How to prune apricot trees with initial fruit?
How to prune apricot trees with initial fruit? The main task of pruning apricot trees is to continue to cultivate backbone branches, cultivate good fruiting branch groups, expand the crown, promote the crown and promote early production. The growth of the first fruit tree is still very large, and three aspects of shaping, crown expansion and fruit should be taken into account when pruning. Light pruning should be mastered in pruning, and the pruning of the extended branches of the main and lateral branches should generally be cut short with a full length of 2 to 3 according to the growth trend. After the apricot tree enters the fruit, the flower bud formation is easy to slow down the developing branches with moderate growth potential and more open angle, make them germinate medium and short branches, increase the number of fruiting branches, and retract and culture into fruiting branches group in time after flowering or fruiting. The sturdy and erect branches issued by more erect varieties may also have flower buds, but the flower buds on this branch are not easy to set fruit, so we can use the method of pulling branches to ease the growth potential, promote branchlets, shape in flower buds and become fruiting branches. Apricot trees usually have good fruit on medium and short branches, but the fruiting rate of long fruit branches is not high. Long fruit branches can be truncated properly to promote branching and be cultured into fruiting branches. The angle of medium and short branches is large, the flower is easy to grow, and there is no pruning, so as to facilitate the fruit. For non-backbone branches, strong branches that are densely squeezed, crossed, overlapped and disturbed trees should be removed to facilitate ventilation and light penetration. Control the growth of competitive branches and erect long branches. The pruning of the first fruit tree should be light rather than heavy, so as to facilitate the early high yield. However, trees with weak growth can be properly re-pruned, too dense branches, thin and weak branches can be removed, strong branches can be retained, and erect strong branches can be flattened as temporary branches to promote sturdy medium and short fruit branches and restore semi-strong trees.
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What are the environmental requirements for the growth of apricot trees?
Apricot is a perennial deciduous fruit tree with natural growth of more than 10 meters. It has a long life, like light, cold, drought and barren. It has strong adaptability to the external environmental conditions, and the range of suitable cultivation is also very wide. The average annual temperature in the main producing areas is-5-22 ℃, and the annual accumulated temperature above 10 ℃ ≥ is 1000-6500.
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Multiple female flowers of litchi and longan regulate anther fertilizer
In the early stage of flower bud differentiation and development, litchi and longan differentiate and develop together in the same flower, and the sex of each flower is not determined until 20-25 days before flowering. The female-to-male ratio of flower panicle is affected by ambient temperature, nutritional status and hormone level. The author has observed for many years.
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