Apple flower and fruit thinning is a key technical link to achieve high quality and high yield. Scientific and reasonable loading can significantly improve the commodity rate of fruits, reduce the size of annual fruits, and ensure the healthy growth of trees.
The role of fruit thinning
1. Improve the quality and yield of fruits. Thinning too many young fruits can save and concentrate nutrients, thereby improving the color, fruit size, sugar content, etc. of the fruit left, especially for increasing the number of fruits.
2. Promote flower bud differentiation and improve the quantity and quality of flower buds. The formation of flower buds must be completed with a certain amount of nutrient accumulation. Removing the overloaded fruit reduces a large amount of nutrient consumption, allowing the accumulated nutrients to lay the material basis for the formation of sufficiently full flower buds.
3. Promote the strength of the tree and prolong the economic life of the tree. By thinning the fruit to enhance the tree's strength, it can also prevent frost damage and frost.
Reasonable amount of fruit retained
To determine the reasonable amount of fruit left by apple trees, it is necessary to consider comprehensively according to the variety, tree age, tree potential, cultivation and management technology level, as well as the yield and quality over the years.
1. Determine the amount of fruit left according to the yield. In order to ensure the requirements of producing high-quality fruits, the yield per mu of 2000~2500 kg is more suitable under the general management level.
2. Leave the fruit according to the distance between the fruits. According to the distance of fruit retention is a simple and easy method commonly used in the current production, medium and small fruits (Gala, Red Star), the fruit spacing is kept at 15~20 cm, and the fruit spacing of large fruits (Red Fuji) is kept at 20~25 cm.
3. Determine the amount of fruit left according to the thickness of the trunk. The length of the stem circumference (cm) of the trunk (20 cm above the ground) was measured, and the amount of fruit left per plant = 0.25 × dry week was calculated according to the formula. In foreign countries, the amount of fruit left per tree = TCR×5 is determined according to the cross-sectional area (TCR) of the trunk. In addition, there are also fruit retention methods according to the branch-fruit ratio and the leaf-fruit ratio.
4. According to the orchard management level, tree age and branch potential, the fruit retention index should be appropriately adjusted. The management level is high, the age of the tree is small, and the tree is strong, so it can be appropriately retained. Old and weak trees should be based on the premise of improving the growth of the tree, and leave as little or no fruit as possible.
Apple Shuding Fruit May is introduced here, I hope it will be helpful to everyone. If you want to buy high-quality and high-yield apples, you can download the Seed Bank App, and the country's excellent apple varieties are available for everyone to choose from.
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