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在新疆林业科学院佳木试验站,以7~8年生拉宾斯和艳阳为试验材料,利用Li-6400光合作用测定系统对2个樱桃品种(拉宾斯、艳阳)的净光合速率(Pn)、气孔导度(Gs)、胞间CO2的浓度(Ci)、蒸腾速率(Tr)和水分利用效率(WUE)以及光响应曲线6个生理指标的测定分析。结果表明:拉宾斯与艳阳的Pn、Gs均呈极显著差异,Ci、Tr、WUE均无显著差异;拉宾斯的Pn呈“单峰”曲线,艳阳的Pn呈“双峰”曲线,艳阳存在光合“午休”现象;拉宾斯、艳阳的Tr均呈单峰曲线分布,在整个日变化过程中拉宾斯的Tr比艳阳高;2个品种在11:00-13:00、15:00-17:00时,主要受到气孔限制的影响,Pn和Tr均出现下降;19:00-21:00时,随着外界光照辐射减弱,2樱桃品种的Pn和Tr再次出现下降;2种引种大樱桃中拉宾斯较艳阳而言是一种高光合、高蒸腾速率、高气孔导度的品种,且在高光辐射条件下不易发生光抑制,更有利于适应南疆地区高光照的外界环境。
The photosynthetic rate (Pn) of two cherry cultivars (Labs and Yan Yang) were measured by Li-6400 photosynthesis system at 7-8-year-old Labs and Yan Yang in Jiamu Experimental Station of Xinjiang Academy of Forestry. , Stomatal conductance (Gs), intercellular CO2 concentration (Ci), transpiration rate (Tr), water use efficiency (WUE) and light response curve of 6 physiological indexes were measured. The results showed that there were significant differences in Pn and Gs between Labins and the sun, and there was no significant difference between Ci, Tr and WUE. Pn of Labins showed a Trins of Laburnis and the sun were all unimodal curve distribution. Trins of Laburnis were higher than that of sunny in the whole diurnal variation process. The Trichoderma spp. At 11:00 -13: 00,15: 00-17: 00, Pn and Tr all decreased mainly due to stomatal limitation. From 19:00 to 21:00, with the decrease of external light radiation, Pn Tr again decreased; two species of cherry introduced Latin America than the sun is a kind of photosynthesis, high transpiration rate, high stomatal conductance varieties, and in high light radiation is not prone to light inhibition, more conducive to adapt High light in southern Xinjiang external environment.