The Development and Utilization of Saline-Alkali Land in Western Jilin Province Promoted the Sequestration of Organic Carbon Fractions in Soil Aggregates

文献类型： 外文期刊

第一作者： Qu, Yunke

作者： Qu, Yunke;Qu, Yunke;Qu, Yunke;Tang, Jie;Zhou, Zihao;Liu, Ben;Duan, Yucong;Wang, Sining;Li, Zhaoyang;Wang, Jingjing;Li, Yuefen

作者机构：

关键词： saline-alkali paddy soil; aggregates; organic carbon fractions; soil physicochemical properties; reclamation years

期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）

ISSN：

年卷期： 2021 年 11 卷 12 期

页码：

收录情况： SCI

摘要： Soil samples from T (0~20 cm) and S (20~40 cm) layers of four saline-alkali rice fields (R5, R15, R20, and R35) with different reclamation years were selected to study the distribution of soil aggregates and the contents of readily oxidizable organic carbon (ROC), dissolved organic carbon (DOC), microbial biomass carbon (MBC), potentially mineralizable carbon (PMC), and soil organic carbon (SOC). The effects of large macroaggregate (>2 mm, LMA), small macroaggregate (0.25 to 2 mm, SMA), and microaggregate (<0.25 mm, MA) particle size, soil layer, and soil physicochemical properties on SOC fractions were also analyzed. The results showed that the LMA size in saline-alkali paddy fields were easily decomposed and was unstable due to the influence of the external environment. With the increase in reclamation years, the proportion of LMA in the S layer decreased gradually. The ROC, DOC, MBC and TOC contents of aggregates in the T and S layers gradually increased with the increase in reclamation years, and SOC fractions contents of aggregates in different grain sizes were SMA > LMA > MA. An effective way to increase carbon sink and improve the ecological environment in western Jilin Province is to change the soil environment by planting rice in saline-alkali land.

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