欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 1996, Vol. 7 ›› Issue (4): 359-363.

• 研究论文 • 上一篇    下一篇

茶果(林)复合园的光特征研究

郭素英, 段建真   

  1. 安徽农业大学, 合肥230036
  • 收稿日期:1995-04-05 修回日期:1996-06-01 出版日期:1996-10-25 发布日期:1996-10-25
  • 基金资助:

    安徽省教委基金资助项目

Light characteristics in tea-fruit tree or-forest complex garden

Guo Suying, Duan Jianzhen   

  1. Auhui Agricultural University, Hefei 230036
  • Received:1995-04-05 Revised:1996-06-01 Online:1996-10-25 Published:1996-10-25

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着.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%.

关键词: 茶林复合园, 光辐射, 组成, 稳定同位素, 荒漠生境, 泡泡刺, 降水变化, 水分来源

Abstract: 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 500~2000lux. The maximum range of daily change of transmission is 15~20% of total radiation at 4~5pm, and the amount of absorbed light is 80 ~85%.

Key words: Tea-fruit tree or-forest complex garden, Light radiation, Composition, water source, precipitation variation, stable isotope, Nitraria sibirica, desert habitat