Before sprouting, fertilizer and fertilizer were mainly organic fertilizers, supplemented by chemical fertilizers, and promoted formula fertilization technology. They focused on the application of multi-element fertilizers such as fruit-specific fertilizers, trace fertilizers, and plant growth regulators on fruit trees. For the orchard without basal fertilization in the fall, it should be applied in the spring. The depth of the outer part of the canopy is 40-60 cm, and the depth of the sandy orchard is 60-80 cm. It is best to use ring fertilizer, cake fertilizer, green manure, and crop straw. Early fruiting saplings apply 2 cubic meters of organic fertilizer per acre, and fruit trees have 2 to 4 cubic meters of organic fertilizer applied per acre to reach the standard for pound fruit or pound fruit. At the same time, applying quick-acting fertilizer, formula fertilization can be applied before germination or after flowering. It should be located at an optimal position 1 meter away from the base of the trunk. The criteria for formula fertilization are as follows: Primary fruit trees: 0.5 kg of pure nitrogen, 0.5 kg of phosphorus, 0.5 kg of potassium, 0.1 kg of zinc sulfate, and 0.1 kg of ferrous sulfate per plant; Ammonium 3 kg, potassium chloride 2 kg, zinc sulfate 0.5 kg, ferrous sulfate 0.5 kg. Ground water after spreading.
Pest control 1. Artificial control. Scrape rough skin, cut skin, cut off pests and branches, remove litter, fruit drop, and weeds under the trees, and concentrate or burn them deeply. 2. Chemical control. The inflorescence separation period is the larval incubation period of P. crassifolia. At this time, the larvae are in the base of the pedicel or inside the scales. Spraying 3 Baumide Lithium Sulfur Mixture has greater lethality to the newly hatched P. philoxeroides larvae, and at the same time it can also cure melasma disease. Ring disease. When 70% of flowers are dropped, 80% carbendazim 2000 times solution + 5% avermectin 8000 times solution + chlorpyrifos 1500 times solution are sprayed to prevent and cure pear hibiscus, pear stem bee, red spider, scab, black spot disease.
Flower and fruit management 1. Sparse flowering. When the number of branches exceeds 50% of the total branches, thinning should be carried out. Generally, it is carried out before inflorescences are separated until flowering. It is better not to be late as soon as possible. When the amount of flowers is large, the buds on the entire inflorescence can be removed. 2. Pollination. Full flower spray 350 ~ 400 times liquid borax +400 times liquid urea, can improve the fruit setting rate. The bees pollinate the orchard. Put 1 box of bees per acre of pear orchard and place it in the middle of pear orchard 2 to 3 days before flowering. Before the flowering of the orchard pollinated with honey bees, spraying pesticides is prohibited so as not to kill the bees.
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