Variations in soil aggregate distribution and associated organic carbon and nitrogen fractions in long-term continuous vegetable rotation soil by nitrogen fertilization and plastic film mulching

文献类型： 外文期刊

第一作者： Wang, Fangli

作者： Wang, Fangli;Liu, Yu;Liang, Bin;Liu, Jun;Zong, Haiying;Song, Ningning;Guo, Xiaohong;Wang, Xuexia

作者机构：

关键词： Plastic film mulching; Nitrogen fertilization; Soil aggregate stability; Soil aggregate-associated organic carbon; Soil aggregate-associated nitrogen; Contribution quantification

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：10.753； 五年影响因子：10.237 ）

ISSN： 0048-9697

年卷期： 2022 年 835 卷

页码：

收录情况： SCI

摘要： Small changes in soil aggregates-associated organic carbon (OC) can induce huge fluctuations in greenhouse gas emissions. However, there is a knowledge gap on the responses to nitrogen (N) fertilization under plastic film mulching, especially in long-term continuous rotation systems. This study assessed the impacts of plastic film mulching and N fertilization on the soil aggregate distribution and associated OC and N fractions in a 10-year continuous cucumber cabbage rotation soil (0-40 cm). The impacts also were further quantified using the design of experiment (DOE) method. Plastic film mulching alleviated the impact of N fertilization on soil aggregate stability, which declined under higher N doses. Plastic film mulching coupled with N fertilization resulted in higher contents of soil OC and dissolved OC in macroaggregates but lower contents in silt+clay-aggregates. The total N and dissolved organic N (DON) contents in different aggregates varied significantly with N application doses, and the alternations were impacted by plastic film mulching, which improved the DON distribution in larger agglomerates, especially at medium and high N doses. Soil aggregate distribution and associated OC and N fractions did not show consistent trends in different soil depths, which was attributed to the contributions of plastic film mulching, N fertilization and their interactions. The study suggests that N fertilizer should be applied under plastic film mulches at appropriate levels to improve C assimilation and soil fertility and promote the sustainable development of long-term vegetable rotation systems.

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