干旱区生态环境知识资源中心(Arid): 短花针茅草原不同载畜率对植物多样性和草地生产力的影响

Arid

	短花针茅草原不同载畜率对植物多样性和草地生产力的影响
其他题名	Effects of plant species diversity and productivity under different stocking rates in the Stipa breviflora Griseb. desert steppe
	韩国栋; 焦树英; 毕力格图; 敖登高娃
ISSN	1000-0933
出版年	2007
卷号	27 期号:1 页码:182-188
中文摘要	采用不同载畜率的围栏放牧试验，研究了内蒙古高原荒漠草原亚带短花针茅（Stipa breviflora Gfiseb．）草原群落在不同载畜率水平植物多样性变化规律和对草地生产力的影响。研究结果表明：在2a的放牧过程中，不同载畜率植物多样性指数的均值随年度的增加有降低的趋势，但年度间差异未达到显著水平；不同年度内，植物多样性指数均在载畜率1．027只羊／（hm~2·a）附近出现峰值；且载畜率为1．027只羊／（hm~2·a）时植物补偿性生长最高，是最理想的载畜率水平。研究结果支持群落物种多样性与生产力相关格局中的负二次函数关系的单峰格局模型，即中等生产力水平物种多样性最高。
英文摘要	The experiment was conducted in the Stipa breviflora Griseb. desert steppe, Inner Mongolia （41 °47＇17＂N, 111°53＇46＂E, 1450m sea level） from 2002 to 2004. The objectives were to test the integrated influence of different stocking rates on species diversity and productivity with fenced sheep grazing. The results showed that the species diversity changed in the second year under different stocking rates, and the average species diversity decreased with the year, but there was no significance. The maximum species diversity occurred at a stocking rate of 1. 027 sheep/（ hm~2· a）. The aboveground net primary productivity of the plant species occurred with equal-compensatory growth when the stocking rate was below 1. 027 sheep/（hm~2 ·a）, but it decreased rapidly when the stocking rate increased. Therefore, the optimum stocking rate is 1. 027 sheep/（hm~2·a） in this kind of steppe. The results in this study support the single-peak model with minus quadratic function in the relationship between species biodiversity and productivity of the plant community, that is, that maximum species diversity occurs at the moderate plant productivity.
中文关键词	植物多样性 ; 载畜率 ; 短花针茅草原 ; 生产力
英文关键词	plant species diversity stocking rates Stipa breviflora Griseb desert steppe productivity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:2735070
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221317
作者单位	内蒙古农业大学生态环境学院, 呼和浩特, 内蒙古 010019, 中国
推荐引用方式 GB/T 7714	韩国栋,焦树英,毕力格图,等. 短花针茅草原不同载畜率对植物多样性和草地生产力的影响[J]. 内蒙古农业大学,2007,27(1):182-188.
APA	韩国栋,焦树英,毕力格图,&敖登高娃.(2007).短花针茅草原不同载畜率对植物多样性和草地生产力的影响.,27(1),182-188.
MLA	韩国栋,et al."短花针茅草原不同载畜率对植物多样性和草地生产力的影响".27.1(2007):182-188.