文献类型：期刊文献

英文题名：Maize residue types and soil fertility levels influence sequestration of newly associated carbon in aggregates with in situ experiments

作者：Wang, Yang[] Liang, Aizhen[2,3] Xu, Yingde[] Zhang, Weijun[1] Li, Ming[4] Wang, Jingkuan[1]

第一作者：Liang, Aizhen;Wang, Yang

通信作者：Wang, JK[1];Liang, AZ[2]

机构：[1]Shenyang Agr Univ, Coll Land & Environm, 120 Dongling Rd, Shenyang 110161, Peoples R China;[2]Chinese Acad Sci, Northeast Inst Geog & Agroecol, State Key Lab Black Soils Conservat & Utilizat, Changchun 130102, Peoples R China;[3]Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Mollisols Agroecol, Changchun 130102, Peoples R China;[4]Chinese Acad Forestry, Res Inst Trop Forestry, 682 Guangshan First Rd, Guangzhou 510000, Peoples R China

年份：2023

卷号：233

外文期刊名：SOIL & TILLAGE RESEARCH

收录：;EI(收录号：20232414209978);Scopus(收录号：2-s2.0-85161334059);WOS:【SCI-EXPANDED(收录号:WOS:001019334200001)】；

基金：This research is supported by the National Natural Science Foundation of China (42207289, 42207383, 42277321, 41671293) , the General Program of Postdoctoral Fund (2021M703200) , Science and Technology Project for Black Soil Granary (XDA28080200) , the Innovation Leadership and Team Program in Sciences and Technologies for Young and Middle-aged Scientists of Jilin Province (20200301022RQ) , the National Key R & amp;D Program of China (2017YFD0200604 and 2016YFD0200304) .

语种：英文

外文关键词：13C-labeling maize residue; Soil organic carbon; Soil aggregate; Maize residue types; Soil fertility levels

摘要：Soil physical structure plays a key role in the sequestration of organic carbon (C) and affects soil fertility and global climate change. However, the dynamics of the residue-derived C in different aggregate fractions are poorly understood. The objectives of this study were to explore the changes in soil aggregate composition and organic C distribution at different fertility levels after the addition of maize residues (roots, stems, and leaves, labeled with 13C). In this study, soil samples with high fertility (HF) and low fertility (LF) levels were formed through a long-term fertilization experiment (29 years), and different types of maize residues were added to the two types of soils. The 13C abundance was quantified in four fractions of soil aggregates large macroaggregates (>2 mm), small macroaggregates (0.25-2 mm), microaggregates (0.053-0.25 mm), and silt and clay (<0.053 mm) on the 60th, 90th, 180th and 540th day following the addition of residues. The findings indicate that the mass proportions of small macroaggregates and microaggregates in the LF soil were lower, whereas those of the other fractions were higher compared with HF soil. Moreover, greater amount of residue-derived C was found to be associated with soil aggregates in LF soil than that in HF soil, and the residue-derived C in different soil aggregate fractions differed with the residue type. The percentages of residue-derived C distributed in the large macroaggregate fractions averaged 19.9% and 15.3% in the LF and HF soils, respectively. Stem and leaf treatments of HF soil improved the stability of soil aggregates. The addition of roots significantly increased the soil organic C content in the aggregates; the residue-derived C content was the highest in the silt and clay fractions and the lowest in the large macroaggregate fraction (>2 mm). These results suggest that the potential benefits of adding maize residue to regulate SOC sequestration and stabilization of soil aggregates, especially in infertile soils.