不同退化程度下矮嵩草和高山嵩草无性系的种子生产力与分株植物量  

Changes of plant biomass and seed productivity in Kobresia humuilis and K.pygmaea under different degenerative gradations in alpine meadow

作　　者：李海宁 李希来[2] 杨元武[2] 马桂花[2] 马桂祥[2] 

机构地区：[1]青海省饲料兽药监察所,青海西宁810003 [2]青海大学农牧学院草业科学系,青海西宁810003

出　　处：《湖北农业科学》2003年第5期84-87,共4页Hubei Agricultural Sciences

基　　金：国家教育部骨干教师项目<嵩草草甸退化演替与"黑土滩"恢复对策的研究>部分内容

摘　　要：对不同退化程度下的矮嵩草和高山嵩草无性系繁殖特性与分株植物量进行了初步研究,结果表明,不同退化程度下两种嵩草有性繁殖能力较弱,种子生产能力低,其中中度退化草地上高山嵩草每有效穗最高只产生2粒种子,重度退化草地矮嵩草每有效穗最高只产生3 6粒种子。矮嵩草无性系分株生物量中根茎>叶>根,高山嵩草根茎>根>叶,地下生物量>地上生物量。The plant biomass and seed production of Kobresia pygmaea and K.humuilis under different degenerative gradations in alpine meadow were studied.The results showed that the clonal propagation ability of two species were very stronger than sexual propagation in seed . the sexual propagation ability of clonal K.pygmaea and K.humuilis were week in which seeds were only two per effective rea of plant in medial degenerative gradation and heavy gradation only 3.6. The sequence of ramet biomass of clonal K.humuilis was rhizomes>leaves>roots and that of K.pygmaea  was rhizomes>roots>leaves, their underground biomass are bigger than the aboveground biomass.

关 键 词：矮嵩草 高山嵩草 无性系 种子生产力 分株植物量 繁殖特性 生产能力 

分 类 号：S54[农业科学—作物学]