Zou Yan, Shen Fangyuan, Zhong Yanni, Lv Changning, Pokharel Sabin Saurav, Fang Wanping, Chen Fajun
Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
Department of Tea Science, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China.
Plants (Basel). 2022 Jul 20;11(14):1883. doi: 10.3390/plants11141883.
Ecological shading fueled by maize intercropping in tea plantations can improve tea quality and flavor, and efficiently control the population occurrence of main insect pests. In this study, tea plants were intercropped with maize in two planting directions from east to west (i.e., south shading (SS)) and from north to south (i.e., east shading (ES) and west shading (WS)) to form ecological shading, and the effects on tea quality, and the population occurrence and community diversity of insect pests and soil microbes were studied. When compared with the non-shading control, the tea foliar nutrition contents of free fatty acids have been significantly affected by the ecological shading. SS, ES, and WS all significantly increased the foliar content of theanine and caffeine and the catechin quality index in the leaves of tea plants, simultaneously significantly reducing the foliar content of total polyphenols and the phenol/ammonia ratio. Moreover, ES and WS both significantly reduced the population occurrences of and . Ecological shading significantly affected the composition of soil microbial communities in tea plantations, in which WS significantly reduced the diversity of soil microorganisms.
茶园间作玉米形成的生态遮荫可改善茶叶品质和风味，并有效控制主要害虫的种群发生。本研究中，茶树与玉米按从东到西（即南侧遮荫（SS））和从北到南（即东侧遮荫（ES）和西侧遮荫（WS））两个种植方向间作以形成生态遮荫，并研究其对茶叶品质、害虫种群发生及群落多样性和土壤微生物的影响。与无遮荫对照相比，生态遮荫显著影响了茶叶游离脂肪酸的叶面营养含量。SS、ES和WS均显著提高了茶树叶片中茶氨酸、咖啡因的叶面含量以及儿茶素品质指数，同时显著降低了总多酚的叶面含量和酚/氨比。此外，ES和WS均显著降低了 和 的种群发生量。生态遮荫显著影响了茶园土壤微生物群落的组成，其中WS显著降低了土壤微生物的多样性。
