遮荫及叶施蔗糖对桃果实产量及品质形成的影响

he influence of shading and foliar application of sucrose on fruit development and quality of ‘zhonghua shoutao’ peaches [Prunus persica (L.) Batch.] was studied in four different stages. Two-year-old potted peach trees were shaded with two levels of light intensity (30% and 50% of nature light), and sucrose was foliar sprayed on these trees with three different densities (0, 0.5% and 1%). The results showed that the percentage of pollen germination and the setting percentage decreased when trees were shaded during the sprout and abloom stage. Shading also decreased soluble solid matters, soluble sugars, titratable acids and anthocyanin content, and average fruit weight of ripe fruits during the last period of fruit development. The yield and quality of peaches were also influenced by shading and decreased. Foliar application of sucrose weakened the influence of shading. It was good to improve setting percentage, yield and fruit quality. All these results showed that foliar application of sucrose was helpful for fruit development and quality of shaded peach trees.