I. Early application of basal fertilizer, increase of phosphate fertilizer, control of nitrogen fertilizer, ensure Sanshui
1. Early base fertilizer. The time of applying basal fertilization is early to fall after the fruit is harvested (from September to October), because at this time the nutrient consumption in the tree has been very large, and the root system will have the last peak of growth in the whole year. Early application of basal fertilizer in an appropriate amount can achieve tree nutrient supplementation, restoration of tree vigor, and enrichment of flower buds, which will provide the basis for the results of flowering in the coming year.
2. Increase phosphate fertilizer. When applying base fertilizer and topdressing, increasing the amount of phosphate fertilizer can significantly improve the quality of Yali pear. Generally, 0.3 kg of pure nitrogen is applied per 100 kg of fruit, and the ratio of nitrogen, phosphorus and potassium is 1:1.5:1. The underground top dressing was performed twice a year, once before germination (mid-to-late March), and once during fruit enlargement (May).
3. Control nitrogen fertilizer. Nitrogen fertilizer should be applied before wheat harvest (before June). Controlled use after June. Excessive application of nitrogen fertilizer at a later stage will result in a decrease in fruit quality and lighter flavor.
4. Ensure Sanshui. In general years, combined with fertilization, it is watered 3 times throughout the year and poured thoroughly. After harvesting wheat, as the weather continues to dry, it can be watered once more. From July to September, control watering.
Second, under the tree cover grass, increase fertilizer moisturizing
Before the rainy season, the grass under the trees can keep the soil moisture and inhibit the growth of weeds. Straw rot into the ground, can increase soil humus, improve soil structure, improve soil fertility, and promote the growth and development of pear.
Third, reasonable pruning, adjusting the tree potential and lighting
The full fruit tree is mainly to adjust the branch group, control the tree height is not more than 3.5 meters, open the level to solve the light, so that large and medium and small branch groups evenly configured. The weak branch group should be updated and rejuvenated.
Fourth, artificial pollination and fruit thinning and fruiting, strict control of fruit retention indicators
1. Artificial pollination. The pollen of Guangli Pear and Snow Pear is an excellent pollination combination of Yali Pear variety. It not only has a large amount of pollen and strong affinity, but also has a good color and good quality, which is superior to other pollination varieties. Pollen collection should be conducted 2 to 3 days before flowering of Ya pear.
The ability of fertilization within 3 days after flowering of Ya pear was strong. Artificial pollination should be carried out within 3 days of flowering. The time is good in the morning.
2. Thinning and thinning fruit. Flowering begins from the inflorescence separation stage, and fruit thinning begins two weeks after flowering, and is completed by the end of May.
Fifth, duck pear bagging
The period of bagging usually begins after the completion of fruiting on May 20 and is completed before June 10th. Spray bactericidal insecticide mixture before bagging, and spray bagging while spraying. When bagging, the bag mouth should be close to the base of the stalk, tightly tightened, but do not harm the fruit handle to prevent the fruit from falling off. Pear bags are preferably double-layered paper bags.
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