不同间作模式对茶园光合作用及叶片解剖结构的影响
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1.西南林业大学 园林园艺学院;2.云南省古茶树资源保护与利用研究中心

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云南省重大科技专项(202002AA100007);“兴滇英才支持计划”青年人才专项(XDYC-QNRC-2022-0207);西南林业大学科学研究预研项目(110822090)


Effects of Different Intercropping Patterns on Photosynthesis and Leaf Anatomy in Tea Plantations
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Yunnan Provincial Major Science and Technology Special Project (202002AA100007); Young Talent Special Project of

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    摘要:

    【目的】探索不同间作模式下茶树光合生理及叶片结构的变化。【方法】以云南省南涧县无量山樱花谷种植范围内马缨花-茶(MT)、冬樱花-茶(DT)、核桃-茶(HT)及纯茶园(CK)4种间作模式为对象,通过对不同间作模式下茶树叶片解剖以及茶树光合生理生态功能变化规律进行研究。【结果】三种间作模式显著降低了茶园茶树的光合有效辐射通量(PAR)及春季茶树叶片(TL)温度,不同间作模式的净光合速率(Pn)、蒸腾速率(Tr)春秋两季大致呈现出先上升后下降的单峰曲线状态,其中CK模式与其他间作模式有显著差异,胞间二氧化碳浓度(Ci)日变化趋势为“U”型曲线,皆是先下降后上升。春秋两季不同间作模式下茶树叶片的栅栏组织厚度、叶片厚度都显著低于CK纯茶园模式;春季PAR与TPT、P/S、CTR呈显著正相关,与CLR呈显著负相关,秋季Pn与CTR呈显著正相关。【结论】不同间作模式有效地影响了茶园茶树的光合有效辐射通量、叶片温度、净光合速率、蒸腾速率、气孔导度、胞间二氧化碳浓度,其中以MT和DT两种间作模式下的茶树影响效果较为显著。不同的间作模式下生长的茶树会逐渐改变叶片形态以适应不同的环境特征;茶树叶片解剖结构与光合生理之间有一定的相关性,在一定时期和范围内,栅栏组织厚度、下表皮细胞、栅海比、组织结构紧密度可作为判断叶片光合能力的重要指标。

    Abstract:

    【Objective】 To explore the changes in photosynthetic physiology and leaf structure of tea trees under different intercropping patterns. 【Methods】Four intercropping modes, namely, R delavayi-tea(MT), winter cherry-tea (DT), walnut-tea (HT), and pure tea plantation (CK), within the planting range of the Cherry Blossom Valley of Mount Wuliang in Nanjian County, Yunnan Province, were investigated through the study of leaf anatomy of tea trees and the changing law of the tea tree"s photosynthetic physiological and ecological functions under different intercropping modes. 【Results】The three intercropping modes significantly reduced the photosynthetically active radiation flux (PAR) and the temperature of tea tree leaves (TL) in the spring, and the net photosynthetic rate (Pn), and transpiration rate (Tr) of different intercropping modes in the spring and autumn roughly showed a single-peak curve with a rise followed by a decline, in which the CK mode differed significantly from the other intercropping modes, and the daily change of the intercellular carbon dioxide concentration (Ci) showed a U-shaped curve, with the first decline and then increase. The thickness of fenestrated tissue and leaf thickness of tea leaves in different intercropping modes in spring and autumn were significantly lower than that in CK mode; PAR was significantly positively correlated with TPT, P/S and CTR in spring and negatively correlated with CLR in autumn, and Pn was significantly positively correlated with CTR in autumn. 【Conclusion】Different intercropping modes effectively affected the photosynthetically active radiation flux, leaf temperature, net photosynthetic rate, transpiration rate, stomatal conductance, and intercellular carbon dioxide concentration of tea trees in tea plantations, among which the effects were more significant in the two intercropping modes of MT and DT. Tea trees grown under different intercropping modes will gradually change leaf morphology to adapt to different environmental characteristics; there is a certain correlation between the anatomical structure of tea tree leaves and photosynthetic physiology, and the thickness of palisade tissues, lower epidermal thickness, ratio of palisade to sponge tissue ,and the cell tense ratio can be used as an important index for determining the photosynthetic capacity of the leaves in a certain period of time and within a certain range.

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肖梦娜,扈月豪,蓝增全,等.不同间作模式对茶园光合作用及叶片解剖结构的影响[J].西北植物学报,2024,44(11):1703-1713

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  • 收稿日期:2024-07-02
  • 最后修改日期:2024-08-14
  • 录用日期:2024-08-27
  • 在线发布日期: 2024-09-26
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