Thinning and thinning fruit is an important measure to improve the fruit setting rate and fruit quality of nectarine in greenhouses, especially for nectarine trees under the conditions of facility cultivation. Flowering time is often affected by factors such as temperature, humidity, light, and pollination, and fruit setting is unstable. Therefore, the thinning and fruit thinning of nectarines in greenhouses should be based on the principle of “light sparse flowering and heavy fruit thinningâ€.
Sparse flowering time is best in the bud period. When the amount of flower buds is large, most flower buds and long-medium fruiting branches on thin and thin branches can be sparsed, and the longer double flower buds and the late flowering buds with poor development can be eliminated.
The fruit sparsely saying goes: “Look at the tree to set the production, branch the burden, and keep the fruit evenly.†Only scientifically and reasonably thinning the fruit can reduce the nutrient consumption and improve the fruit setting rate and the quality of the peach.
The fruit thinning period is generally divided into two times. For the first time in 3 to 4 weeks after flowering, nectarines were made as large as apricot kernels. Can not be early sparse, early sparse easy to identify the size of the fruit and whether it is really fertilized fruit, easily lead to reduced production; sparse too late, peach fruit, waste of nutrients. The second fruit-shredding is the fixing of the fruit, which is carried out after the hard-core period of nectarine, and will dredge the overloaded fruit.
The amount of fruit leaving fruit should be determined according to the fruit setting rate, peach size, tree vigor, and tree size of nectarine varieties. Generally, 4 to 6 fruit branches are left, 3 to 4 fruits are left in the middle fruit branch, 1 to 2 fruit are left in the short fruit branch, and 1 fruit or no fruit is left in the fruit branch of the bouquet, and the fruit is prolonged. Stay too little, the fruit is big, but the yield is too low and the benefit is not good.
The method of fruit thinning should be based on the principle of "reserving good and bad". Peach fruit on the same branch spacing of about 10 to 15 cm. When thinning fruit, it is necessary to remove the deformed fruit, small fruit, disease and fruit first, then leave fruits according to the load rationally, leave more leaf fruits, and sparsely leaf fruit; leave lateral and lower fruit, and reconcile the fruit; Branches, weak branches. The order of fruit shrubs should be from the inside to the outside, and from top to bottom, branch by branch, in order to prevent leakage or damage the fruit.
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