文献类型：期刊文献

英文题名：Improve tea quality by enhancing the stability of bacterial community interaction and nitrogen-fixing function in pecan-tea interplanted plantation

作者：Wu, Shuang[1,2] Chang, Jun[1,4] Yao, Xiaohua[1] Wang, Kailiang[1] Hu, Qingsu[3] Yang, Shuiping[2]

第一作者：Wu, Shuang

通信作者：Chang, J[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311499, Peoples R China;[2]Southwest Univ, Coll Resources & Environm, Chongqing 400716, Peoples R China;[3]Songyang Cty Nat Resources & Planning Bur, Songyang 323499, Peoples R China;[4]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou, Zhejiang, Peoples R China

年份：2023

卷号：27

外文期刊名：RHIZOSPHERE

收录：;Scopus(收录号：2-s2.0-85166567322);WOS:【SCI-EXPANDED(收录号:WOS:001051616200001)】；

基金：This study was supported by "Special funds for basic research business expenses from the Central Public Welfare Scientific Research Institute" initiated and led by the Chinese Academy of Forestry [grant & nbsp;number CAFYBB2020SY014], "Key R & amp;D Plan" supported by Zhejiang Province [grant number 2021C02038], and "National key R & amp;D plan" [grant number 2019YFD100160302].

语种：英文

外文关键词：Intercropping; Rhizosphere; Soil microbial community; Co-occurrence network

摘要：Using the 16 S rDNA high-throughput sequencing, the effects of interplanted pecan (Carya illinoinensis) in a typical tea (Camellia sinensis) plantation on soil bacterial species composition and marker species were comparatively analyzed to determine whether nested pecan increases soil microbial diversity in the tea tree rhizosphere. We explored the effects of the underlying mechanisms of this complex ecosystem on tea quality by determining soil physicochemical properties using two types of planting modes: intercropping with pecan versus tea tree monoculture. Our results showed that Rhizobium (Allorhizobium, Neorhizobium, Pararhizobium, and Rhizobium), and Enterobacter, had pollution-degrading effects and were enriched in the soil bacterial communities of the pecan interplanted model. There was a significant enrichment of prebiotic functional bacteria, such as Pedosphaeraceae and Coriobateriaceae_UCG-002, which stimulate plant growth and improve disease resistance, while the functions of Chloroflexi and Firmicutes, which are dominant denitrifying bacteria in the soil, were inhibited. The average degree of soil microbial co-occurrence network increased from 13.40 to 18.17, and the number of nodes in the network increased from 117 to 166, indicating that the network increased in complexity and decreased in mutual exclusivity, and the complex interactions among bacterial populations tended to be stable. The intercropping mode reduced the phenol/ammonia ratio in tea from 2.37 to 1.38, improving the tea quality. Therefore, the soil microbial community composition under this complex model promotes material cycling in microecosystems and effectively reduces the transmission risk of soil-borne diseases. The soil microbial community structure of the tea rhizosphere could be re-balanced and shifted toward a more favorable tea quality formation by the introduction of pecan into tea plantations.