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Biochar Enhances the Resistance of Legumes and Soil Microbes to Extreme Short-Term Drought

文献类型： 外文期刊

作者： He, Kang 1 ; Liu, Qiangbo 2 ; Zhang, Jialei 3 ; Zhang, Guanchu 1 ; Li, Guolin 4 ;

作者机构： 1.Shandong Peanut Res Inst, Qingdao 266100, Peoples R China

2.Shandong Agr Univ, Coll Life Sci, Natl Key Lab Wheat Improvement, Tai An 271018, Peoples R China

3.Shandong Acad Agr Sci, Jinan 250100, Peoples R China

4.Sun Yat Sen Univ, Sch Ecol, State Key Lab Biocontrol, Shenzhen 518107, Peoples R China

关键词： biochar; resistance; soil; microbe; drought

期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）

ISSN： 2223-7747

年卷期： 2023 年 12 卷 24 期

页码：

收录情况： SCI

摘要： Short-term drought events occur more frequently and more intensively under global climate change. Biochar amendment has been documented to ameliorate the negative effects of water deficits on plant performance. Moreover, biochar can alter the soil microbial community, soil properties and soil metabolome, resulting in changes in soil functioning. We aim to reveal the extent of biochar addition on soil nutrients and the soil microbial community structure and how this improves the tolerance of legume crops (peanuts) to short-term extreme drought. We measured plant performances under different contents of biochar, set as a gradient of 2%, 3% and 4%, after an extreme experimental drought. In addition, we investigated how soil bacteria and fungi respond to biochar additions and how the soil metabolome changes in response to biochar amendments, with combined growth experiments, high-throughput sequencing and soil omics. The results indicated that biochar increased nitrites and available phosphorus. Biochar was found to influence the soil bacterial community structure more intensively than the soil fungal community. Additionally, the fungal community showed a higher randomness under biochar addition when experiencing short-term extreme drought compared to the bacterial community. Soil bacteria may be more strongly related to soil nutrient cycling in peanut agricultural systems. Although the soil metabolome has been documented to be influenced by biochar addition independent of soil moisture, we found more differential metabolites with a higher biochar content. We suggest that biochar enhances the resistance of plants and soil microbes to short-term extreme drought by indirectly modifying soil functioning probably due to direct changes in soil moisture and soil pH.

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