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以无沙尘覆盖为对照,对阿月浑子叶片进行了人工沙尘覆盖处理试验,沙尘覆盖量分别为2,6,9,14,18mg/cm2,用LI-6400光合仪测定并分析了叶片光合参数。结果表明,阿月浑子叶片短时间沙尘处理后沙尘覆盖量在2~18mg/cm2时,叶片净光合速率一直呈下降趋势,滞尘量2mg/cm2至18mg/cm2上升时叶片的净光合速率(Pn)下降幅度34%至100%;叶片的胞间CO2浓度(Ci)和叶表温度则呈升高趋势,比对照分别增加80%和20%左右;气孔导度随滞尘量的增加呈下降趋势,蒸腾速率的变化趋势与气孔导度类似;沙尘覆盖对叶片的温度也有一定的影响,随着滞尘量的增加,叶片温度也增高。叶片非环式电子传递(ETR)和PSⅡ随滞尘量的增加先升高后逐渐下降趋势。
With no dust cover as a control, artificial dust cover experiment was conducted on the leaves of pistachio, dust coverage were 2,6,9,14,18 mg / cm2, respectively, with LI-6400 photosynthesis apparatus for the determination and analysis Leaf photosynthetic parameters. The results showed that the leaf net photosynthetic rate of Pistachio was reduced from 2mg / cm 2 to 18mg / cm 2 after a short period of dusting. The net photosynthetic rate The photosynthetic rate (Pn) decreased by 34% to 100%. The leaf intercellular CO2 concentration (Ci) and leaf surface temperature increased with the increase of 80% and 20% The trend of transpiration rate is similar to that of stomatal conductance. The dust cover has a certain influence on the temperature of the leaves. With the increase of the amount of dust, the temperature of the leaves is also increased. The non-cyclic electron transfer (ETR) and PSⅡ of leaves increased firstly and then gradually decreased with the increase of the amount of dust.