To slim postharvest nectarine in Greenhouse
Post harvest pruning: conventional pruning, thinning thin branches, insect pest branches, dead branches, drooping branches, dense branches and peripheral excess branches, open light path, is conducive to flower bud differentiation. The original by 4 - the results of the six branches of branch level reduced to 2 - 4 branches, retraction branch group, the Chouchi Mie when 2 - 4 shoot for a short cut, promote new branches, new branch group culture. The lower part of the crown of the large results after the branch of the results if sagging, to its support, so that its recovery. Dense rods often appear on the strong weak phenomenon, it is important to cut the upper branches, inhibiting growth.
Heavy pruning method: high-density cultivation of Nectarine in greenhouse by heavy pruning trunk and Y-shaped pruning method. After harvesting, the group returned to the base of 2 to 3 buds (5 to 10 cm long) to germinate the single bud or latent bud of the base. Branch growth, new slightly longer than 30 cm in foliar spraying of 15% Paclobutrazol 100 to 300 times liquid of 2 - 3 times, late spraying KH2PO4 promoted formation of flower bud. Return to the shrinkage can be carried out step by step, one is to cut one side, 7 days later cut the other side; two is to cut the lower branches, 7 days after the upper branches cut. But the upper part of the first thinning a portion of the upper baffle branches, especially strong weak, but also to thinning a portion of the upper Wang, prompted the lower germination. Every time when a few leaves are cut intact twigs as a source of manufacturing organic nutrients, can not be a light cut. With the method that is a branch, the inferior branch cut, a broken branches, to 10 cm when the bud sprouting and then cut broken branches.
Base: topdressing with postharvest cut, a ditch fertilization. Between the lines dug 50 centimeters long and 30 centimeters wide, 25 - 30 cm deep groove. If the thinning spacing large, the fertilizing ditches can be relaxed, row spacing in 2 - 3 meters, digging a ditch, ditch applying decomposed organic fertilizer and nitrogen, phosphorus and potassium fertilizer, per plant 0.25 - 1.5 kg.
Scientific fertilization watering: digging ditch, put in the film completely clean, then loosen the soil. After fertilization, the whole garden irrigation water, according to the weather conditions in a timely manner. When summer and autumn rain for a long time, to do the work of flood drainage.
Timely control: in summer and autumn, nectarine in sufficient water and fertilizer conditions, vigorously growing shoots. Therefore, it is necessary to control and promote flower bud formation, generally from the beginning of July 15, 150 - 300 times liquid spraying of 15% Paclobutrazol, sprayed once every 15 days, St 3 times. If the last condition still not under control, should strengthen the control of a jet.
Uncovering the film, Caoshan, film and wall management: 5 days after picking, increase the amount of ventilation, the shed temperature from the original 15 - 30 degrees for 10 - 25 degrees. When the shed temperature close to shed the outdoor temperature, tear off the film, let peach returned to the natural environment in growth, peeled off the grass thatch dried rolled up after, stored in a dry and ventilated place. Too much rain during the rainy season, but also took out Liangshai, to avoid damp moldy, and pay attention to prevent being rodents. Film removed clean backup, use only a year the best films. Bamboo scaffolding, in second years to inspect the shed before, found broken or damage to timely repair. Steel scaffolding to brush rust rust. Especially the wall wall to do work in the summer rain, in order to avoid collapse.
Anti pest: greenhouse nectarine main disease and insect pest hawthorn spider mite, latent leaf e, tortrix, leafhoppers and bacterial perforation disease, scab, flow gum disease, dry rot and so on. Prevention of hawthorn spider mite, in late August winter female adults started from the tree and climb, on the tree stem grass tied to the trapping; aphid control can be in early October alate moved back to the peach tree spawning with sunshade net (usually with 8 - 10 years) covering the peach.
Close planting garden thinning: high-density cultivation of Nectarine in greenhouse can be solved by thinning light. Thinning out the Nectarine Tree Root to pick a net, leaving the tree hole cold for a period of time after application of organic fertilizer, in order to strengthen the retention tree growth potential.