Effects of V and T trellis on growth and yield of wine grape variety Lingfeng

ObjectiveEffects of V and T trellis on growth and yield of wine grape variety Lingfeng were studied in order to provide reference for wine grape planting in southern humid area. MethodThrough field observation, phenologi-cal phase,plant growth potential and fruiting characteristics were recorded under V and T trellis cultivation, and the yield and quality were also detected and analyzed. ResultUnder V trellis cultivation, germination stage, florescence, ve-raison and fructescence were 3-5 d ahead of T trellis cultivation. Under one year two harvests cultivation mode ,shoot sprouting rate and fruit branch rate of the first summer fruit in V trellis cultivation were 75.8% and 67.2% respectively, which were 1.8%(absolute value, the same below) and 5.1% lower than those in T trellis cultivation, the difference reached significant level(P<0.05,the same below). But the average yield was 20459.85 kg/ha, 4.90% higher than that in T trellis cultivation and the difference was significant. In T trellis cultivation , shoot sprouting rate of the second winter fruit was 86.5%, 0.6% higher than that in V trellis, but the difference was insignificant(P>0.05, the same below); fruit branch rate was 82.1%, 8.1%higher than that in V trellis, reaching significant level; the yield was 3.98% higher but the difference was insignificant. At low spots(70 and 100 cm) and high spots(100 and 150 cm) of light intensity measure-ment for summer fruit and winter fruit, the intensity in V trellis was significantly stronger than that in T trellis. The dif-ference in soluble solid was insignificant. ConclusionIn V trellis cultivation, the distribution of branches and leaves is even, relativity light intensity is high, which can improve grape yield and quality. Therefore, it can be promoted among wine grape planting regions in southern humid area.