Linkage between soil organic carbon and the utilization of soil microbial carbon under plastic film mulching in a semi-arid agroecosystem in China

文献类型： 外文期刊

第一作者： Liu, Xiu

作者： Liu, Xiu;Dong, Wenyi;Chen, Baoqing;Yan, Changrong;Zhang, Yanqing;Liu, Enke;Liu, Xiu;Dong, Wenyi;Chen, Baoqing;Yan, Changrong;Zhang, Yanqing;Liu, Enke;Si, Pengfei;Zhang, Zhe

作者机构：

关键词： Mulching treatments; soil organic carbon fractions; maize succession cropping system; microbial functional diversity

期刊名称：ARCHIVES OF AGRONOMY AND SOIL SCIENCE （ 影响因子：3.092； 五年影响因子：2.745 ）

ISSN： 0365-0340

年卷期： 2019 年 65 卷 13 期

页码：

收录情况： SCI

摘要： Studying changes in soil organic carbon (SOC) pools and soil microbial C substrate utilization under plastic mulching in different seasons is of great significance for improving soil fertility and sustainable agricultural development. Based on a 2-year plastic film mulching experiment in northeastern China, we investigated the SOC, labile SOC fractions under three treatments: non-mulching (NM), autumn mulching (AM) and spring mulching (SM). The results showed that SOC decreased with soil depth under the AM and SM treatments compared with the NM treatment. The microbial biomass carbon (MBC) and dissolved organic carbon (DOC) under the AM treatment increased significantly in the 0-10 cm soil layer, by 31.2% and 27.2% (p < 0.05), respectively. The AM treatment significantly increased the utilization of amino acids and carbohydrate C sources. Redundancy analysis (RDA) indicated that MBC was the main factor influencing microbial metabolic functional diversity and accounted for the largest variation in the 0-10 cm layer. Pearson's correlation analysis illustrated that MBC was strongly correlated with the utilization of the microbial C substrate. We suggest that AM may be an effective and sustainable management practice for improving soil quality and maintaining microbial functional diversity in semi-arid agroecosystems in this area.

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