Effect of Different Leaves Pinching Bearing Branches on Cabernet sauvignon Fruit Quality in Shangri-La

Pinching bearing branch timely and reasonable is an important cultivation technique in cultivation and managing process. In order to solve the problem that local farmers pinch bearing branch is not timely and reasonable, Cabernet sauvignon plants were used as the experimental materials, local farmers cultivated plants was the control, we studied the effect of different leaves pinching of bearing branches on grape quality in Shangri-La, and ANOVA was conducted. The results showed when 4,5,6,7 or 8 leaves was leaved on single fruit branch. Comparing with the control, the values of total sugar, total phenol, anthocyanin and the ratio of sugar and acid were significantly high, and titratable acid content decreased significantly. Among them, when 6 leaves was leaved on single fruit branch, the values of total sugar, total phenol, the ratio of sugar and acid were significantly high, and titratable acid content decreased significantly, and the average grape weight and plant production all were more reasonable. When retained 4-5 leaves pinching, the total sugar, total phenol, pH value and sugar acid ratio and yield were low, fruit quality was poor compared with grape of 6 leaves. If retained 7 or 8 leaves pinching, yield was significantly high, but fruit quality was poor. Therefore, in order to improve grape quality we can retaine 6 leaves to pinch bearing branch timely.