At present, the apple young fruit period is a critical period of the year's management. The management of this period directly affects the apple's output and quality. Combined with the Apple Demonstration Park in Sheshan Town, Zhaoyuan City, Shandong Province, I will talk about the management techniques of Apple's young fruit period.

1. Strictly thinning fruit. Scientific thinning is the key to increasing the number of people and preventing the size of the year. The earlier the fruit thinning time is, the more nutritious and nutritious it is. Generally, it starts from the bowing of the flower bud before the flower bud, and ends at the latest on the 20th. Fruit thinning requirement: Leave one fruit for every 25 centimeters, and leave one fruit for every 40 large leaves. Fruits on weak branches and short fruiting branches do not generally stay. Stay, the pest can not stay.

2. Rational use of medicine. Young fruit skin is susceptible to irritation and affects the fruit surface finish. However, the young fruit period is also a critical period for the prevention and treatment of diseases and insect pests throughout the year. Therefore, it must be highly regarded to minimize the number of medications and the variety of drugs used. The number of medications: after Xiehua once medicine, if there is no rain before the bagging can be sprayed again; if there is rain, regardless of the number of sprayed medicine, should be sprayed after the rain. Medication variety: The first time the medicine can be used carbendazim + polyoxin + diflubenzuron + bufalin or avermectin + calcium nitrate (new drug or new name of the drug generally high price, the new component of the drug can be small Area test). The second time if the drug is sprayed after the rain, only spray fungicide, can be sprayed carbendazim + polyoxin; if sprayed before bagging, can be sprayed carbendazim + polymycin + fast ketone.

3. Science summer cut. For trees without fruitless branches, the branchlets must be evacuated with leaves, and the new shoots without space for cutting and slicing should be removed as much as possible, and the three shoots and two shoots of the periphery must be removed. Shaft extension.

4. Fertilize and water. For trees with large amount of fruit set, apply 1.5-2.5 kg of compound fertilizer containing nitrogen, phosphorus, and potassium fertilizer (ratio of 1:0.6:1.1) and content of 45% in order to facilitate the expansion of young fruit. Radial shallow grooves are applied to prevent root damage and watering immediately after fertilization.

5. Correctly bagging. First, the best time for bagging, premature bagging fruit transpiration, reduced tension, calcium absorption is minimal, easy to calcium deficiency, causing bitter pit disease; too late bagging chlorosis is not good, poor light. The best bagging time begins 30 days after flowering and ends after 10 days. The second is to put a good bag, the outer bag outside the general gray yellow black, the inner bag is the best red wax bag, both inside and outside the wood pulp paper is best (burning gray fine broken, paper with ribs). It is not advisable to use inner plastic bags, outer paper bags, and easy peeling of peels, not to mention only plastic bags.

6. Cover the grass under the tree. This is an effective measure to increase soil organic matter, improve the surface finish of apples, reduce the evaporation of soil moisture, supply water smoothly and prevent cracks. It is also one of the main indicators of the results demonstration park. Therefore, it is required that all households must be covered with grass, with a thickness of more than 10 cm, corn stalks, peanut vines, and weeds.

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