摘要
茶果（林）复合园上层林冠透光率落叶树种比常绿树种高２～１５％，春季可高出３０％左右，透光率维持大于５５％水平对茶叶产量影响不显著．林冠下的散射量１２～１４时已超过２．９Ｊ·ｃｍ－２·ｍｉｎ－１的茶树光饱和点水平落叶树下散射光量占总辐射量春季达６５～８０％，夏、秋季４５～６０％茶树树冠面反射光量占总辐射量比例小，晴天约为５～８％，年变辐为５～１０％，日变幅以１０～１５时最高，夏、秋季高达０．２～０．４Ｊ·ｃｍ－２·ｍｉｎ－１茶树树冠透射光量在５００～２０００ｌＸ，日变化以１６～１７时透射率最高约１５～２０％，茶树吸收光占总量８０～８５％
The transmissivity of the deciduous trees in the upper canopy of tea-fruit tree or-forest complex garden is 2～15 % higher than that of the evergreen trees, up to 30 % especially in spring. The transmissivity had not remarkable effects on the tea yield, when it was kept more than 55 %.The amount of scattered light under canopy at 12 am～2 pm is more than the 11ght saturation point 2. 9 J. cm- 2· min-1 of tea tree. The amount of scattered light in deciduous trees reaches to 65～80% of total radiation in spring, 45～60 % in summer and autumn. The amount of reflected light of tea tree canopy occupies a small part of total radiation, about 5～8 % in sunny days, wilhin annual range of 5～10 %. The maximum range of daily change is at 10 am～3pm, which reaches to 0. 2～ 0. 4 J· cm- 2· min-1 in summer and autumn. The transmission of tea tree canopy is 500～2000 lux. The maximum range of daily change of transmission is 15～20 % of total radiation at 4～5 pm, and the amount of absorbed light is 80 ～85 %.
出处
《应用生态学报》
CAS
CSCD
1996年第4期359-363,共5页
Chinese Journal of Applied Ecology
基金
安徽省教委基金
关键词
茶树
茶林复合园
光辐射
Tea-fruit tree or-forest complex garden, Light radiation, Composition.
