%0 Journal Article
%T The study on biomass composition dynamics of community in degenerated steppe of Leymus chinensis after shallow ploughing<br>退化羊草草原在浅耕翻处理后植物群落生物量组成动态研究
%A BAOYIN Taogetao
%A LIU Mei-ling
%A <br>宝音陶格涛
%A 刘美玲
%J 自然资源学报
%D 2003
%I 
%X Grassland is a kind of important resources.With the increase in population and the over-grazing,the grassland all over the world had been degenerated.In order to find a feasible method to recover the degenerated grassland,we used the method of shallow ploughing to study the biomass composition dynamics of community in Degenerated Steppe of Leymus chinensis.Many statistical methods were used to study the changing laws of biomass composition of degenerated steppe of Leymus chinensis17years after shallow ploughing.The results showed that the increase in over-ground biomass have a singlet regression with recovering years after shallow ploughing.The biomass was affected more by the composition of community than precipitation during the prophase and metaphase of succession.The biomass proportion of Gramineae was dominant in all families,but during prophase and meta -anaphase of recovering the biomass proportions of Chenopodiacae,Compositae and Rosaceae raised,and they all had negative correlations with Gramineae.As far as biomass of different life forms was concerned,the biomass of rhizome grass was more than90%of the total productivity.The primary productivity and the changing laws between years of community had correlation with the over -ground biomass of perennial rhizome grass and perennial forbs prominently.From the biomass of community in different water ecological types,the biomass of xerophilous plant was dominant of all.Over -ground total productivity of community had obviously positive correlation with the over-ground biomass of xerophilous plant.The index of diversity of community appeared an open-up parabola after shallow ploughing.The biomass of Gramineae,Compositae,Rosaceae,rhizome grass,bunch grass and taproot forbs had obviously linear correlation with the index of diversity of community.So it could be seen that the method of shallow ploughing could improve the productivity and quality of grassland.
%K degenerated steppe of L
%K chinensis
%K shallow ploughing
%K productivity dynamics
%K functional group composition<br>羊草草原
%K 草原退化
%K 植物群落
%K 生物量
%K 组成
%K 变化规律
%K 浅耕翻
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=4DCB9A3AF3395AF0101DE5302EF3C300&aid=547B580457D58EB0&yid=D43C4A19B2EE3C0A&vid=13553B2D12F347E8&iid=94C357A881DFC066&sid=B34BDD6A690A04C0&eid=CEFF71AEB051114C&journal_id=1000-3037&journal_name=自然资源学报&referenced_num=12&reference_num=19