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田间自然条件下在葡萄园群体水平上多年的研究证明：叶幕ＰＡＲ光能截留率与葡萄群体净光合速率、叶幕和单叶ＰＡＲ光能截留率与果实干物质总量占地上部生物量干重的百分比、与果实总糖产量占果实本身干物质总量的百分比、以及与果皮色素产量占果实本身干物质总量的千分比之间呈现显著或极显著的线性正相关关系。说明利用叶幕结构变异调节叶幕ＰＡＲ光能截留和分配，可以对光合同化物源库关系和果实中物质代谢方向进行有效的调控。ＰＡＲ光能截留率较高和分配合理的叶幕，不但通过较高的群体光合速率为产量和品质形成提供了丰富的同化物“源”，而且通过调节器官间“库”关系使同化物以较高的比例流向果实，同时使果实中物质代谢过程有利于合成构成品质的要素
Years of natural field conditions in the field of vineyards proved that: PAR retention of leaf light and net photosynthetic rate of grape population, leaf curtain and single leaf PAR light retention and total dry matter of the plant biomass accounted for aboveground biomass The percentage of dry weight showed a significant or extremely significant linear positive correlation with the percentage of total sugar content of fruit in the total dry matter content of the fruit itself and the percentage of pericarp pigment content in the total dry matter content of the fruit itself. The results showed that the leaf photosynthesis can be effectively controlled by controlling the source and sink of photosynthetic compounds and the material metabolism direction in the fruits by adjusting the leaf light PAR interception and distribution by the leaf structure variation. The high light PAR retention rate and well-distributed leaf screens not only provided a rich source of assimilates for yield and quality formation through higher population photosynthetic rate, but also facilitated the assimilation of A higher proportion of flow to the fruit, while the fruit in the process of material metabolism is conducive to the composition of the elements of quality