土壤学报2012，Vol.49Issue(5)：1003-1011,9.
田间条件下小麦和玉米秸秆腐解过程中微生物群落的变化——BIOLOG分析
CHANGES OF MICROBIAL COMMUNITIES DURING DECOMPOSITION OF WHEAT AND MAIZE STRAW:ANALYSIS BY BIOLOG
摘要
Abstract
The study on microbial mechanism of straw decomposition process is the theoretical basis of regulation straw returning and enhancing of fertility on farmland. Reciprocal translocation experiment was set to investigate the changes of metabolic activity ( expressed as AWCD, Average Well Color Development) during decomposition in Phaeozem, Cambisol and Acrisol under cold temperate, warm temperate and mid-subtropic climate conditions. Litter bag method avoiding soil entering was used to identify microbial communities responsible for straw decomposition. The results showed that the AWCD decreased with the increase of temperature and rainfall during half and one year decomposition. AWCD in 0. 5 year showed that Hailun (0.765 ±.060) > Fengqiu (0.737 ±. 165) > Yingtan (0.326 ±.076) , AWCD in 1 year showed that Hailun (0. 630 ±. 092) > Fengqiu (0. 319 ±. 096) > Yingtan (0. 291 ±. 029). However the tendency was weak after two-year decomposition. Climate condition is the key factor that influenced the microbial carbon utilization activity. In addition, by principal component analysis, the microbial metabolic properties in Hailun and Fengqiu were quite different from that in Yingtan after 0. 5 year, and the microbial metabolic properties in Fengqiu and Yingtan were quite different from that in Hailun. After two-year decomposition the microbial metabolic properties became similar under different climate conditions, which all had largely utilization to nitrogen compounds.关键词
小麦秸秆/玉米秸秆/腐解/BIOLOG/气候/土壤置换试验Key words
Wheat straw/ Maize straw/ Decomposition/ BIOLOG/ Climate/ Soil transplantation experiment分类
农业科技引用本文复制引用
王晓玥,蒋瑀霁,隋跃宇,孙波..田间条件下小麦和玉米秸秆腐解过程中微生物群落的变化——BIOLOG分析[J].土壤学报,2012,49(5):1003-1011,9.基金项目
国家重点基础研究发展规划项目(2011CB100506)、国家自然科学基金项目(40871123)和国家科技支撑计划(2011BAD41B01)资助 （2011CB100506）
