Related Experiment Video
Updated: Jun 8, 2026

Assessment of Labile Organic Carbon in Soil Using Sequential Fumigation Incubation Procedures
Published on: October 29, 2016
[Effects of long-term fertilization on paddy soils organic nitrogen, microbial biomass, and microbial functional
Xiao-Hui Hao1, Rong-Gui Hu, Jin-Shui Wu
1College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China. hetty_hitt@163.com
Abstract:
Soil samples were collected from the plow layers at two long-term experiment sites in Xinhua and Ningxiang counties of Hunan Province, China to study the effects of long-term fertilization on organic nitrogen, microbial biomass, and microbial functional diversity of paddy soils. Long-term fertilization showed great effects on the soil N content. Compared with CK, treatments NPK plus manure or straw increased the contents of soil total acid-hydrolysable N and its fractions amino sugar N, amino acid N, and ammonium N. Treatment NPK had no significant effects on soil microbial biomass C and N, but treatments NPK plus manure increased the contents of soil microbial biomass C and N significantly. BIOLOG test showed that treatments NPK plus manure enhanced the carbon utilization efficiency of soil microbes, and improved the functional diversity of soil microbial communities, compared with CK. Long-term different fertilizer treatments resulted in the differences of carbon substrate utilization patterns of soil microbial communities.
Related Concept Videos
Soil Microbial Ecology
Microorganisms in Agriculture and Food industry
The Roles of Bacteria and Fungi in Plant Nutrition
Inorganic Nitrogen Assimilation
Overview of Nitrogen Metabolism
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this nitrogen...
Microbes and the Nitrogen Cycle

