Results The quality of the female vines Most varieties choose the vines that are fully mature, full, small pith, free from diseases and insect pests, with a diameter of about 1 cm as the fruiting female vines; a few varieties such as Yongyou 1, Kyoho, etc., the female vine diameter is 0.9 cm thick The left and right sides are better, the branches and vines above 1 cm tend to increase seedless fruit and aggravate fruit drop.
According to the characteristics of flower bud differentiation and the frame type, the result is determined by the number of female vines and bud eyes. Varieties with good flower bud differentiation, such as European and Asian hybrids and most Eurasian species, mainly pruning 5-6 buds in the middle shoot, combining the middle and short shoots, and stay 3 Short shoot pruning can account for 15% to 20%; for varieties with insufficiently stable flower bud differentiation, such as Meirenzhi grape, choose mature branches, mainly pruning with long shoots of 10-12 shoots, combined with pruning with 3-5 shoots. "V"-shaped frame, high and wide hanging frame: In winter, the branches and vines near the main trunk are selected as the fruiting vines, and the branches and vines far away from the main trunk are cut off together with the original fruiting vines. Tie the branches and vines that have been trimmed with long tips evenly on the shelf, leaving a space of about 20 cm between the two plants, and cannot extend to the shelf of the next plant. Horizontal scaffolding: stay close and not far away. The branches and vines near the main trunk are used as the fruiting vines. The branches and vines far away from the main trunk are cut off together with the original fruiting vines, and the branches and vines are evenly tied on the shelf surface. For example, Victoria, Ruby Seedless, Hutai No. 8, young trees in the first year, horizontal scaffolding, generally leave about 1800 fruiting vines per mu, each fruiting vine leaves 3 to 4 buds, and 6000 per mu Effective shoots.
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Red Star apple variety originated in the United States and was introduced to Qingdao in 1982. It is mainly distributed in Jiaonan, Laixi, Pingdu, and Jimo. It is one of the main apple varieties grown in Qingdao. The average weight of a single Red Star apple is 190 grams, with some reaching up to 500 grams, and the fruit shape index is around 1, with a conical shape. The fruit surface is smooth, with thick wax, abundant bloom, deep and wide calyx cavity, and prominent five ridges. When the fruit first turns red, there are distinct intermittent red stripes, followed by a red blush, and when fully colored, the whole fruit is deep red with prominent purple-red coarse stripes, a glossy surface, and light brown or gray-white fruit dots. The flesh is pale yellow, crisp, juicy, and sweet.
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