Microbial C/N metabolic capabilities contribute to the fate of crop residue N in plant-soil-microbe continuum over multiple seasons
文献类型： 外文期刊
作者： Xie, Zhihuang 1 ; Li, Yansheng 2 ; Yu, Zhenhua 2 ; Wang, Guanghua 2 ; Liu, Xiaobing 2 ; Tang, Caixian 3 ; Liu, Junjie 2 ; Liu, Judong 2 ; Wu, Junjiang 4 ; Herbert, Stephen J. 5 ; Jin, Jian 2 ;
作者机构： 1.Fujian Agr & Forestry Univ, Engn Res Ctr Soil Remediat Fujian Prov Univ, Coll Resources & Environm, Fuzhou 350002, Peoples R China
2.Chinese Acad Sci, Northeast Inst Geog & Agroecol, State Key Lab Black Soils Conservat & Utilizat, Harbin 150081, Peoples R China
3.La Trobe Univ, La Trobe Inst Sustainable Agr & Food, Dept Ecol Plant & Anim Sci, Bundoora, Vic 3086, Australia
4.Heilongjiang Acad Agr Sci, Soybean Res Inst, Key Lab Soybean Cultivat, Minist Agr, Harbin 150086, Peoples R China
5.Univ Massachusetts, Ctr Agr, Amherst, MA 01003 USA
期刊名称：ISCIENCE （ 影响因子：4.1； 五年影响因子：4.7 ）
ISSN：
年卷期： 2025 年 28 卷 5 期
页码：
收录情况： SCI
摘要： The mineralization of crop residue-nitrogen (N) is important for sustainable N supply to subsequent crops. However, the microbial mechanisms regarding residue-N mineralization over growth seasons are still unclear. We amended 15N-labelled maize and soybean residues to a Mollisol soil and found that, after three growth seasons, soybean plants utilized 43% and 37% of soybean and maize residue-N, respectively. Approximately 10.5% of soybean and 18.6% of maize residue-N were recovered in the labile N pools in soil. Overtime, 82% of soybean residue-N was mineralized compared with 66% for maize residue-N. Greater increases in abundances of microbial functional genes involved in organic C decomposition, N mineralization, N2 fixation, and denitrification were observed in the soybean residue compared to the maize residue treatment. The study implies that soybean residue amendment may lower fertilizer N input more effectively than maize residue, considering the N balance between crop demand and soil supply in farming Mollisols.
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