文献类型： 外文期刊

作者： Wang, Xiangjie ¹ ; Sun, Tao ³ ; Mao, Xiali ¹ ; Cheng, Qi ¹ ; Liu, Xiu ¹ ; Zhou, Jingjie ¹ ; He, Yinfeng ⁴ ; Ma, Qingxu ¹ ; Wu, Lianghuan ¹ ;

作者机构： 1.Zhejiang Univ, Minist Educ, Key Lab Environm Remediat & Ecosyst Hlth, Coll Environm & Resource Sci, Hangzhou 310058, Peoples R China

2.Zhejiang Univ, Coll Environm & Resource Sci, Zhejiang Prov Key Lab Agr Resources & Environm, Hangzhou 310058, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizers, Hangzhou 310021, Peoples R China

4.Univ Nottingham Ningbo China, Nottingham Ningbo China Beacons Excellence Res & I, Ningbo 315100, Peoples R China

5.Univ Nottingham, Fac Engn, Nottingham NG7 2RD, England

关键词： Ecological stoichiometry; Fertilization regimes; Extracellular enzyme; Vector analysis

期刊名称：PLANT AND SOIL （ 影响因子：3.9； 五年影响因子：4.6 ）

ISSN： 0032-079X

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Aims Ecological stoichiometry reflects the stability of resources in farmland ecosystems. Long-term fertilization modulates soil nutrient resources in different soil aggregate sizes. However, how fertilization regimes alter nutrient resource limitations in different soil aggregate sizes remains unclear. Methods We measured the activity of extracellular enzymes (EEAs) involved in the acquisition of nutrients such as soil carbon (C), nitrogen (N), and phosphorus (P), in conjunction with soil extracellular enzyme stoichiometry (EES) to reflect microbial resource demands. Four different fertilizing strategies (no fertilization, chemical fertilizer, chemical fertilizer plus cow manure, chemical fertilizer plus rice straw) were evaluated. Results Applying fertilizer changed the size distribution of soil aggregates. The results from the EES model and vector analysis indicated that the application of cow manure could effectively alleviate carbon and nitrogen resource limitations (p < 0.05), as evidenced by changes in soil C: N, C: P, and N: P ratios. Microbial carbon limitation in microaggregates was greater than that in other soil aggregate sizes, whereas microbial nitrogen limitation in macroaggregates was the greatest among all treatments. Using random forest and partial least squares path models, we found that fertilization and soil aggregate size indirectly affected carbon limitation by influencing microbial biomass. Conclusions Fertilization and soil aggregates not only affected nitrogen limitation directly but also indirectly by influencing nutrient resources, especially, the C: N ratio. Above all, in agricultural production, we can alleviate the nutrient limitations in the soil by adjusting the ratio of nutrients in fertilizers, providing an in-depth understanding for designing fertilizer formulations and appropriate fertilizing strategies.