矮嵩草无性系对不同放牧强度的生长反应  

The growth response of Kobresia humili clone on different stocking intensity

作　　者：李希来[1] 朱志红[1] 杨元武[1] 张静[1] 宋维军[1] 

机构地区：[1]青海大学农牧学院,青海西宁810003

出　　处：《青海大学学报（自然科学版）》2002年第4期4-6,共3页Journal of Qinghai University(Natural Science)

基　　金：国家自然科学基金项目 (3 9960 0 5 3 );<高等学校骨干教师资助计划>项目

摘　　要：对不同放牧强度下 (放牧强度分别为每公顷 0、2、4、8只二龄藏羊 )高寒草甸矮嵩草无性系分株组成和克隆生长进行了研究。结果表明 :随着放牧强度的增加 ,单位面积 ( 1 0cm2 ×1 0cm2 )矮嵩草无性系、营养和生殖分株种群生物量总体呈减少趋势 ,生殖分蘖中种子数呈增加趋势 ;矮嵩草无性系营养分株生物量所占比例均小于生殖分株 ,分别为 35 66%、35 75 %、38 2 2 %和 40 40 %。营养分株中分蘖数量和生物量随放牧强度的增加呈上升趋势 。The clonal composition and growth of Kobresia humilis under different stocking intensities(0,2,4,8 sheeps/hm 2) were studied in Alpine Meadow.The results were showed that the aboveground biomass of clone,vegetative and flowering ramet under standard unit(10×10cm 2) decreased,but the seed numbers of vegetative tiller per ramet increased as the increase of stock intensity.The ratio of aboveground biomass of vegetative ramet to flowering were less for 35 66%,35 75%,38 22% and 40 40% respectively.The tiller numbers and the biomass of the vegetative ramet increased and the leaves no obviously changed as the increase of stock intensity.

关 键 词：矮嵩草 放牧强度 无性系 克隆生长 

分 类 号：S812.8[农业科学—草业科学]