Management techniques of Jujube Orchard in late Autumn and early Winter (4)
Step 4: winter pruning. Jujube pruning can make the tree structure reasonable, improve the ventilation and light transmission conditions of the tree and the distribution of nutrients in the body, so as to achieve the purpose of early fruiting, high yield, stable yield and high quality. Results the initial pruning of jujube trees: this period of pruning should be based on thinning, retraction, truncation and training, and should be pruned according to the principle of "four retention and five no retention". "Siliu" means that the peripheral jujube heads should be retained, the jujube heads on the backbone branches should be retained, the jujube heads with strong, full and promising prospects should be retained, and the jujube heads with a large number of secondary branches and jujube stocks with strong fruiting ability should be retained. "Wubu" refers to no retention of drooping branches and weak branches, thin oblique branches and overlapping branches, disease and insect branches and dead branches, inappropriate and insubstantial overgrown branches, whorled branches, cross branches, parallel branches and long branches.
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"Kashgar" longan jujube
"Kashgar" long round jujube is a tree species with tall tree body and vigorous growth of young trees. generally, seedlings bear fruit after 2 years, and enter the full fruit period from 12 to 15 years. The fruit ripens late, the fruit is small and medium, the fruit surface is smooth, the flesh is green and white, the taste is sweet, the meat is thick, the sugar content is high, and the stone is small. The average weight of a single fruit is about 7 grams, up to 10 grams, and the yield of dried jujube is about 400 kilograms per mu. The edible rate is more than 90%, the sugar content of dried jujube is 67.2%, and the drying rate is 64%. The groundwater in our area is more than 1.0 meters and the soil salt content is more than 0.2%.
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Symptom characteristics and control of peach leaf shrinking disease
Peach leaf shrinkage disease is a common disease in spring, which mainly harms green peach, cherry, apricot, plum and so on. 1. Pathogen: the disease is caused by outer ascomycetes in fungi. 2. Symptoms: it mainly harms leaves, and in serious cases, it can also harm flowers, young fruits and twigs. The plants infected with the disease showed wrinkled ripples after spreading leaves in spring, the leaf tip and edge were rolled back, and the leaf surface was uneven. After that, with the growth of leaves, the leaf color gradually changed from yellowish green to purplish red, the mesophyll thickened and became brittle, and the degree of concavity and convexity increased. The leaves grow on the surface in late spring and early summer.
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