Response of soil microbial ecological functions and biological characteristics to organic fertilizer combined with biochar in dry direct-seeded paddy fields.

Autor: Cao X; School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural affairs, Northeast Agricultural University, Harbin 150030, China., Liu J; School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural affairs, Northeast Agricultural University, Harbin 150030, China. Electronic address: liujilong@neau.edu.cn., Zhang L; College of Arts and Science, Northeast Agricultural University, Harbin 150030, China. Electronic address: lingling20_05@163.com., Mao W; Heilongjiang Province Corporation, China National Tobacco Corporation, Harbin 150010, China., Li M; School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural affairs, Northeast Agricultural University, Harbin 150030, China., Wang H; School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural affairs, Northeast Agricultural University, Harbin 150030, China., Sun W; School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural affairs, Northeast Agricultural University, Harbin 150030, China.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Oct 20; Vol. 948, pp. 174844. Date of Electronic Publication: 2024 Jul 17.
DOI: 10.1016/j.scitotenv.2024.174844
Abstrakt: Biochar and organic fertilizer are commonly used to maintain soil health and sustainable agroecosystems, and the alternate wet-dry management of soil moisture in dry direct-seeded paddy fields can complicate the effects of biochar and organic fertilizer on soil microhabitats. Therefore, this study used chicken manure organic fertilizer to replace some of the inorganic fertilizer and applied biochar to explore the ability of biochar and organic fertilizer to regulate the functions of the soil microhabitat in dry direct-seeded paddy fields. The coupling effect of organic fertilizer and biochar increased the diversity and richness of soil bacteria but had no significant effect on soil fungi. Biochar and organic fertilizer affected the distribution and composition of soil bacteria and fungi, and the total number of soil bacteria and fungi increased by 1365 and -71 (5 t/hm 2 biochar and no organic fertilizer), 660 and 79 (10 t/hm 2 biochar and no organic fertilizer), 3121 and 7 (no biochar and 20 % organic fertilizer substitution), 1873 and -72 (5 t/hm 2 biochar and 20 % organic fertilizer substitution), and -544 and -65 (10 t/hm 2 biochar and 20 % organic fertilizer substitution), respectively, compared with that of the control treatment. Compared with the application of biochar alone, the coupling effect of biochar and organic fertilizer increased the average degree (0.95 and 0.16), links (190 and 32), and ratio of fungal positive links (1.651 %), and decreased the modularity (0.034 and 0.052) and ratio of bacterial positive links (6.482 %) of bacterial and fungal networks. In addition, the coupling effect resulted in a more complex association between soil microbial diversity and richness and microbial ecological functions. Random forest predictions indicated that, organic fertilizer as a random factor, changes in the abundance of bacterial Bacteroidetes and Nitrospirae and fungal Monoblepharomycota were the main factors driving the differences in soil microbial ecological functions.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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