数字农科院2.0

Biochar and nitrogen fertilizer promote rice yield by altering soil enzyme activity and microbial community structure

文献类型： 外文期刊

作者： Sun, Jiali;Li, Hongbo;Wang, Yanan;Du, Zhangliu;Rengel, Zed;Zhang, Aiping

作者机构：

关键词： biochar;enzyme activity;long-term experiment;microbial community;nitrogen fertilizer;phospholipid fatty acids;rice yield

期刊名称： GLOBAL CHANGE BIOLOGY BIOENERGY

ISSN： 1757-1693

年卷期： 2022 年

页码：

收录情况： SCIE（2022版） ; ; EI（2022版）

摘要： Biochar can significantly change soil properties and improve soil quality. However, the effects of long-term combined application of biochar (B) and nitrogen (N) fertilizer on relationships between soil enzyme activity, microbial community structure, and crop yield are still obscure. We characterized these relationships in a long-term (8 years) field experiment with rice, two biochar rates of 0 and 13.5 t ha(-1) year(-1) (B0 and B) and two N fertilizer rates of 0 and 300 kg N ha(-1) year(-1) (N0 and N). The repeated, long-term combined applications of biochar and N fertilizer significantly increased microbial biomass carbon (MBC) and microbial biomass nitrogen (MBN), but biochar decreased the abundance of total bacteria, fungi, actinomycetes, and gram-positive and gram-negative bacteria as well as the amount of total phospholipid fatty acids. The activity of leucine aminopeptidase (LAP) decreased significantly in the biochar-amended and N fertilized treatment, but the LAP activity either remained unchanged or increased with biochar amendment at N0. The relative abundance of bacterial phylum Chloroflexi was increased in the combined biochar and N fertilizer treatment. The changes in soil organic matter and the activity of alpha-1,4-xylosidase were the major properties influencing soil bacterial community composition, whereas the structure of fungal community was governed by MBC, MBN, and LAP activities. In addition, long-term biochar and N fertilizer applied together significantly increased rice yield (more than biochar and nitrogen fertilizer applied alone). Yield was significantly positively correlated with LAP activity, but significantly negatively correlated with the relative abundance of Chloroflexi. In conclusion, long-term biochar and nitrogen fertilizer applications increased rice yield, which was associated with altered soil microbial community and enhanced activity of some enzymes.

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