Metagenomic strategies uncover the soil bioavailable phosphorus improved by organic fertilization in Mollisols
文献类型: 外文期刊
作者: Hu, Xiaojing 1 ; Gu, Haidong 1 ; Liu, Junjie 1 ; Wei, Dan 2 ; Zhu, Ping 3 ; Cui, Xian 1 ; Zhou, Baoku 2 ; Chen, Xueli 2 ; Jin, Jian 1 ; Liu, Xiaobing 1 ; Wang, Guanghua 1 ;
作者机构: 1.Chinese Acad Sci, Northeast Inst Geog & Agroecol, State Key Lab Black Soils Conservat & Utilizat, Harbin 150081, Peoples R China
2.Heilongjiang Acad Agr Sci, Inst Soil & Fertilizer & Environm Resources, Harbin 150086, Peoples R China
3.Jilin Acad Agr Sci, Inst Agr Resource & Environm, Changchun 130033, Peoples R China; Heilongjiang Acad Agr Sci, Heihe Branch, Heihe 164300, Peoples R China
4.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr & Resources, Beijing 100097, Peoples R China
关键词: Chemical and organic fertilization; Soil phosphorus cycling; Microbial functional genes; Metagenome-assembled genomes; Mollisols
期刊名称:AGRICULTURE ECOSYSTEMS & ENVIRONMENT ( 影响因子:6.6; 五年影响因子:6.7 )
ISSN: 0167-8809
年卷期: 2023 年 349 卷
页码:
收录情况: SCI
摘要: Microorganisms play essential roles in soil phosphorus (P) cycling and the regulation of P bioavailability, however, genetic information on microbial P cycling in response to nutrient inputs is largely unclear. Here, metagenomic sequencing and genome binning were used to investigate microbial functional traits under chemical and organic fertilization in three long-term field experiments across black soil region of Northeast China. The results revealed that manure amendments strongly affected microbial P cycle-related functional gene patterns, which were significantly and positively correlated with the contents of soil total P (TP) and available P (AP). Manure addition directly increased soil AP concentrations, and indirectly acted through the alterations of microbial functional genes involved in soil P cycling. Specifically, manure amendments consistently decreased abundances of phnC gene and increased gene abundances of phnP, opd, and phoN across three locations, sug-gesting the potentially inhibition of soil microbial P-uptake and transport and the promotion of soil microbial organic P-mineralization. Manure addition promoted microbial inorganic P-solubilization by enriching the ppa, gcd, and pqqC genes at two out of three locations, while chemical fertilizer (CF) addition slightly stimulated the functional gene abundances involved in microbial P-uptake and transport and P-starvation response regulation. In addition, soil AP content was negatively correlated with the phnC gene abundance but positively correlated with the gene abundances of opd and phoN. Moreover, 23 metagenome-assembled genomes (MAGs) were reconstructed covering all soil samples, all of which contained the phnC gene with the copy numbers varying from 1 to 19. Nevertheless, only bin44 had a negative correlation with soil AP (r =-0.361, P = 0.030) and could be considered as a potential indicator regulating microbial P-uptake and transport. Taken together, manure inputs positively accelerated microbial P-transformations, which was beneficial for the establishment of efficient P management strategies in sustainable-intensive agriculture.
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