%0 Journal Article
%T Comparison of microbial biomass and community structure of rhizosphere soil between forest and shrubbery in karst ecosystems<br>喀斯特生态系统中乔木和灌木林根际土壤微生物生物量及其多样性的比较
%A WANG Xin-zhou
%A HU Zhong-liang
%A DU You-xin
%A LIU Yong-zhuo
%A LI Lian-qing
%A PANG Gen-xing
%A <br>王新洲
%A 胡忠良
%A 杜有新
%A 刘永卓
%A 李恋卿
%A 潘根兴
%J 土壤
%D 2010
%I 
%X The degradation of karst ecosystem in Southwest China has been a serious ecological problem. To research the effects of different vegetation types on microbial biomass and bacterial community structures of rhizosphere soil, we selected the dominant tree species, Quercus fabri, Platycarya longipes in forest and Pyracantha fortuneana, Zanthoxylum planispinum in shrubbery, in two typical karst ecosystems. The results showed that microbial biomass carbon and nitrogen of rhizosphere soil in forest were higher than those in shrubbery, and the effects of the dominant tree species of Quercus fabri and Platycarya longipes in forest was more obvious compared to shrubbery. Bacterial diversity indexes of rhizosphere soil of dominant tree species in forest were significantly higher than those of bulk soil by the root exudates, but in shrubbery, there was no significant difference in both microbial biomass and diversity indexes between rhizosphere soil and bulk soil. It suggests that the vegetation succession could affect the cycle of substance and energy among plant-microbe-soil system by changing the characters of soil microbe, even affect the stabilization and health of karst ecosystems.
%K Karst ecosystem
%K Rhizosphere soil
%K Microbial biomass
%K Bacterial community
%K DGGE<br>喀斯特生态系统
%K 根际土壤
%K 微生物生物量
%K 细菌群落
%K DGGE
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=56F69E970C6E5190CDB409D28DD0E3C6&aid=CB128FE6C68A5DE0E5C9337B440FC65C&yid=140ECF96957D60B2&vid=ECE8E54D6034F642&iid=0B39A22176CE99FB&sid=A1266CF37D675CF1&eid=F8035C8B7D8A4264&journal_id=0253-9829&journal_name=土壤&referenced_num=1&reference_num=34