Impact of Microbial Inoculants on Microbial Quantity, Enzyme Activity and Available Nutrient Content in Paddy Soil

• Published in: The journal of Northeast Agricultural University Vol. 22; no. 4; pp. 7 - 14
• Main Author: Liu Xiao-jie Duan Xue-jiao Ma Na Sun Tao Xu Jing-gang
• Format: Journal Article
• Language: English
• Published: Elsevier (Singapore) Pte Ltd 01.12.2015; National Soybean Engineering Technology Research Center, Northeast Agricultural University, Harbin 150030, China%College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
• Subjects: microbial fertilizer; paddy soil; soil enzyme activity; soil microorganism; paddy soil; soil microorganism; microbial fertilizer; soil enzyme activity
• ISSN: 1006-8104
• DOI: 10.1016/S1006-8104(16)30013-7

The experiment was conducted to study the impact of application of microbial inoculants, compared with no microbial fertilizer, on enzyme activity, microbial biomass and available nutrient contents in paddy soil in Heilongjiang Province. The application of soil phosphorus activator was able to increase the quantity of bacteria and fungi in soil, but its effect on actinomycetes in soil was not significant. The application of microbial inoculants increased the urease and sucrase activities in soil over the growing season, but only at the maturing stage soil acid phosphatase activity was enhanced with the applying soil phosphorus activator. The application of soil phosphorus activator increased alkali-hydrolyzable nitrogen and available phosphorus contents in soil, but did not increase available potassium content in soil. The optimal microbial inoculant application rate as applied as soil phosphorus activator was 7.5 kg hm-2.