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

BAI Ke-yu1,2**, RONG Yu-ping3, YANG Yun-hui1, LIN Chang-cun3   

  1. (1Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; 2Bioversity International East Asia office, Beijing 100081, China; 3 College of Animal Science, China Agricultural University, Beijing 100193, China)
  • Online:2013-01-10 Published:2013-01-10

Abstract: 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 Shannon-Wiener 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 significant 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 correlation with the organic matter in 10-20 cm soil layer (P>0.05). The results further proved that improving grassland biodiversity could increase the productivity and stability of grassland ecosystem.