3种叶面肥对山楂品质及光合特性的影响

Effects of Three Foliar Fertilizers on Quality and Photosynthetic Characteristics of Hawthorn

本研究旨在探讨3种叶面肥对山楂光合特性及果实品质和产量的影响,以为山楂叶面施肥提供参考。试验对不同浓度的叶面肥处理下的山楂进行了光合速率、蒸腾速率、胞间CO_(2)浓度、气孔导度和单果重等指标测定。结果显示,在适宜浓度施肥处理下,山楂叶片的光合速率、蒸腾速率和气孔导度明显增加,同时胞间CO_(2)浓度降低。具体而言,鱼蛋白肽叶面肥表现最好,净光合速率和蒸腾速率分别提高了57.22%和57.51%;3种叶面肥均显著降低了胞间CO_(2)浓度。此外,施肥处理山楂单果重均显著增加,其中发酵黄腐酸叶面肥的效果最为显著,增长幅度最高达68.49%。喷施叶面肥明显提高了山楂果实的Vc、可滴定酸、花青素和可溶性固形物含量,其中以发酵黄腐酸叶面肥的促进效果最好。

This study aimed to investigate the effects of three foliar fertilizers on the photosynthetic characteristics,single fruit quality and yield of hawthorn,and provided references for foliar fertilization of hawthorn.The photosynthetic rate,transpiration rate,intercellular CO_(2) concentration,stomatal conductance and single fruit weight of hawthorn treated with different concentrations of foliar fertilizer were measured.The results showed that,under appropriate concentration fertilization treatment,the photosynthetic rate,transpiration rate and stomatal conductance of hawthorn leaves increased significantly,while the intercellular CO_(2) concentration decreased.Specifically,fish protein peptide foliar fertilizer showed the best performance,with a 57.22%and 57.51%increase in net photosynthetic rate and transpiration rate,respectively.The intercellular CO_(2) concentration was significantly reduced by the three foliar fertilizers.In addition,the single fruit weight of hawthorn increased significantly under fertilization treatments,and the effect of fermented fulvic acid foliar fertilizer was the most significant,with the highest increase rate of 68.49%.Foliar application of fertilizers increased significantly the content of Vc,titratable acid,anthocyanins,and soluble solids in hawthorn fruits,and the effect of fermented fulvic acid foliar fertilizer showing the best promoting effect.