模拟条件下布氏田鼠对草原植被的作用——植被生物量的影响  

Brandt′s voles Impact of Brandt′s voles on grassland vegetation under simulated conditions 1——Impact on vegetation biomass

作　　者：秦姣[1] 贠旭疆[2] 苏红田[2] 施大钊[1] 杨建宏 

机构地区：[1]中国农业大学农学与生物技术学院,北京100094 [2]全国畜牧总站,北京100026 [3]河北万全县植物保护站,河北万全076250

出　　处：《草业科学》2009年第6期140-145,共6页Pratacultural Science

基　　金：国家十一五科技支撑项目(2006BAD16B04);牧区害鼠发生为害规律及监控技术研究与示范(2005BA529A05)

摘　　要：2007年5-10月在模拟条件下研究了不同密度的布氏田鼠Lasiopodomys brandtii啃食对草原植被生物量、植物补偿生长量的影响。结果表明:1)植被生物量与布氏田鼠密度关系呈现了"低—高—低"的变化趋势;鼠密度每100 m2<5只时,植被生物量呈增加趋势。鼠密度每100 m2为5只时,其植被生物量增长达到最高值,随鼠密度的增加,植被生物量下降。2)植物补偿生长量与布氏田鼠密度相关呈单峰型曲线,鼠密度每100 m2为8只时植被的补偿生长量最高。3)植被生长可承受的鼠密度每100 m2为4只(折合400只/hm2),鼠密度每100 m2≤4只时刺激植物生长,且可稳定植被群落结构。The impact of Brandt＇ s voles （Lasiopodomys brandtii） with different densities on aboveground biomass and compensation growth of grassland were studied under simulated conditions in Xuanping Country of Hebei Province from May to October, 2007. The results indicated that 1） the relationship between the vegetation aboveground biomass and vole density showed a parabolic curve, the vegetation biomass increased while the vole density was less than 5 voles/lO0 mz and it reached the peak value at the density of 5 voles/100 m2, but it decreased while the density was over 5 voles/100 m2 ;2） the relationship between compensation growth and vole density showed one single peak curve and the compensation growth reached the highest while the vole density was 8 voles/lO0 m2; 3） the vole density that vegetation could stand was 4 voles/100 m2 （or 400 voles/hm2） and the plant growth could be stimulated and the vegetation community structure could be stabilized while the density was less than 4 voles/100 m2.

关 键 词：布氏田鼠 植被生物量 补偿生长量 

分 类 号：S812[农业科学—草业科学]