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Two-year study of biochar: Achieving excellent capability of potassium supply via alter clay mineral composition and potassium-dissolving bacteria activity

文献类型： 外文期刊

作者： Zhang, Mengyang 1 ; Riaz, Muhammad 1 ; Liu, Bo 1 ; Xia, Hao 1 ; El-desouki, Zeinab 1 ; Jiang, Cuncang 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Resources & Environm, Microelement Res Ctr, Wuhan 430070, Hubei, Peoples R China

2.South China Agr Univ, Coll Nat Resources & Environm, Root Biol Ctr, Guangzhou 510642, Peoples R China

3.Hubei Acad Agr Sci, Inst Plant Protect & Soil Fertilizer, Wuhan 430070, Hubei, Peoples R China

4.Ain Shams Univ, Dept Soil Sci, Fac Agr, Cairo 11241, Egypt

关键词： Biochar; Potassium; Bacterial community; Clay minerals; Potassium-dissolving bacteria

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 717 卷

页码：

收录情况： SCI

摘要： At present, there has been renewed interest in biochar research, but most of them were focused on the short-term effects of biochar and the information of long-term application of biochar is still lacking. In addition, the nutrient mechanism of biochar has rarely been the subject of research. This research explored the effect of potassium (K) nutrient and the response of bacterial communities to biochar in yellow-brown soil based on two-year experiment. In this study, we used peanut shell biochar obtained by pyrolysis at 400 degrees C, and at the same time, 0%, 20%, 40%, 100% conventional potassium fertilizer were used. The results indicated that the effective improvement of biochar on acidic soil was long-term and 2% biochar replaced 40% conventional potassium fertilizer. Biochar accelerated the conversion of slowly-available K to available K by changing the composition of clay minerals and promoting the growth of K-dissolving bacteria. From the perspective of bacterial community, biochar significantly increased the relative abundance of Sphingomonas, Gaiella, and Elev-16S-1332, which improved the potential ability of soil to degrade pollutants and inhibit pathogens. The pH, organic matter, cation exchange capacity (CEC), and available phosphorus and potassium were important environmental factors that caused significant effects in the bacterial community of yellow-brown soil. Overall, the study demonstrates that biochar is not only an effective alternative to potash fertilizer but also improves soil bacterial communities. (c) 2020 Elsevier B.V. All rights reserved.

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