Apple Thinning Fruit Note
Apple thinning and fruit thinning is an important part of achieving high quality and high yield. It is a production measure to artificially adjust fruit tree growth results. Its role is to mediate the size of annual results; improve the product rate of the fruit; and ensure the health of the tree. There are two principles that must be adhered to in the process of thinning and thinning fruit:
First, resolutely overcome the concept of cherishing flowers and sparsely, and strictly follow the requirements of the indicators. Experienced persons can leave a fruit every 20-25 cm on average according to the distance method; those who are not skilled in grasping the amount of retained fruit can do it according to the yield standard per unit area, and the normal fruit orchard contains 10,000 to 12,000 fruit per mu. Decompose by branching to obtain the concept of single fruit quantity per plant.
Second, adhere to quality first, the correct arrangement of fruit placement, ensure the healthy growth of fruit. The actual operation should be grasped: keep more peripheric fruits, and less stay pods; stay in the middle and long branches, leaving fewer short branches; leaving more fruit on both sides of the twigs, leaving less on the back and back; leaving the top florets, without chewing Flowering buds; Fruits with fruiting shoots at the secondary shoots are used, no or less use of fruits with fruitless stems; fruits with many rosette leaves are not used, and fruits with less rosette leaves are not used; as far as possible, central flowers and central fruits are retained, no or less Use side lacing fruit; use large flowers, large young fruit, sparse small flowers, young fruit; use long-handled fruit, sparse short-handed fruit and fruit; use end-use fruit, sparse deformity, skewness, wounded fruit.
Note the problem:
1. Prevention of flowering frost In order to prevent the hazard of blooming frost, thinning and thinning fruit can be divided into three steps: First, the flowering sequence. After the inflorescence shows elongation, in accordance with the requirements of the fruit set, the inflorescences with inappropriate positions are removed. In order to be on the safe side, 10% to 20% can be retained as the motorized fruit; the second is fruit thinning. Basically after flowering, it can be determined that the fruit of fruiting will be retained when the fruit is set, and the retained fruit will be reduced to about 5%; After the physiological fruiting period, according to the growth and development status of young fruit, finally determine whether it is retained or not. The fruit must be selected in strict accordance with the requirements of the indicator to retain young fruit, rather to stay less, but also to be able to grow and develop into a superior fruit, "the bad tires" removed.
2. According to the market demand and the characteristics of varieties of flexible fruit retention indicator. Fruits and varieties that are popular with the market, such as Red Fuji, will not stay longer, generally leaving 10,000 to 11,000 young fruit per acre; red stars may be appropriately enlarged, leaving 12,000 to 13,000 young fruit per acre; medium and small fruit, such as Cockroaches, the average fruit volume per mu is about 12,000.
3. According to the management level of the orchard and the tree age and tree vigor, adjust the fruit set indicator. High management level, small age, strong tree potential, should stay more, otherwise stay less. In particular, the old and weak trees should be based on the premise of increasing the growth of the tree, with as little fruit as possible, and even without fruit.
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