Apply 30-50kg organic fertilizer, 0.5kg urea solution and 0.5kg phosphate fertilizer1.5kg per plant. At the early growth stage (before May), 0.75 kg urea solution was applied to the plants to promote the growth of new shoots. After June, phosphorus fertilizer 1.5 kg and ammonium sulfate 1.2 kg were applied to each tree. The water management method should incorporate the characteristics of neither waterlogging nor drought tolerance of big cherry, and the air humidity of soil layer should be adjusted between 60% and 80%. From germination to early flowering, water can be poured once according to the soil humidity, so that the soil air humidity is about 80%, and then the soil air humidity is controlled between 60% and 70%.
Summer pruning: summer pruning should be integrated into the plastic surgery process, and the main branches should be closed at 70 degrees up and down. When the branch length is less than 50 cm, core should be taken, and the top of the branch should be 10 cm. When cutting short branches in winter, you should cut them up and down by 40-50 cm to keep the branches tight. Avoid exposing the back.
Branching: Before light summer or August-September, the main branches are opened to prevent the main branches from closing and the lower branches from withering. Pulling branches can improve the germination rate, the total number of short branches, promote early fruiting, improve the ventilation and light transmission standard in the crown, improve the quality of branches, avoid internal baldness, alleviate the displacement of fruiting position, improve the reasonable fruiting amount and improve the benefit and quality. Pulling strong branches can alleviate the upward trend of branches and balance plant types. The closing angle of the auxiliary branch should be 80-90 degrees.
Tooth grafting: before budding, cut a knife at the top of the bud and branches and leaves to reach the phloem to promote the germination of new buds. Tooth grafting can improve the quality of lateral buds or foliage branches, increase the proportion of medium and long branches and the total number of branches, which is beneficial to the shaping and filling of gaps in crown.
Picking: For the strong branches in the trunk, continuous coring can be realized. Tap long branches and middle branches from the teeth to the back of 15-20 cm to shape large, middle and small branches, improve reasonable fruit setting and promote early fruiting and early production. Picking flourishing branches can promote the growth of branches, increase the total number of short branches, alleviate the rise of the whole tree, and achieve the goal of early fruiting. For vigorous branches, you can pick your heart 2-3 times a year. In order to improve the rate of fruit hanging, the time of picking the heart must be limited to 10- 15 days after flowering. Significantly reduce nutrient consumption, reduce physiological fruit loss, fruit ripens early, and the flowering rate of the sprouted secondary branches is high.
Thinning: Thinning the long branches that have been growing for many years, the trunk that is too dense, too strong, and chaotic is extremely beneficial to adjust the stem structure, improve the plant type balance under sunlight, and promote flower bud differentiation. In the first half of June, the branches became thinner and the wound healed very easily. For healthy long branches in the crown that obviously affect ventilation and light transmission and have no reserved use value, they can be drained from the tip.