【摘要】 通过对渭北旱区多年生柿属君迁子及柿树的3个品种光合作用日变化规律的研究表明,不同柿树品种的净光合速率(Pn)日变化规律不同,火柿、水柿和君迁子均呈"中午降低"双峰曲线,而木洼柿的净光合速率从上午8:00开始一直下降;4种柿树的蒸腾速率在中午均表现为下降,柿树的光合作用受气孔因素和非气孔因素共同作用,4种柿树的净光合速率的季节变化在5月下旬至9月中下旬均呈单峰曲线变化,而在9月底至10月初的近成熟期又有小幅上升。柿树对渭北旱区的生态环境有一定的适应性。更多还原

【Abstract】 Studies on the photosynthetic features of persimmon in arid area of Weibei showed:different persimmon varities had different daily rules,the daily variation curve of net photosynthetic rate of "Huoshi" "Shuishi" and "Diospyros lotus" were declining shape at noon with double peaks,but "Muwashi" was declining gradully from 8:00 am. Variation of the transpiration were also declining shape at noon, the photosynthesis was limited by stomatal and no-stomatal factors; the seaonal variation of the four persimmons showed single peak during May-September , but had a few rising in late Septemble to October; persimmon had adapted to arid area of Weibei.更多还原