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Short-term reduction in cropping intensity improves soil quality of topsoil rather than subsoil

文献类型： 外文期刊

作者： Yao, Wei 1 ; Liu, Qi 1 ; Zhou, Jie 1 ; Wen, Yongkang 1 ; Tian, Butao 1 ; Qi, Zhiqiang 3 ; Yang, Yadong 1 ; Zeng, Zhaohai 1 ; Peixoto, Leanne 4 ; Zang, Huadong 1 ;

作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Beijing, Peoples R China

2.Sanya Inst China Agr Univ, Sanya, Peoples R China

3.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou, Peoples R China

4.Aarhus Univ, Dept Agroecol, Tjele, Denmark

5.China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China

关键词： cropping intensity; fallow; rice-vegetables rotation; soil ecosystem multifunctionality; soil quality

期刊名称：LAND DEGRADATION & DEVELOPMENT （ 影响因子：4.7； 五年影响因子：5.0 ）

ISSN： 1085-3278

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Enhancing cropping intensity is the most effective and significant method to improve regional crop production and ensure food security. However, our understanding of the impacts of reduced cropping intensity on soil quality and ecosystem multifunctionality (EMF) with soil depth remains incomplete in tropical regions. Here, we performed a 4-year field experiment to estimate the impacts of cropping intensity (continuous cropping, winter fallow, and annual fallow) on soil quality and EMF depending on soil depths. We found that reduced cropping intensity improved soil quality at the topsoil (0-10 cm), while it had no significant influences on soil carbon (C) and nitrogen (N) storage, as well as soil EMF at 0-40 cm. Soil microbes were limited by C and P but not co-limited by N in all three cropping systems. Reduced cropping intensity exacerbated microbial C limitation at 0-10 cm due to reduced additional C resources (i.e., rice straw and manure) input. Redundancy analysis and Pearson correlation showed that soil N significantly affected the C-, N-, and P-acquisition enzyme activities, and correlated positively with soil organic C, microbial biomass C, and available P. In conclusion, short-term reduction in cropping intensity improves topsoil quality but not soil EMF under paddy-upland rotations in the tropical region.

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