Pear fruit preservation after pear harvest
The main objective of the fruit recovery garden is to protect the leaves. Whether or not the leaves can be effectively retained is directly related to whether the nutrients stored in the pear tree can meet the nutrient needs of flowering, fruits and other life activities in the following year. How can I do a good job of leaf protection? According to the work practices of previous years, several opinions were discussed for reference.
First, the hydrating work of pear orchards after fruit harvest is very important. Because the fruit is harvested at different levels, the wounds of the tree body, such as stalks, some leaves, and other wounds, are easily volatile. Because the pear fruit needs a large amount of effective water supply during the maturation process, the physiological function of the pear tree concentrates a lot. The effective water supply fruits, and artificially harvested the fruits, under the unprepared conditions of the pear tree, the tree is still water supply to the fruit direction, and because the fruit leaves wounds after harvest, the moisture is lost from the wound to cause water consumption. The fruit that we saw after harvest usually shrinks, which is caused by physiological loss of water. At this time, if the water supply is not enough, it will easily cause a large number of leaves off. In addition, fruit harvesting brings about a change in physiological function. For example, if water is insufficient for growth hormone, it will be turned to exfoliants, resulting in physiological defoliation of pear trees. When the leaf exfoliation rate reaches about 80%, the flower buds and leaf buds are transferred from the latent state. In the active state, the flowering in the fall takes place, new shoots are drawn, and the stored nutrients in the tree are consumed, thereby affecting the pear fruit production the following year, and the economy suffers losses. Therefore, after the fruit is harvested, the moisturizing work in pear orchards is very important.
The second is something that should be noted in post-harvest moisturizing work:
1, can not be applied within 15-20 days after harvest high-concentration fertilizer, which is usually referred to as post-harvest fertilizer. According to the physiological function of the tree, the recovery period of the tree's vital energy is 15-20 days after the harvest. When the tree's vitality is not restored, the application of high-concentration fertilizer is not only unfavorable to the recovery of the tree's vitality, but is counterproductive, resulting in the destruction of the normal life activities of the tree and easy to produce physical defoliation. Within 15-20 days after picking, individual trees that are not suitable for fertilization due to too weak tree vigor, can only be used as water, and can not exceed 2% of the amount of corrupted human waste, or used in percent. The zero urea dilution is sprayed on the opposite side of the blade in the morning or evening. In short, before the tree's vitality is restored, it is better to use no fertilizer. After the tree's vitality is restored, fertilizer must be applied to promote the root-stimulating leaves, increase the storage of the same nutrient and lay the foundation for the next year's harvest.
2, within 15-20 days after harvest, before the restoration of the tree's vital energy, do not go to chemical weeding in the orchard, especially weeding with glyphosate. Weeding is mainly due to the destruction of the green part of the weeds. After the weeds are sprayed with glyphosate, the stomata on the surface of the leaves are enlarged and the amount of water evaporation is large. In order to survive, the weeds must desperately absorb a large amount of water from the soil to replenish them, thus forming a situation in which pears compete for water. Secondly, weeds are dying after being sprayed with glyphosate for six to seven days. After the weeds die, the surface area of ​​pear orchard exposed to sunlight increases, and the surface temperature rises quickly. It is easy to burn the shallow surface of pears due to high ground temperature. Roots, thus affecting the moisture absorption of pear trees, causing physiological water loss and falling leaves. Therefore, do not remove the weeds within 15-20 days after harvesting. Weeding should also be carried out after the recovery of the pear tree's vitality, which is beneficial to the preservation of the leaf's success.
3, 15-20 days after harvest to avoid spraying high concentrations of pesticides at high temperatures at noon, so as not to burn leaves.
4. Post-harvest conditional farmers can use grass, green rice straw and other straw under the pear tree
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