摘要
为探讨不同套种模式生态茶园光合有效辐射特征及其差异,分别在西双版纳勐海县选取人工套种的沉香-茶树、樟树-茶树、千斤拔-茶树以及纯茶园样地,在干热季、雨季和雾凉季分别同步测定光合有效辐射,结果表明同一样地不同季节的光合有效辐射量差异较大.在雾凉季,各样地的光合有效辐射的数值较低,以樟树-茶园模式为最小,而干热季总体上数值较大.各套种模式光合有效辐射日总量则呈现千斤拔-茶树模式最大,樟树-茶树模式为最小.干热季光合有效辐射最强,在纯茶园日总量可达38.57 mol·m-2·d-1;但雾凉季近地层光合有效辐射最弱,在遮蔽较小的千斤拔-茶树模式日总量仅为23.03 mol·m-2·d-1.不同套种模式光合有效辐射与纯茶园的比值具有较大差异.干热季,樟树-茶树模式的光合有效辐射仅为纯茶园的65.9%,雨季为76.0%,雾凉季为87.2%.而千斤拔-茶树模式的光合有效辐射在干热季、雨季和雾凉季则分别为纯茶园的90.2%,91.2%和99.9%.各套种模式光合有效辐射的比值均是干热季<雨季<雾凉季.
The diurnal and seasonal variations of photosynthetic active radiation （PAR） in the three seasons （ hot - dry season, rainy season and foggy - cool season） were observed in a monoculture tea plantation and three different tree and tea mixed plantations （Chinese eaglewood -tea, Camphor tree -tea, tea） in Xishuangbanna. The results showed obvious seasonal variations in 4 plantations. The lower PAR appeared in the foggy - cool seasons, of which the lowest value was in the camphor tree - tea. As a whole, PAR was higher in hot - dry seasons. The diurnal accumulation of PAR was highest in the Flemingia macrophylla - tea pattern, and relatively low in the camphor tree - tea pattern. In hot - dry seasons, the diurnal accumulation of PAR was highest in monocuhure tea plantation （38.57 tool ~ m -2 . d -1 ）. In foggy - cool seasons, however, the diurnal ac- cumulation of PAR was lowest in Flemingia macrophyUa -tea pattern （23.03 tool ~ m-2 ~ d-l）. The PAR ratio in camphor tree - tea plantation was 65.9 % ,76.0% and 87.2 % to that of the monocuhure tea plantation in hot - dry seasons, rainy seasons and foggy - cool seasons respectively, which had the lowest value to all other pat- terns. However, comparing to the monoculture tea plantation, the PAR ratios of Flemingiamacrophylla - tea pattern were 90.2 % ,91.2 % and 99.9% to that of the monoculture tea plantation in hot- dry seasons, rainy seasons and foggy - cool seasons respectively,which was the highest of all patterns. PAR ratios were ranked as hot - dry season 〈 rainy season 〈 foggy - cool season by all the patterns.
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第1期144-148,共5页
Journal of Yunnan University(Natural Sciences Edition)
基金
西双版纳州科技局项目(YX200902)
中国科学院农业项目办公室项目(KSCX2-YW-N-48-06)
国家自然科学基金(41001063)
关键词
生态茶园
光合有效辐射
西双版纳
套种模式
ecological tea plantation
photosynthetically active radiation
Xishuangbanna
intercropping
