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Maize and soybean rotation benefits soil quality and organic carbon stock

文献类型： 外文期刊

作者： Luo, Bolun 1 ; Zhou, Jie 1 ; Yao, Wei 1 ; Wang, Yuxian 2 ; Guillaume, Thomas 3 ; Yuan, Ming 2 ; Han, Dongwei 2 ; Bilyera, Nataliya 4 ; Wang, Lianxia 2 ; Zhao, Lei 2 ; Yang, Yadong 1 ; Zeng, Zhaohai 1 ; Zang, Huadong 1 ;

作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, State Key Lab Maize Biobreeding, Beijing 100193, Peoples R China

2.Qiqihar Sub Acad Heilongjiang Acad Agr Sci, Qiqihar 161006, Heilongjiang, Peoples R China

3.Agroscope, Res Div Plant Prod Syst, Field Crop Syst & Plant Nutr, Nyon, Switzerland

4.Univ Tubingen, Dept Geosci, Geobiosphere Interact, Tubingen, Germany

关键词： Soybean and maize rotation; C stock; Soil enzyme activities; Soil quality index; Soil ecosystem multifunctionality

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.4； 五年影响因子：8.6 ）

ISSN： 0301-4797

年卷期： 2024 年 372 卷

页码：

收录情况： SCI

摘要： Soybean and maize rotation has been recommended as a promising strategy to maximize crop yield. However, the impacts of soybean-maize rotation, and particularly the frequency of soybean inclusion, on soil quality and carbon (C) stock need to explored. We conducted an 8-year field experiment of randomized design in Northeast China with four cropping systems as continuous soybean (S), continuous maize (M), soybean-maize rotation (SM), and soybean-maize-maize rotation (SMM). The results showed that the soil quality index, soil ecosystem multifunctionality (EMF), and C stock under crop rotation (SM and SMM) were 5.4-23.5%, 13.1-22.6%, and 9.3-29.4% higher than those under continuous cropping (M and S), respectively. Additionally, the increased frequency of soybean in the rotation increased soil EMF by 14.8% due to higher soil enzyme activities and available N. Notably, the soybean-maize rotation alleviated microbial nitrogen (N) limitation compared to continuous cropping, due to stimulated C, N, and P acquisition by enzyme activities. Furthermore, the soil quality index correlated positively with C stock in the topsoil. The accumulation rates of soil organic C and total N were higher by 0.39 and 0.14 g kg(-1) year(-1) in SMM than in SM, respectively. Therefore, scientifically based soybean frequency is an effective approach to enhance soil organic C in soybean and maize rotation. In conclusion, soybean-maize rotation improves soil quality compared to monoculture, and a reduced frequency of soybean within the rotation (SMM) is beneficial for C and N storage.

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