Study On The Technologies Of High-yield And High-quality In The Dense Apple Orchard

To resolve several mostly problems of the fruit production at Feng Xian of Jiang Su province, we studying on the soil status, soil nutrition, the harm of the fruit production by heavy metal pollution, the effect on fruit production by fertilizing the orchards and the effect by pruning in the dense orchard .This study will support technologies to fruit production of Jiang Su province . 1. Study on the physic-chemical properties of the soil of the orchardThe researches shows that the Feng Xian orchard are existing some soil problems, for example: Firstly, the contents of the soil organic matter are low. Secondly ,the pH of the soil are above 8.0 and the saline and alkali properties of the soil are low. Thirdly, in production, although Calcium is seriously lack in the overground part of the fruit trees of our county, especially the rate of the Bitter Pit disease of bagged fruits in the very few orchard up to above 60%, but from the measurement results to see, the content of Calcium in soil at Feng Xian is comparatively abundance. The last, the contents of potassium fertilizer is obviously shortly. 2.Test work on planting grass and covering grass in orchardFor modify the physical and chemical properties of the dense orchard soil structures and improve the contents of the soil organic matter, put up two years test work on planting grass and covering grass in orchard. The results shows that planting grass and covering grass in orchard obviously react on improve the contents of the soil organic matter and reduce the PH of the soil. play a remarkable role in the yield of fruit tee. 3. Trial on potassium fertilizer applied in orchardBased on the analysis results of the investigations of the dense orchard soil conditions, put up formulated fertilizer applying, designed five treatments . The results shows that increased definitely Potassium Fertilizer will bring comparatively increase production effect and the yield-increasing effect of sulphate-potassium comparatively preceded to potassium chloride. And potassium have a comparatively effect to improve the inherent quality of fruits.