中国农业科学 ›› 2021, Vol. 54 ›› Issue (18): 3959-3969.doi: 10.3864/j.issn.0578-1752.2021.18.014

• 园艺 • 上一篇    下一篇

茶-山苍子间作对茶园土壤微生物群落结构的影响

郝海平1,2(),白红彤1,夏菲1,郝渊鹏1,李慧1,崔洪霞1,谢晓明3,石雷1()   

  1. 1中国科学院植物研究所/北方资源植物重点实验室,北京 100093
    2廊坊师范学院生命科学学院,河北廊坊 065000
    3江西虔心小镇生态农业有限责任公司,中国科学院植物研究所虔心小镇试验基地,江西龙南 341708
  • 收稿日期:2020-11-23 接受日期:2021-01-07 出版日期:2021-09-16 发布日期:2021-09-26
  • 联系方式: 郝海平,E-mail: haohaiping2014@126.com。
  • 基金资助:
    中国科学院A类战略性先导科技专项(XDA23080603);企业委托项目(70009C6057);博士科研启动项目(XBQ202030)

Effects of Tea-Litsea Cubeba Intrercropping on Soil Microbial Community Structure in Tea Plantation

HAO HaiPing1,2(),BAI HongTong1,XIA Fei1,HAO YuanPeng1,LI Hui1,CUI HongXia1,XIE XiaoMing3,SHI Lei1()   

  1. 1Key Laboratory of Plant Resources/Institute of Botany, Chinese Academy of Sciences, Beijing 100093
    2Department of Life Sciences, Langfang Normal University, Langfang 065000, Hebei
    3Qianxin Town Experimental Base, Institute of Botany, Chinese Academy of Sciences, Jiangxi I Chan Eco-Agriculture Co., Ltd, Longnan 341708, Jiangxi
  • Received:2020-11-23 Accepted:2021-01-07 Published:2021-09-16 Online:2021-09-26

摘要:

【目的】解析山苍子间作条件下茶园土壤微生物群落结构的变化规律及其影响因素,为茶-山苍子间作的土壤生态效应评估提供数据支撑。【方法】综合运用GC-MS、ICP-MS,以及16S、ITS高通量测序技术分别对土壤浸提液成分、土壤矿质营养元素含量、土壤细菌和真菌种群结构进行测定分析。【结果】间作处理显著改变了土壤微生物种群结构,土壤中参与氮(N)、磷(P)和锰(Mn)等过程的功能性细菌丰度显著增加,植物致病细菌和真菌丰度显著降低,根系分布层具有溶解磷(P)功能的伯克氏菌属伯克氏菌丰度是对照的86倍,镰刀菌属镰刀霉丰度比对照降低了73.13%。间作影响了P、铁(Fe)、Mn等土壤矿质营养元素的含量,尤其是P,根系分布层土壤P含量比对照增加76.42%。间作区域土壤分别含有12.80%的樟脑、6.72%的Alpha-松油醇和12.65%的香茅醇等杀菌或抑菌物质。冗余分析表明,间作区域土壤中的樟脑、桉叶油醇、Alpha-松油醇、乙酸冰片酯和香茅醇等次生代谢物与P元素是影响土壤微生物群落结构的主要环境因子。【结论】茶-山苍子间作显著改变了土壤微生物群落结构和丰度,樟脑、Alpha-松油醇和香茅醇等次生代谢产物和P元素是导致土壤微生物群落变化的主要环境因子,茶园及其他农田系统间作植物的选择应重视次生代谢产物的输入,尤其是其中的杀菌或抑菌性成分。

关键词: 山苍子, 茶, 间作, 土壤微生物, 土壤性质

Abstract:

【Objective】 The aim of this study was to analyze the changes of soil microbial community structure and its driving factors, so as to provide data support for soil ecological effect evaluation of Tea-Litsea cubeba intercropping. 【Method】GS-MS, ICP-MS, 16S and ITS sequence analysis were used to determine the soil extract composition, soil mineral element content, soil bacteria and soil fungi community structure.【Result】 The soil microbial community structure was significantly affected by the model of Tea-Litsea cubeba intercropping. The abundance of soil functional bacteria related to N, P and Mn transformation increased significantly, while the abundance of plant pathogenic bacteria and fungi was significantly decreased. In the root distribution layer, the abundance of Burkholderia paraburkholderia was 86 times compared to control, and the abundance of Fusarium graminearum was 73.13% lower than that of the control. Tea-Litsea cubeba intercropping increased the P content of tea plantation soil. In the root distribution layer, P content increased by 76.42%. The soil of Tea-Litsea cubeba intercropping contained some antibacterial substance, including 12.80% camphor, 6.72% Alpha-terpineol, and 12.65% citronellol. Redundancy analysis (RDA) showed that the soil extraction and P in the intercropping area were the main environmental factors affecting the community structure of soil microbes.【Conclusion】 Tea-Litsea cubeba intercropping changed the abundance and community structure of soil microbes, and the camphor, Alpha-terpineol, citronellol and P were the main ecological factors that affected the soil microbial community. The selection of intercropping plants in tea plantations and other farmland systems should pay attention to the secondary metabolites that enter the soil, especially those with killing or antibacterial functional components.

Key words: Litsea cubeba, tea, intercropping, soil microbes, soil properties