呼伦贝尔草原生物量变化及其与环境因子的关系  

Variation of grassland biomass and its relationships with environmental factors in Hulunbeier, Inner Mongolia

作　　者：郑晓翾[1] 赵家明 张玉刚 吴雅琼[1] 靳甜甜[1] 刘国华[1] 

机构地区：[1]中国科学院生态环境研究中心城市与区域生态国家重点实验室 [2]内蒙古自治区呼伦贝尔市环境科学研究所,内蒙古呼伦贝尔021008

出　　处：《生态学杂志》2007年第4期533-538,共6页Chinese Journal of Ecology

基　　金：国家重点基础研究发展项目(2002CB412503);国家自然科学基金委员会创新群体资助项目(40321101)

摘　　要：根据呼伦贝尔草原大范围草地生物量的调查和实验数据,分析了该地区草地生物量的动态变化规律及其与环境因子的关系。结果表明,沿着环境梯度,不同区域草地生物量差异显著,其变化与水分、温度变化关系不显著,与0～20cm土层的土壤有机碳含量呈正相关,而与土壤容重呈负相关。逐步多元回归表明,土壤有机碳是制约生物量变化的主要因素,可能是当地草地利用方式使土壤养分成为制约草地植物生长的限制因子,从而影响草地生物量。Based on field investigation and experimental data, the variation pattern of grassland biomass and its relationships with environmental factors in Hulunbeier of Inner Mongolia were studied. The results indicated that there existed a significant difference in the biomass of plant communities along an environmental gradient. The variation of the biomass had no significant correlation with precipitation and air temperature, but positively correlated with soil organic carbon content in 0-20 cm layer and negatively correlated with soil bulk density. According to multiple regression, the main factor restricted the biomass was soil organic carbon. The utilization patterns of grassland in study area possibly made the soil nutritive condition become the limiting factor on the growth of grassland vegetations, which in turn affected grassland biomass.

关 键 词：生物量 变化规律 环境因子 

分 类 号：S812[农业科学—草业科学]