欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
选取内蒙古典型草原大针茅为主要研究对象,研究割草和放牧干扰对其根际与非根际土壤有机碳、全氮、有效氮、全磷、有效磷含量以及微生物数量的影响.结果表明：在割草和放牧干扰下,根际土壤有机碳、全氮、有效氮含量均有不同程度的减少,根际截存效应减弱;土壤全磷由于固定性强不易向植物根部聚集,土壤全磷的根际效应不明显;土壤有效磷异质性较大,在放牧和割草干扰下有不同程度的变化,但根际和非根际间差异不显著;放牧干扰显著减少了土壤微生物的数量;土壤养分的变化与土壤微生物数量的变化关系密切,细菌和真菌的数量变化可能对土壤养分的影响更大;相对于割草,放牧干扰更易造成根际土壤养分的流失及微生物数量的减少.
英文摘要：
This study conducted experiments using Stipa grandis,the dominant species of the typical steppe in Inner Mongolia. The research explored the different effects of mowing and grazing on organic carbon,total nitrogen,available nitrogen,total phosphorus and available phosphorus in rhizosphere and bulk soil. The results showed that： Both mowing and grazing inhibited assemble and storage capacity of rhizosphere,and decreased the organic carbon,total nitrogen,and available nitrogen contents in rhizosphere soil. The rhizosphere effect on total phosphorus in soil was found to be insignificant because of its high immobility. Available phosphorus in soil was distributed heterogeneously. Available soil phosphorus under mowing and grazing changed but the difference was not significant between rhizosphere and bulk soil. Grazing drastically reduced the number of soil microbes. The availability of soil nutrients was significantly correlated with soil microbial numbers.The status of soil nutrients could be more closely aligned with the change in bacteria and fungi.Grazing brought about greater soil nutrient loss and soil microbe loss than did mowing.
同期刊论文项目
同项目期刊论文
Assessment of vulnerability to climate change in Inner Mongolia steppe at a county scale from 1980 t
The biodiversity and stability of alpine meadow plant communities in relation to altitude gradient i
Income and Expenditure of the Herdsman in Inner Mongolia Autonomous Region: A Case Study of Xianghua
Vegetation Community Convergence of Pastoralist` Pasture of Different Economic Levels in Desert Step
Complexity Thinking: Problems and Confusions of Eco-economic Governance of Northern Grassland in Chi
期刊信息
位置：