水土流失对赤红壤微生物主要生理功能类群的影响  

Effects of Soil and Water Loss on Lateritic Red Soil Major Microbial Physiological Function Groups

作　　者：冯宏[1] 张志红[1] 韦翔华[1,2] 郭彦彪[1] 

机构地区：[1]华南农业大学资源环境学院,广州510642 [2]广西大学农学院,南宁530005

出　　处：《亚热带水土保持》2009年第4期24-27,共4页Subtropical Soil and Water Conservation

基　　金：国家自然科学青年基金项目(40801099;40901129)

摘　　要：对华南赤红壤丘陵坡地不同侵蚀部位土壤微生物主要生理类群进行了对比分析，结果表明：除解钾菌和纤维素分解菌外，芽孢杆菌、氨化细菌、解有机磷菌和解无机磷菌都随着植被的减少，侵蚀程度的加剧，其数量显著下降；除解钾菌因多个部位未检测到而没有明显垂直分布规律外，其他主要生理类群数量均为表层0～10cm多于10～20cm；水土流失破坏了土壤微生物原有生理类群结构，减弱了微生物在维护与提高土壤质量中的作用。It has been analyzed the soil major microbial physiological groups on different erosion position of hilly slope in the lateritic red soil region. The results show that except potassium bacteria and cellulose - decomposing microorgan- isms, the bacillus, ammonifying bacteria, organic phosphobacteria and inorganic phosphobacteria declined significantly with intensifying of soil erosion and vegetation destroyed. Except the potassium bacteria which did not appear the verti- cal distribution regularity due to the not been detected, the number of the others microorganisms in 0 - 10cm was more than in 10 -20cm. Soil original microbial physiological groups was destroyed due to the soil and water loss, so that the functions of microorganisms in improving soil quality were weakened as well.

关 键 词：水土流失 赤红壤 微生物生理类群 

分 类 号：S154.34[农业科学—土壤学]