Effects of Soil Management from Fallow to Grassland on Soil Microbial and Organic Carbon Dynamics
Permanent 60 year fallow, arable and grassland soils from the Highfield Ley-Arable Experiment at Rothamsted Research, UK were used to investigate if extremes in soil management affected soil microbial biomass, microbial activity and microbial diversity. They were incubated under laboratory conditions, with and without amendment with a labile (yeast extract) and recalcitrant substrate (ryegrass). Microbial biomass ATP concentrations were not significantly different between the soils, with or without substrate addition. The biomasses in the three soils also mineralised the two substrates similarly and microbial biosynthesis efficiency (measured as biomass C and ATP) was similar. However, Phospholipid Fatty Acid (PLFA) analysis revealed that microbial community structure, with and without substrates, differed significantly between soils. Therefore substrate type drives soil microbial ecosystem response much more than does soil microbial biodiversity.
Biomass Community structure Mineralization Phospholipid fatty acid
Yuping Wu Sarah Kemmitt Jianming Xu Philip C Brookes
Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition,College of Environmental Soil Science Department,Rothamsted Research,Harpenden,Herts,AL5 2JQ,UK Current address: British Libr Soil Science Department,Rothamsted Research,Harpenden,Herts,AL5 2JQ,UK
国际会议
杭州
英文
20-22
2009-10-10（万方平台首次上网日期，不代表论文的发表时间）