遮阴对烈香茶花光合作用参数日变化的影响  

Effects of Shades on Diurnal Variation of Photosynthesis Parameters of Camellia japonica ‘Liexiang’

作　　者：李彪 黄永韬[2] 黄永芳[2] 龚海光[2] 

机构地区：[1]广东省林业厅,广东广州510173 [2]华南农业大学林学院,广东广州510642

出　　处：《广东林业科技》2013年第3期49-52,共4页Forestry Science and Technology of Guangdong Province

基　　金：广东省林业科技创新专项(2011KJCX014-01);广东省科技计划项目(2011B020302003)

摘　　要：以烈香茶花为材料,研究遮阴对烈香茶花光合作用参数日变化的影响。结果表明:遮阴没有改变烈香茶花光合作用参数日变化趋势。净光合速率日变化呈现双峰,并出现午休现象;蒸腾速率与气孔导度的日变化呈现相同趋势,为单峰曲线;而胞间CO2浓度日变化趋势呈现W型趋势。不同处理下的烈香茶花最大净光合速率分别为3.77(全光照),3.18(40%光照),3.08μmol CO2.m-2.s-1(80%光照)。In this paper, the shading effects on photosynthetic parameters of Camellia japonica ＇ Liexiang＇ were investigated. The results show that shading didn＇t influence photosynthetic parameters. The net photosynthetic rate presents double-peak curves and midday depression; both transpiration rate and stomatal conductance present single peak curves; and intercellular CO2 concentration appears to vary with a W-shaped curve. The peak photosyn- thetic rate of full illumination, 40% illumination and 80% illumination was 3. 77, 3. 18 and 3. 08 ixmol CO2 ~ m- 2 . s- 1, respectively. The double-peak photosynthetic rate curves show that the photosynthetic rate of 80% illumination was lower than 40% illumination at noon. Therefore, an appropriate shading treatment was good for growth of Camellia japonica ＇ Liexiang＇ during hot spell summer.

关 键 词：遮阴 烈香茶花 光合作用 参数 日变化 

分 类 号：S718.43[农业科学—林学]