August is the second flower bud differentiation period of apple trees and the fruit expansion period of mid-late ripe varieties. This period is positive for the sky, the temperature is high, and the evaporation is large. Only the fertilizer and water are suitable to promote fruit expansion. In this period, we must do a good job in daily management to promote the normal development of the fruit and ensure high yield and quality.
Water and fertilizer should keep up
At this point, the apple fruit needs to have enough carbohydrate supply to quickly expand. During this period, Apple's need for inorganic nutrition is characterized by a large demand for potassium, calcium, magnesium and related trace elements, and a high demand intensity. Among them, potassium is essential for promoting fruit enlargement, enhancing coloration, increasing sugar content and fruit yield, preventing bitter disease, improving fruit quality and storage stability. At the same time, the fruit trees must also have a sufficient supply of magnesium, improve the photosynthetic efficiency and the metabolic function of the fruit trees, and ensure the expansion of the fruit. When the fruit is inflated, there is also a demand for water. When the drought occurs, it should be timely flooded, but it must not be flooded with large water. The flooding of large water is prone to cracking and affecting flower bud differentiation.
In addition to bag coloring
The bagged fruit of the medium-ripe variety began to go to the bag from mid-to-late August. The bag of the double bag first goes to the outer bag, and then goes to the inner bag after 3-5 days.
After the bag is removed, the fruit can be transferred and the reflective film can be treated to promote the overall coloration of the fruit. It can be used 150-300 times + 60 times spray of Wofengsu, which can enhance photosynthesis, produce more nutrients and promote fruit coloring. The fatty acids in Chinese herbal medicine can increase the surface of plants after attaching to the surface of plants. The waxy layer of the tissue has the functions of waxing and glazing, purifying the fruit surface, enhancing the smoothness of the fruit surface, and improving the anti-sunburn function of the leaves and fruits.
Science to pruning
The focus of the autumn fruit tree pruning should be placed on the work of clearing the scorpion, and the long branches of the fruit tree stalks and the strips at the kerfs can be cut off. The fruitless branches that affect the ventilation and light transmission of the tree should also be removed or retracted; in addition, the ineffective branches of the middle and lower parts of the canopy should be removed.
Spray drop
For varieties that are easy to harvest before harvesting, spraying should be carried out in September to prevent fruit drop: the choice of naphthalene acetic acid spray wet fruit handle is the main, should be carried out 1-2 times. This method can not only shake the fruit, but also promote fruit coloring.
Weeding and flood control
In autumn, there is more rain. If it rains, it should be drained immediately. The clay orchard should pay more attention to the soil to prevent the roots from being rooted. Weeding in the orchard with many weeds, it is recommended to cut it down and press it. It can also be weeded with a chemical herbicide, and it can be used for weeding with glyphosate or with no trace of help. It has good effect.
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