Postharvest management of Li Guo
Agricultural experts warned that after plum harvest, more attention should be paid to the management of fruit trees in order to restore the vitality of fruit trees and prepare for increasing production in the coming year. 1. Fertilize in time to restore the tree potential. The function is to restore the tree potential, enhance the leaf function, and avoid the decline of tree potential caused by abnormal defoliation after fruit picking. Fruit-picking fertilizer was applied before and after fruit-picking in early July, which coincided with the beginning of flower bud morphological differentiation. For plum trees with more fruit, 0.5 kg compound fertilizer was applied 10-15 days before harvest. Plum trees with few fruits can be delayed to be applied within one week after harvest. For orchards that have not applied fruit-picking fertilizer before harvest, about 0.5 kg of compound fertilizer should be applied within one week after harvest, and it should be applied in the crown drip line to restore the tree potential and create conditions for increasing production in the following year. 2. Ploughing and weeding, loosening and cultivating soil. Artificial weeding is better, chemical weeding should avoid the use of internal absorption and transmission herbicides such as glyphosate. Generally, weeding is carried out by ploughing and weeding once after harvest, and grass is retained between rows. Combine with ploughing and weeding to loosen the soil once, the depth is 4 Mel 5 cm, and the soil cultivation is 5 mi 7 cm. 3. Do a good job of drainage and irrigation. Plum tree is a kind of shallow-rooted fruit tree. Not only afraid of stagnant water, but also afraid of drought, sensitive to water. From July to September, it is often high temperature, drought or typhoon rainstorm. Therefore, in the rainy season, attention should be paid to ditching and drainage, and high temperature and drought should be covered in time to prevent drought or irrigation. 4. Do a good job of disease and pest control. First of all, it is necessary to do a good job in postharvest pruning and garden cleaning, cutting off branches of diseases and insect pests, over-dense branches and cutting long branches. Pay attention to the control of three generations of mulberry scale in the middle and late July. You can choose 40% Lesbon EC or 40% speed killing EC 800-10000 times liquid spray.
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Management technology of plum tree flower and fruit
Plum tree has a large number of flowers, but the self-flowering seed-setting rate is low. In order to achieve stable and high yield, flower and fruit management is an important part of plum tree, which is mainly reflected in pollination, flower and fruit thinning, flower and fruit protection and so on. First, the most suitable time for pollination is in the early stage of flowering. Pollination should be carried out by flowers within 3 days.
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Strengthen the management of plum trees in early summer to ensure high quality and high yield of plums
Although plum is a kind of fruit tree with high yield and strong disease resistance, due to poor management in early summer, the phenomenon of big and small years is serious, the fruit is small, and the quality can not be guaranteed. The plum trees in the full fruit stage are mainly short fruit branches and flower-shaped fruit branches. at present, the plum fruit is in the fruit expansion stage, in order to increase the fruit and ensure the uniform size of the fruit.
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