西双版纳热带次生林林窗辐射特征初步研究

窦军霞; 张一平; 刘玉洪; 马友鑫

西双版纳热带次生林林窗辐射特征初步研究

1.
中国科学院西双版纳热带植物园, 云南, 昆明, 650223;中国科学院生态环境研究中心, 北京, 100085;中国科学院研究生院, 北京, 100039
2.
中国科学院西双版纳热带植物园, 云南, 昆明, 650223

基金项目: 中国科学院知识创新重大项目(KZCX1-SW-01-01A4);中国科学院知识创新项目(KZCX2-406);云南省自然科学基金(98C098M);中国科学院研究生科学与社会实践资助专项资助

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出版历程
- 收稿日期: 2004-02-05
- 修回日期: 2004-07-19

A PRIMARILY STUDY ON RADIATION CHARACTERISTICS OF CANOPY GAP IN A TROPICAL SECONDARY FOREST IN XISHUANGBANNA,SW CHINA

1.
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China;Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;The Graduate School of the Chinese Academy of Sciences, Beijing
2.
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China

摘要

摘要: 利用西双版纳不同季节热带次生林林窗、林内及旷地不同波长太阳辐射的实测资料,比较分析了热带次生林窗不同波长辐射特征。分析得出:热带次生林窗中央与北侧林冠下的不同波长太阳辐射量值在中午前后迅速达到最大后又急速下降的现象明显;林窗内不同波长太阳辐射日总量值均大于林内,小于旷地;林窗中央和北侧林冠下相比较,一般是北侧林冠下的各辐射要素总量值高于林窗中央;林窗区域的总辐射日总量在干热季最高,雨季和雨季后期次之,雾凉季时最小;林窗中央和北侧林冠下的红外辐射及可见光在总辐射中所占份额随季节的变化而不同,充分显示了林窗辐射环境的异质性;与旷地和林内相比,林窗内各测点的红外辐射在总辐射中所占份额高于旷地却低于林内,而可见光占总辐射的比值情况正好相反。
- 林窗 /
- 太阳辐射 /
- 热带次生林 /
- 西双版纳
Abstract: Based on the observation data of different wavelength radiation of canopy gap in a tropical secondary forest, in the interior of forest and meteorological station in different seasons in Xishuangbanna, the radiation characteristics of canopy gap were discussed. The results showed that the value of different wavelength radiation had the significant phenomenon that each radiation value reached the maximum rapidly then decreased quickly around the noon at the center and north edge of canopy gap. The values of daily amount of different wavelength radiation within the canopy gap were higher than those in the interior of forest, but smaller than those at meteorological station; Compared to the center, daily amount of radiation at north edge was usually higher; Daily total solar radiation at the center was the maximum in the dry-hot season, was higher in the rainy season and later rain season and was the minimum in the fog-cool season; The ratios of infrared radiation, visible light to total solar radiation varied with the seasons at the center and north edge of the canopy gap, which fully indicated the radiation environmental heterogeneity within the canopy gap. Compared with meteorological station and interior of forest, the ratios of infrared radiation to total solar radiation in the gap were higher than those of meteorological station, but lower than those of interior of forest, which were justly contrary to the ratios of visible light to total solar radiation.
- canopy gap /
- radiation /
- tropical secondary forest /
- Xishuangbanna

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参考文献(11)

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