Effect of no-tillage with straw mulch and conventional tillage on soil organic carbon pools in Northern China

文献类型： 外文期刊

第一作者： Si, Pengfei

作者： Si, Pengfei;Sun, Zhanxiang;Si, Pengfei;Sun, Zhanxiang;Liu, Enke;He, Wenqing;Dong, Wenyi;Yan, Changrong;Zhang, Yanqing;Liu, Enke;He, Wenqing;Dong, Wenyi;Yan, Changrong;Zhang, Yanqing

作者机构：

关键词： Tillage; soil organic carbon; labile soil organic carbon; maize yield

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： 2018 年 64 卷 3 期

页码：

收录情况： SCI

摘要： The dynamics of soil organic carbon (SOC) is imperative for maintaining soil quality. Our objective was to investigate the effects of tillage practices on SOC and its fractions at the depth (0-60 cm) of Chromic Cambisol profile in northern China. The experiment including no-tillage with straw mulch (NTSM) and conventional tillage (CT). Our results indicated that differences in SOC concentration and stock were primarily evident in the 0-10 cm layer. The particulate organic matter carbon (POM-C), dissolved organic carbon (DOC), and microbial biomass carbon (MBC) levels in the top layers (0-10 cm) under the NTSM treatment were 28.5, 26.1 and 51.0% higher than CT. A positive correlation was observed between these labile C fractions and the SOC, and POM-C was the much more sensitive indicator of SOC quality than MBC and DOC. NTSM was unable to sustain the greater yields, and from 2006 to 2011, the mean maize yield for NTSM was significantly lower than that for CT (P < 0.05). NTSM resulted in higher SOC content and stocks in dryland farming systems but lower crop yields is a concern which needs to be addressed in order to make these systems acceptable to the farming community.

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