Drivers of biochar-mediated improvement of soil water retention capacity based on soil texture: A meta-analysis
文献类型： 外文期刊
作者： Wei, Beilei 1 ; Peng, Yunchang 1 ; Lin, Longxin 1 ; Zhang, Dongliang 1 ; Ma, Li 1 ; Jiang, Ligeng 1 ; Li, Yuze 4 ; He, Tieguang 5 ; Wang, Ziting 1 ;
作者机构： 1.Guangxi Univ, State Key Lab Conservat & Utilizat Subtrop Agrobio, Nanning 530004, Guangxi, Peoples R China
2.Guangxi Key Lab Sugarcane Biol, Nanning 530004, Guangxi, Peoples R China
3.Guangxi Univ, Coll Agron, Nanning 530004, Guangxi, Peoples R China
4.Northwest A&F Univ, Coll Agron, Yangling 712100, Shaanxi, Peoples R China
5.Guangxi Acad Agr Sci, Agr Resources & Environm Res Inst, Guangxi Key Lab Arable Land Conservat, Nanning 530007, Guangxi, Peoples R China
关键词： Soil hydrology; Available water capacity; Soil pores; Biochar; Physicochemical properties
期刊名称：GEODERMA （ 影响因子：6.1； 五年影响因子：7.0 ）
ISSN： 0016-7061
年卷期： 2023 年 437 卷
页码：
收录情况： SCI
摘要： Biochar has been widely applied as a soil modifier to improve the physical properties and increase the water content of the soil. Although the response of soil hydrological properties to biochar has been extensively studied, the effect of biochar on soil hydrological properties in different soil textures has not been comprehensively quantified. Here, we performed a meta-analysis of 939 observations to quantify the effects of biochar on the water retention capacity of soil with different textures. The effect of biochar on field capacity (FC) and available water capacity (AWC) of the soil was greater in coarse-textured soils (23.8%, 25.6%) than those in medium(5.0%, 20.9%) and fine-textured soils (7.2%, 11.5%). The permanent wilting point increased in coarse-textured soils (19.9%), decreased in medium-textured soils (-4.2%), and did not change considerably in fine-textured soils as affected by biochar. We demonstrated that FC is not always the main driver of increased AWC. In coarse-textured soils, there is a high correlation between hydrological properties. In addition, the specific surface area, surface functional groups, and cation exchange capacity of biochar are important factors affecting the water retention of soils with different textures. Our study establishes that the differences in soil texture cause heterogeneity in the mechanisms by which biochar improves soil water retention.
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