Interaction of Biochar Type and Rhizobia Inoculation Increases the Growth and Biological Nitrogen Fixation ofRobinia pseudoacaciaSeedlings

文献类型： 外文期刊

第一作者： Sun, Qiaoyu

作者： Sun, Qiaoyu;Liu, Hongbin;Liu, Yong;Dumroese, R. Kasten

作者机构：

关键词： pyrolysis biochar; gasification biochar; black locust; rhizobium; isotopic nitrogen

期刊名称：FORESTS （ 影响因子：2.633； 五年影响因子：2.804 ）

ISSN：

年卷期： 2020 年 11 卷 6 期

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收录情况： SCI

摘要： Adding biochar to soil can change soil properties and subsequently affect plant growth, but this effect can vary because of different feedstocks and methods (e.g., pyrolysis or gasification) used to create the biochar. Growth and biological nitrogen fixation (BNF) of leguminous plants can be improved with rhizobia inoculation that fosters nodule development. Thus, this factorial greenhouse study examined the effects of two types of biochar (i.e., pyrolysis and gasification) added at a rate of 5% (v:v) to a peat-based growth substrate and rhizobia inoculation (yes or no) onRobinia pseudoacacia(black locust) seedlings supplied with(15)NH(4)(15)NO(3). Seedling and nodule growth, nitrogen (N) content, and delta N-15 x 1000 were evaluated after 3 months. While addition of biochar without inoculation had no effect on seedling growth, inoculation with rhizobia increased seedling growth, BNF, and N status. Inoculated seedlings had reduced delta N-15, indicating that N provided via fertilization was being diluted by N additions through BNF. Biochar type and inoculation interacted to affect seedling growth. Combining inoculation with either biochar type increased seedling leaf, stem, and total biomass, whereas gasifier biochar and inoculation improved all seedling growth variables and nodule biomass.

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