Winter pruning of Chinese wolfberry
After a year of growth, the Chinese wolfberry tree has many branches and a messy crown, and at the same time when new fruit branches are formed, some fruit branches have begun to grow old. Therefore, Chinese wolfberry needs to be pruned in winter, otherwise it will affect the yield and quality of the following year. By pruning, removing the old and replacing the new, selecting the old eye branches and seven inch branches with strong fruiting power, and cutting off the non-productive branches, it can lay a good foundation for the old eye branches to bear fruit and grow new fruit branches in the next year.
In order to manage conveniently, it is necessary to control the height of the tree by cutting the top. In general, the height of the tree should be controlled at 1-8 meters. There is room in the upper part of the crown to cut short long branches and retain about 20 cm stakes to facilitate branching and replenish the crown. Pruning branches with no reserved value should be cut off from the base.
In order to facilitate the soil management of the Chinese wolfberry orchard and not make the fruit on the drooping branches mildew, the branches of the crown base should be cut short at a height of 30 cm from the ground.
The thin branches inside the canopy should be removed, dense branches should be properly pruned, and good ventilation and light transmission conditions should be maintained to facilitate fruit growth and development.
Trimming is the pruning of the fruiting branches of the crown. The main purpose is to select good fruiting branches and cut off the old branches, needling branches, disease and insect branches, wind-broken branches, crossed branches, overlapping branches and dense squeezed branches. When pruning, the choice of old branches should be decided according to the number of new fruit branches. If there are many new branches, the old branches can retract to the robust branches.
Winter pruning should be light rather than heavy, do not cut too much. Because 16cm to 50cm at the top of the branch is the earliest bud hole to bear fruit in the second year, the fruiting branch is too short, which directly affects the yield of next year's spring fruit. In order not to miss the cut, it should be carefully trimmed in one direction around the crown from top to bottom.
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The disease site is mostly at the stem base of the dry and wet junction below the epidermis. At the beginning of the yellow brown spot depression, the spot expanded around the stem and gradually immersed in the stem rot and die. Once infected quickly, die in pieces. Control methods: choose sandy soil with convenient drainage, good ventilation, and increase phosphorus and potassium fertilizer. 50% carbendazim wettable powder or 65% manineb wettable powder is selected for seed dressing according to 0.2%-0.3% of seed dosage; 50% carbendazim wettable powder or 65% manineb wettable powder can also be used.
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First, thinning branches. First of all, the dead branches, disease and insect branches, injured branches, acupuncture branches and cross-cutting branches should be cut off, and then the fruit branches that are too dense should be cut. When thinning fruit branches, first remove shade branches, lower back branches, thin and weak branches; then remove upper branches and middle branches; if it is still dense, then sparse both sides of the branches, and after pruning, the distance between fruit branches is 5-6 cm, and they are all white branches with full growth and strong fruiting power. Second, deal with the growing branches. An overgrown branch growing below the backbone branch, reserved as an elongated branch of the backbone branch and properly truncated to stabilize the branch potential and extension direction; near the elongated branch.
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