林业科学
林業科學
임업과학
SCIENTIA SILVAE SINICAE
2014年
9期
161-166
,共6页
张于光%宿秀江%丛静%陈展%卢慧%刘敏超%李迪强
張于光%宿秀江%叢靜%陳展%盧慧%劉敏超%李迪彊
장우광%숙수강%총정%진전%로혜%류민초%리적강
海拔梯度%土壤微生物群落%神农架%磷脂脂肪酸%分布格局
海拔梯度%土壤微生物群落%神農架%燐脂脂肪痠%分佈格跼
해발제도%토양미생물군락%신농가%린지지방산%분포격국
elevation gradient%soil microbial community%Shennongjia Mountain%phospholipid fatty acid ( PLFA )%distribution pattern
To understand the microbial community,structure and its elevational patterns,four plant types at different elevations in Shennongjia Mountain,including deciduous broadleaved forest,subalpine coniferous forest,coniferous-broadleaved mixed forest, and subalpine bush, were selected to analyze the soil microbial community structure by phospholipid fatty acid ( PLFA) technique. The results showed that a total 24 PLFAs were detected in the soil and the content of total microbial PLFA,bacterial PLFA,fungi PLFA,actinomycete PLFA,and G + and G -bacterial PLFA in the soil all exhibited a single peak of distribution pattern along altitude. The PLFA content was highest in coniferous-broadleaved mixed forest soil,and lowest in subalpine bush soil. The significant difference (P <0. 05) in PLFA content in the soil was detected among subalpine coniferous forest,coniferous-broadleaved mixed forest and subalpine bush soils. Principal component analysis showed the four plant types had obviously different microbial community structure. Pearson relationship and canonical correspondence analysis indicated that the plant Shannon-Wiener index and the soil pH were significantly correlated (P < 0. 01) with the soil microbial PLFA content. Thus,plant diversity and soil pH may be the important factors in shaping the microbial elevation patterns.