Urease and beta-glucosidase activity enhanced the transformation of functional groups of humin amended by straw and straw-derived biochar

文献类型： 外文期刊

第一作者： Liu, Xinwei

作者： Liu, Xinwei;An, Qi;Song, Xiangyun;Wang, Yan;Cui, Dejie;Liu, Xinwei;Song, Xiangyun;Hussain, Qaiser;Cui, Liqiang;Wang, Chengji

作者机构：

关键词： Biochar; Humin; Straw; beta-Glucosidase activity; Urease activity; C-13 NMR spectroscopy

期刊名称：CHEMICAL AND BIOLOGICAL TECHNOLOGIES IN AGRICULTURE （ 影响因子：4.839； 五年影响因子：5.83 ）

ISSN：

年卷期： 2022 年 9 卷 1 期

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收录情况： SCI

摘要： Background: Organic materials carbon is mainly sequestrated in humin. However, the carbon (C) stability of humin with organic materials amendments in different types of soils is mainly affected by organic materials or soil types as well as the enzymatic reaction is important for understanding the C sequestration mechanism of soil. Results: In this study, straw and straw-derived biochar were incorporated into three different types of soils. Using C-13 nuclear magnetic resonance (NMR) spectroscopy, the structural composition of humin (Hu) was analyzed, along with the urease and beta-glucosidase activities. The results showed that biochar amendment enhanced aryl C to 49.63%-76.55% while straw amendments increased O-alkyl C of Hu to 33.99%-51.70%. Two-way ANOVA analysis revealed significant differences in the impact of soil types and treatments on enzyme activities and functional groups of humin. A significant positive correlation was found between beta-glucosidase activity and O-alkyl C, phenolic C, and methoxyl C of humin. In addition, urease activity showed a significant positive correlation with alkyl C of humin. Compared to tobacco straw, tobacco straw-biochar amendment increased beta-glucosidase activity for 22.01 mg kg(-1) d(-1), 26.01 mg kg(-1) d(-1) and 14.01 mg kg(-1) d(-1) in three types of soils, respectively. Conclusions: These results showed that beta-glucosidase contributed to the transformation of humin functional groups and was influenced by organic materials and soil types, especially the organic materials types. The findings imply that straw or straw-derived biochar application stimulates urease and beta-glucosidase activities, which improves the alternation of functional groups of humin in different types of soil.

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