Abstract:

It was observed in the 3-year-old Prunus persica var. nectarine ‘Huyou 018’ which was open centre model about skin color index, the rate of creaking fruit and disease incidence. The canopy was divided sunny slope area and shady area for 12 space region separately to statistical analysis. It was shown that the sunny slope fruit number and yield were 74.9% and 68.2% higher than shady side, in the vertical direction, the fruit was mainly set in the upper part and middle part, in horizontal direction the fruit was mainly set in the central part. The indices of crack fruit and disease index in shady side was 24.7% and 80.1% higher than sunny side. The skin color index, the rate of creaking fruit and disease incidence were higher in top than bottom, external than internal. The height from ground to fruit position had significant negative correlation with the disease incidence, and the distance from fruit position to center had a positive correlation with the rate of cracking fruit. The weight of single fruit had significant positive correlation with skin color index and the rate of cracking fruit, the rate of creaking fruit had positive correlation with disease incidence. Plant Prunus persica var. nectarine ‘Huyou 018’ in the coastal area of east Zhejiang need to notice to modifying tree form, thinning flower and fruit properly, strengthening summer pruning and preventing and treatment pests and diseases such as the scab in time.