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【目的】研究葡萄在帕米尔高原非耕地设施延晚栽培条件下的光合作用适应性,探讨光合作用光响应特征。【方法】在帕米尔高原戈壁温室延晚栽培条件下,以3 a生‘红地球’、‘克瑞森’、‘木纳格’、‘秋黑’和‘里扎马特’葡萄为试材,测定并研究了开花期葡萄叶片光合作用光响应情况,首次将弗伦德利希(Freundlich)模型引入光合作用研究。【结果】光照强度在95~543μmol·m-2·s-1时,各品种光能利用效率有所提高;‘克瑞森’、‘木纳格’的暗呼吸速率较高;‘红地球’净光合速率在光照强度大于光饱和点(2 287μmol·m-2·s-1)后开始缓慢下降。【结论】‘木纳格’光能利用率最高;‘克瑞森’和‘木纳格’光合产物的夜间消耗较大;‘红地球’存在光抑制现象,当光强超过其饱和点时,适当遮阴将有利于‘红地球’的光合作用。
【Objective】 The objective of this study was to investigate the photosynthesis adaptability of grapes in late-growth cultivation of non-cultivated land in the Pamirs and to investigate the photoresponse characteristics of photosynthesis. 【Method】 Under the condition of delayed cultivation in Gobi hothouse of Pamirs Plateau, 3-year-old ’Red Globe’, ’Krissen’, ’Minag’, ’Qiu’hai’ and ’Rizmat’ grapes were tested The light response of photosynthesis in flowering grape leaves was measured and studied. For the first time, Freundlich model was introduced into photosynthesis research. 【Result】 The results showed that the light use efficiency of all cultivars increased with the light intensity of 95-545 μmol · m-2 · s-1. The dark respiration rate of ’Kerisen’ and ’Munch’ The net photosynthetic rate began to decline slowly when the light intensity was higher than the light saturation point (2 287μmol · m-2 · s-1). 【Conclusion】 The highest utilization rate of light energy is in ’Munchag’; the nighttime consumption of ’Krusen’ and ’Munchag’ photosynthesis products is large; and the ’Red Earth’ has light suppression phenomenon. When the light intensity exceeds its saturation point Appropriate shading will be beneficial to the photosynthesis of the ’Red Earth’.