遮阴对兔眼蓝莓光合特性的影响1）

摘要

选取兔眼蓝莓品种‘灿烂’为材料，研究了遮阴处理对兔眼蓝莓光合特性的影响。结果表明：春夏秋三季，在100％与80％光照强度下，净光合速率日变化有两次峰值，具光合午休现象，在60％及40％光照强度下，光合午休现象消失，冬季各处理均无光合午休现象；净光合速率与胞间CO2摩尔分数呈极显著负相关变化趋势，与蒸腾速率呈正相关性；7月份蓝莓光合作用最强，11月份最低。80％全光照强度较适合兔眼蓝莓的栽培。%With “Brightwell”, one of the rabbiteye blueberry, we studied the effect of shading on the rabbiteye blueberry.In spring, summer and autumn, the diumal variation of Pn appeared to be a double peak curves under 100% and 80%of light intensity, disappeared under 60%and 40%, and there was no midday depression of photosynthesis in winter by any treat-ments.There was significantly negative relationship between Pn and Ci, and there was also positive relationship between Pn and Tr .The strongest photosynthesis was in July, and weakest in November.The most preferable cultivation pattern was un-der 80%of light intensity for rabbiteye blueberry.