摘要
阿月浑子叶片光合速率日变化呈双峰曲线， 最高峰在１１ 时， 次峰在１５ 时， 中午有明显的“午休”现象； 季节变化亦呈双峰曲线， 最高峰在６ 月， 次峰在８ 月；６ 月份枝条中部叶片光合速率大于顶部和下部叶片。光合作用的光补偿点和饱和点分别为５１ μｍｏｌ·ｍ － ２·ｓ－ １ 和１ ６００ μｍｏｌ·ｍ － ２·ｓ－ １ ， ＣＯ２ 补偿点和饱和点分别为１３６ μＬ／Ｌ 和８３０ μＬ／Ｌ； 光合作用的最适温度为３０ ℃， 最适土壤相对含水量为７０％ ， 灌水临界期的土壤相对含水量为３０ ％ ～３５％ 。
The photosynthesis of pistachio( Pistacia vera L.)and the effect of environmental factors were studied.The results were as follows:the curve of diurnal variation of pistachio leaf photosynthesis showed two peaks,appeared at 11:00 and at 15:00 ,respectively;the curve of seasonal variation of Pn had two peaks,occurring in June and in August,respectively.Among all leaves in June,the photosynthesis of the leaves which located at the middle of shoots was highest.The light compensation point of photosynthesis and light saturation point of pistachio leaves were 51μmol·m -2 ·s -1 and 1600μmol·m -2 ·s -1 ,respectively;The CO 2 compensation point of photosynthesis and the CO 2 saturation point in pistachio leaves were 136μL/L and 830μL/L;the optimum temperature of Pn was 30℃;the optimum SRWC of Pn was 70%,The critical level of SRWC,at which the plant needs irrigation,was 30%-35%.
出处
《园艺学报》
CAS
CSCD
北大核心
1999年第5期287-290,共4页
Acta Horticulturae Sinica
