How to manage navel orange trees during the flowering and fruiting period? Latest key points explained in detail
Navel orange is a fruit very rich in nutrients, and it has a relatively large planting area in China. When growing navel oranges, we need to carry out management work according to the phenological period of the navel orange. Especially during the flowering and fruiting period of navel oranges, a reasonable management method is the key to ensuring normal flowering and fruiting of navel oranges. So during the flowering and fruiting period of navel oranges, how should we manage them? Below, the editor brings you the key management points for navel orange trees during the flowering and fruiting period. Let's take a look!
I. Flowering period management
During the flowering period of navel orange trees, we should not only pay attention to thinning flowers, but also not neglect protecting flowers. These two are actually not contradictory. When thinning flowers, it is best to do it as early as possible. Because the earlier the flowers are thinned, the fewer nutrients the navel orange will consume, and the effect will be more obvious. When thinning flowers, we should pay attention to controlling the degree of flower thinning according to the tree vigor and the amount of flowers. After thinning flowers on vegetative branches and fruiting branches, we should pay attention to protecting flowers and must not thin too many, so as to avoid affecting fruiting. Then we should also pay attention to pest and disease control and fertilization management during the flowering period of navel oranges.
II. Fruiting period management
1. Fruit protection
During the fruiting period of navel oranges, fruit protection work is very important. First, we should fertilize to protect the fruit. Reasonable application of nitrogen, phosphorus and potassium fertilizers can effectively increase the fruit-setting rate of navel oranges. Therefore, during the flowering and fruiting period of navel oranges, we should pay attention to spraying an appropriate amount of foliar fertilizer. The fertilizers are mainly boric acid and potassium dihydrogen phosphate, and the number of sprays should be controlled according to the tree vigor and the amount of flowers of the navel orange tree. Then, during the flower-falling period of navel oranges, hormones can be appropriately sprayed for regulation to control fruit development, such as brassinolide and gibberellin, which can effectively achieve the purpose of protecting fruit.
Finally, we should also pay attention to controlling the contradiction between fruit and branches and shoots. During the second physiological fruit drop of navel orange trees, until the end of May, we should pay attention to controlling the application of nitrogen fertilizer. Prevent excessive nitrogen fertilizer application from causing summer shoot sprouting, thereby causing excessive nutrient consumption. Then, around June when summer shoots sprout, pay attention to removing summer shoots every 5 days or so to protect fruit. The growth of summer shoots can also be controlled by spraying solutions such as paclobutrazol.
2. Fruit thinning
Fruit thinning is the main measure to improve the quality of navel orange fruit and alleviate the alternate bearing phenomenon of navel oranges. It should generally be carried out during the second physiological fruit drop. When thinning fruit, the main targets are deformed fruit, pest- and disease-damaged fruit, and damaged fruit and other poor fruit. Control the amount of fruit thinning according to the number of leaves on the tree, and try to keep the leaf-to-fruit ratio at about 60-80:1, which can ensure good expansion of navel orange fruit, and the yield is also the highest. Usually when thinning fruit, about 1/10 of the total fruit amount can be removed. For trees with a large fruit set and densely clustered fruit, thin more appropriately; on the contrary, thin less or not at all.
The above is a brief introduction to the key management points for navel oranges during the flowering and fruiting period. That is all for today's introduction. This article is for reference only, and we hope it can help everyone!