After harvesting the nectarine fruit in the greenhouse, the tree vigor needs to be restored, and the flower bud quality and tree structure of the next year must be considered. Therefore, the management of soil and fertilizer water, pest control, and pruning are very important at this stage. I. Postharvest pruning The result is that the tree has been formed within the unit area and the space is basically full. However, after the shelter is removed, it has the same growth time as the open field. If it is not pruned seriously, it will inevitably cause severe canopy closure. At this time, the outside temperature is low, and greenhouses need to slow down for a long period of time. This is a good time for moderate heavy shearing. 1. Conventional pruning method 1 to thin the weak branches, branches and branches, dead branches, drooping branches, over dense branches and peripheral branches, open the light path, is conducive to flower bud differentiation. 2 retraction branch group, that is, the original branch consisting of more than 4-6 result branches retracted into 2-4 branches, and left 2-4 buds in the group Wangwang stubby, promote new branches, cultivate into New branches. 3 The large branch of the lower part of the canopy may sag after the result, and will have to support and top to restore its growth. 4 dense planting tends to appear strong and weak under the weak phenomenon, this time to re-cut the upper Wang branch, strong to stay weak, inhibit growth. 2. Heavy shearing method 1 adopts a trunk shape and "Y" shape for high density cultivation. After the fruit is harvested, it is retracted to the base 2-3 buds (approximately 5-10 cm long) after the fruit is harvested, making the base single shoots or latent. The buds germinated and grew around the trunk and main branches. When the new shoots were grown to 30 cm in length, the leaves were sprayed with 15% paclobutrazol 100-300 times for 2-3 times, and potassium dihydrogen phosphate was sprayed later to promote flower bud formation. Two-fold retraction can be performed step by step. First, cut one side first, and then cut the other side one week later; Second, cut the branches and cut the upper branches one week later, but remove a part of the light-blocking branches first, especially on the upper part. When strong and weak, it is necessary to remove the upper part of the branches and promote the lower part to germinate. (3) A small number of fine twigs of leaves should be kept as a source of organic nutrients for each heavy shear, not shaved once. It is also possible to carry out the folding method, that is, to cut a part of the branch and cut it off, and then break off part of the branch, and then cut it when the new bud is germinated by about 10 cm. Second, top-dressing basal fertilizer combined with postharvest heavy shear, a trenching fertilization. Dig 50 cm long, 30 cm wide and 25-30 cm deep in the rows between the two trees. If the row spacing after thinning is larger, the fertilization ditch may be larger. When the row spacing is 2-3 meters, a ditch may be dug. The mature organic fertilizer is applied in the ditch, and nitrogen, phosphorus and potassium compound fertilizers are added, each 0.25-0.5 kg. Instrument Sample Cups,Ral Sample Cup,Ral Instrument Sample Cup,Ral Instrument Sample Container Yancheng Rongtai Labware Co.,Ltd , https://www.shtestlab.com