot>leaf sheath of sexual shoot>leaf of vegetative shoot>stem of vegetative shoot>stem of sexual shoot>leaf of sexual shoot>litter,and the energy allocation rate of vegetative and reproductive growth was in the order of vegetative shoot>rhizome>litter>sexual shoot.The dynamics of energy allocation rate of modulus was different with seasons.Among all reproductive stem modulus,the rate of energy allocation to stem and leaf sheath of sexual shoot was higher than that to ear and leaves.

关 键 词：羊草种群 能量分配 生殖生态学 植物构件 

分 类 号：S812[农业科学—草业科学]