Biochar application increases maize yield under film mulching due to higher soil organic content and soil aggregate stability in a semi-arid area

文献类型： 外文期刊

第一作者： Pang, Jinwen

作者： Pang, Jinwen;Wang, Yuhao;Wang, Bingfan;Wang, Jiayi;Ren, Xiaolong;Jia, Zhikuan;Wei, Ting;Zhang, Peng;Pang, Jinwen;Wang, Yuhao;Wang, Bingfan;Wang, Jiayi;Ren, Xiaolong;Jia, Zhikuan;Wei, Ting;Zhang, Peng;Liu, Enke;Gao, Fei;Sun, Shikun

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关键词： Biochar application; Film mulching; Maize yield; Soil aggregate; Soil organic carbon

期刊名称：JOURNAL OF SOILS AND SEDIMENTS （ 影响因子：3.6； 五年影响因子：3.8 ）

ISSN： 1439-0108

年卷期： 2023 年 23 卷 4 期

页码：

收录情况： SCI

摘要： PurposeIt is very important to build up soil fertility to maintain the sustainability of crop production in film mulched fields in northwest China. However, the effects of different biochar application rates on the soil organic carbon (SOC) contents and crop yields in film-mulched farmland remain unclear. The results obtained in this study can guide the selection of appropriate biochar application rates for film-mulched farmland management in semiarid areas.MethodsA field experiment was conducted with four different biochar application rates (no biochar = 0 t ha-1, low = 3 t ha-1, medium = 6 t ha-1, and high = 9 t ha-1) to farmland under continuous film mulching and no-mulching in a semiarid area. The SOC contents, soil aggregate fractions, and maize yields were measured, and the soil aggregate stability was calculated.ResultsMulching significantly increased the soil macro-aggregate content (15.9-83.6%) and maize yield (35.0-41.8%). Under mulching, biochar application significantly increased the mean weight diameter (MWD) and geometric mean diameter (GMD) by 10.2% and 4.5%, respectively, and the effects increased as the biochar application rate increased. In addition, applying biochar increased the SOC and aggregate organic carbon (AOC) contents, where the effects were greater under the high biochar amount than the other treatments. Biochar application also increased the contribution of SOC in macro-aggregates (> 0.25 mm) to the total SOC, thereby promoting carbon sequestration in soils. Furthermore, the yield was correlated with the biochar addition rate, and the highest yield of 12.8 t ha-1 was obtained under the highest biochar application rate.ConclusionsIn conclusion, biochar application significantly improved the soil aggregate characteristics and organic carbon contents of farmland under film mulching. Biochar application also helped to increase the maize yield and promote the sequestration of soil carbon.

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