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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (16): 52-56.

所属专题： 园艺

• 林学 园艺 园林 • 上一篇    下一篇

不同郁闭度林茶复合模式对茶树光合日变化的影响

马跃 刘志龙 虞木奎 徐庆玲 傅强 赵樟   

  • 收稿日期:2010-12-19 修回日期:2011-03-03 出版日期:2011-07-05 发布日期:2011-07-05

Effects of Different Canopy Closure on Photosynthetic Diurnal Variation of Tea in Forest-tea Compound Model

  • Received:2010-12-19 Revised:2011-03-03 Online:2011-07-05 Published:2011-07-05

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摘要：

茶叶的产量和品质与生长环境关系非常密切，为探明林分不同郁闭度对茶树光合日变化的影响，本研究以不同郁闭度的栾树（Koelreuteria paniculata）-茶（Camellia sinensis）复合系统中茶树为材料，纯茶园为对照（CK），利用便携式LI-6400光合作用测定仪研究茶树分别在0.3（T1）、0.6（T2）和0.9（T3）郁闭度条件下的光合作用参数日变化。结果表明：随郁闭度增加，茶树光合有效辐射（PAR）和叶片温度（Tl）日均值和差值呈递减趋势，日变化呈单峰曲线；茶树净光合速率（Pn）日均值随郁闭度增加呈递减趋势，均表现双峰型曲线；CK和T1的蒸腾速率（Tr）和气孔导度（Gs）日变化午间受到明显的抑制且呈双峰曲线，T2和T3呈单峰型曲线。

关键词: 夏玉米, 夏玉米

Abstract:

The production and quality of tea were very close to growing environment, in order to clarify the effects of different canopy closure on photosynthetic diurnal variation of tea in forest-tea compound model, this study by using the LI-6400 portable photosynthesis system, the effects of different canopy closure, 0.3(T1), 0.6(T2) and 0.9(T3), on photosynthetic diurnal variations of tea plants in Koelreuteria paniculata-Camellia sinensis compound systems were studied, with pure tea garden as the control. The results were as follows: with canopy density increased, daily mean value and difference value of radiation (PAR)，leaf temperature (Tl) had a descending trend, diurnal variation showed single peak curve. Net photosynthetic rate (Pn) decreased with canopy closure increased and showed double-peak curve. Contrary to T2 and T3, stomatal conductance (Gs) and transpiration rate (Tr) were inhibited obviously and showed double-peak curve under CK and T1 treatment.