北方农牧交错带草地生物多样性与草地生产力和土壤状况的关系  

Relationships between grassland biodiversity and primary productivity and soil condition in farming-pastoral regions of northern China

作　　者：白可喻[1,2] 戎郁萍[3] 杨云卉[1] 林长存[3] 

机构地区：[1]中国农业科学院农业资源与农业区划研究所,北京100081 [2]国际生物多样性中心东亚办事处,北京100081 [3]中国农业大学动物科技学院,北京100193

出　　处：《生态学杂志》2013年第1期22-26,共5页Chinese Journal of Ecology

基　　金：中央级公益性科研院所基本科研业务费专项(2010-29)资助

摘　　要：于2010年选择内蒙古多伦和河北的围场、沽源3个旗县10个样地的草甸草原和典型草原,探讨了北方农牧交错带草地生物多样性与草地生产力和土壤状况的关系。结果表明:3个地区的草地均匀度指数与物种丰富度指数呈显著正相关(P<0.05),且草地生物多样性指数(H)和均匀度指数与草地生产力之间呈极显著正相关(P<0.01),而与土壤含水量(0～30cm)的相关性不显著(P>0.05);草地生物多样性指数和均匀度指数与土壤全氮呈负相关(P<0.05),且与中上层土壤全氮(10～20cm)呈极显著负相关(P<0.01),而与土壤有机质之间的相关性不显著(P>0.05)。表明提高草地多样性可以增加草地生态系统的生产力和稳定性。In 2010, ten sampling sites were installed on the meadow steppe and typical steppes in the Guyuan County and Weichang County of Hebei Province and the Duolun County of Inner Mongolia, aimed to approach the relationships between the grassland biodiversity and the primary productivity and soil condition in the farming and pastoral regions of northern China. In the study areas, the ShannonWiener diversity index （H） and. Pielou evenness index of the grasslands were significantly positively correlated （P〈0.05） , and the H and Pielou evenness index had signifi cant positive correlations with the primary productivity （ P〈0.01 ）. However, there was no significant correlation between the H and soil water content （ P〉0.05 ）. The H and Pielou evenness index had significant negative correlations with the total nitrogen in 0-30 cm soil layer （ P〈0.05 ）, and the H had a significant negative correlation with the total nitrogen （ P〈0.01 ） but less corre lation with the organic matter in 10-20 em soil layer （P〉0.05）. The results further proved that improving grassland biodiversity could increase the productivity and stability of grassland ecosys tem.

关 键 词：草地生物多样性 初级生产力 土壤因子 农牧交错带 

分 类 号：S162[农业科学—农业气象学]