Harvesting and Storage Technology of Grape
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The appropriate period for harvesting depends on the maturity of the species and the climatic conditions in each region. In the normal climate year in the central region of Jilin Province, it is suitable for harvesting period around September 5. The basis for judging the appropriate harvest period is that the berries are dark purple in color and the fruit powder on the peels is significantly increased. When the fruit is lightly pinched with fingers, it is elastic, and the mouthfeel is clear and fruity. The soluble solids content of the fruit juice no longer increases (Mountain Grapes The content of soluble solids in different varieties and different lines was 13%-18%). The harvest is too early, the fruit yield is low, and the economy suffers losses. Moreover, the fruit has low sugar content and poor wine quality, which is unfavorable to the processing industry. After harvesting too late, due to falling grains, skin shrinkage, fruit weight reduction, will also reduce the yield, but also affect the ripening of vines, adverse for the next year's high yield.
Harvesting method:
There is no separation between the spikes on the grapes and the branches of the fruit. When harvesting, it is necessary to grab the ear with one hand, and cut the ear stem with one hand. The grape fruit of the mountain is a berry and it should be handled gently during harvesting to avoid mechanical damage. At the same time, prevent damage to foliage due to fruit harvest. The harvested fruits must be individually packaged and marked.
If the fruit needs to be transported at a relatively long distance, it is necessary to first support the cushion in the basket so that the fruit can be tightly packed without breaking the fruit. Too loosely installed is liable to cause threshing or broken fruit pieces in the loading and unloading of vehicles and transport. After being packaged, it should not be exposed to sunlight and rain, nor stored for a long time. It should be shipped to the processing site as soon as possible.