Chilling injury of peach fruit during storage
Peach belongs to respiratory jump type fruit, which has respiratory peak and poor storage tolerance. It can only be stored for a few days at room temperature, and most varieties can only be stored for 15 days under 0 ℃. The enzyme activity and respiration of postharvest peach fruit are very strong, so the fruit is easy to become soft, rotten at room temperature, low temperature, low oxygen, high carbon dioxide can inhibit beard effect and enzyme activity. Under the condition of 0 ℃, the film bag is used for controlled atmosphere storage, 1% 2% oxygen and 3% 5% carbon dioxide are controlled, and ethylene absorbent is applied, which can be stored for 2 months, but attention should be paid to prevent the occurrence of cold injury.
The freezing temperature of peach ranges from minus 1.2℃ to minus 1.7℃. The fruit is more sensitive to low temperature than other fruits. Sometimes chilling injury occurs at 7 ℃, and chilling injury occurs at 3 ℃ ~ 4 ℃. On the contrary, chilling injury occurs less when it is below 0 ℃, but chilling injury occurs when it is below 0 ℃ for a long time. The symptoms of chilling injury are saccharification (powdery deterioration or wood dregs). Some fruits are characterized by hardening of pulp, browning of pulp and vascular bundles, cracking of peach stone, bitter taste or peculiar smell.
Peach fruit is easy to lose water, and when stored at low temperature, the relative humidity is controlled between 90% and 95%, in order to prevent fruit from water loss and shrinkage, too high humidity will cause rot, and the combination of low temperature and controlled atmosphere storage can prolong the storage life of peach.
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Management Technology of Peach in greenhouse
First, early cultivation, early forming, early fruiting because of the high density of peach trees in the greenhouse, in order to obtain higher income in the early stage, plastic shaping and flower breeding should be completed within a year, with rapid growth and early formation in the early stage, and control growth in the later stage. In plastic surgery, no matter it is slender spindle shape or "Y" shape, the output should be put in the first place. We should not only pick the heart many times under the premise of adequate supply of fertilizer and water, promote more secondary and tertiary branches, but also consider the permanent results, that is, do not start the cultured branches and keep them at a certain level.
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Fruit economic characters of Xinchuan Zhongdao peach
The economic character of the fruit is that the fruit is large, and the weight of a single fruit is 260ml and 350g. Round or oval, the fruit top is flat, the suture line is not obvious. The fruit is bright red, colorful, smooth, less and short villi, yellow-white pulp, reddish near the core, semi-sticky core, small nucleus, edible rate as high as 97%, crisp and hard meat, juicy. It can be stored for 1015 days at room temperature with good merchandise and good resistance to storage and transportation. The fruit contains more than 13.5% sugar, less acid, 0.15%, sweet and sour palatable, special flavor and strong flavor.
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