First, fertilizer and water management
1. Add organic fertilizer. Increasing organic fertilizer can increase the content of organic matter in soil, promote the orderly flowering of pear trees, and reduce the occurrence of falling fruit and fruit in the later period. The fertilizing amount should be flexibly controlled according to the fertility, age, variety, and yield of the pear orchard soil. Generally, a pear garden with a yield of 3000-3500 kilograms per mu is used. Each plant grows 30-50 kilograms of rotten organic fertilizer in early spring, and a tree with a root rot can be added. Fertilizer, 10-15 kilograms per mu, watered immediately after fertilization. Note that early spring fertilization is different from autumn fertilization. The fertilization location should not be within 1 meter of the trunk, should be 1-1.5 meters from the trunk, and the depth of fertilization should not be too deep, 10-20 cm.
2. Top dressing. The sprouting, flowering, and shoot growth of pear trees in spring need to consume a large amount of nutrients. Therefore, in early and late March, fertilizer should be applied before the flowers are used to meet the tree's demand for nutrients to improve the quality of flower buds and fruit set rate. During this period, topdressing nitrogen fertilizer is mainly used. In the fruit stage, urea is 0.3-1.5 kg, and the amount of fertilizer should be 10%-15% of the whole year. After flowering, the second fertilizer is applied to the expansion of young fruit. The main fertilizer is urea, and appropriate phosphorus and potassium fertilizers are used to meet the needs of young fruit expansion and new shoot growth.
3. Leaf spray fertilizer. After germinating in early April, foliar spray of 0.2%-0.3% potassium dihydrogen phosphate solution or urea solution was sprayed for 7-10 days alternately for 2-3 times. Magnesium, iron, zinc, boron and other trace elements.
Second, before the flower cut
Pre-flower shearing can adjust and overcome the phenomenon of pear-tree size. When cutting flowers before flowering, flower branches should be kept as far as possible. If the confirmation is not a flower branch, it can be appropriately retracted and eliminated according to actual needs. In addition to removing some of the old and weak flower branches, in addition to removing some of the old and weak flower branches, the large year-old trees with a large number of flower buds should also be removed from the branches that are shaded and shaded. This will increase the proportion of branches and leaves and improve the lighting conditions of the tree.
Third, flower and fruit management
1. Lei Lei, thinning flowers, thinning fruit. Thinning is not as good as sparse flowering, and sparse flowering is not as good as sparse buds. The sooner and better the sparse buds are, usually in the early stage of inflorescence separation, sparse buds. The sparse flowers mainly dredged late flowers and central flowers. The flowers of the early flowering stage are generally good flowers and should be kept in full. One inflorescence should retain 3-5 flowers. The sparse bud and sparse flower should keep 120%-130% of the load. Fruit thinning should be early, starting 7 days after flowering, and ending 30 days after flowering. The medium and growing pears should have fruit pitches of 20-25 cm, of which 2/3 of the fruit vines should remain single fruit and 1/3 fruit. Taiwan stays with double fruit, choose to stay low order, fruit shape, fruit stems thick, firm edge fruit, sparse head fruit, weak branches, small fruit, pests and fruit and malformed fruit.
2. Artificial pollination. The commonly used methods of artificial pollination include pollination method, pollination method, artificial point method, and dusting method. Pollen is collected when the buds are pollinated (preferably in the shape of a balloon) or when the petals are open. The pollen can be obtained within 3-5 days after flowering of the main cultivars, preferably within 3 days, when the temperature reaches 15°C to 20°C. good. With talcum powder, sweet potato flour as filler, point time dilution 5-10 times, when sprayed diluted 50-250 times, it is appropriate to use with the current use.
3. Orchard put bees. Put 1 box of bees per acre of pear orchard, put it in the middle of pear orchard 2-3 days before flowering. Before the flowering of the orchard pollinated with honey bees, spraying pesticides is prohibited so as not to kill the bees.
4. Spray boron during flowering. For each spray of 25% and 75%, one spray of 0.3% borax and 0.3%-0.5% urea were sprayed. Flowering requires a large amount of phosphorus and potassium. Spraying or spraying 0.3% potassium dihydrogen phosphate solution can also increase fruit setting rate.
5. Flowering frost protection. Pear trees are often attacked by cold currents or late frosts during their flowering period. After the pears are frozen, the female flowers are browned, shrunk, and flowered. Therefore, the flowering period should pay close attention to the weather forecast. When the temperature is likely to fall to -2 °C, it is necessary to prevent frost, and put sawdust, straw, firewood, and other smoking materials into the top of the pear or the surrounding important parts in advance. Place a thermometer 1 meter away from the ground at night to observe changes in temperature. When the temperature suddenly drops to 0 degrees Celsius in the early morning, smoke should be ignited. After ignition, take precautions to prevent burning of flames, try to make it emit smoke, and pay attention not to burn the branches of trees. Can also use anti-frost aerosol anti-frost, the formula is: ammonium nitrate 20% -30%, sawdust 50% -60%, waste diesel 10%, fine coal powder 10%, ammonium nitrate, sawdust, pulverized more finely Well, after being proportioned, it is loaded into a metal cylinder and lighted when used. The amount of 2-2.5 kg per mu is used.
IV. Pest Control
1. Chemical control. The first round of medicine was given. Before the budding (mid-mid-March mid-October), the pharmaceutical clearing garden was sprayed. The whole park carefully sprayed 5 Baume degrees of lime sulfur and sprayed insecticides such as chlorfluthrin 2000 times. , can play a role in the killing of a variety of wintering bacteria and the wintering of scale insect eggs, Tenebrio molitor, Cornellus mealybugs, red spiders, and early lice such as pear lice. After spraying the entire garden, brush the tree backbone 1-2 times. In the middle and early March, it is the first critical period for the prevention and control of overwintering adults and the first generation of egg hatching. It is possible to spray 1-2 times of pear orchard with heavy pears. The agent has 2.5% enemy-killed EC 3000-4000 times, 20% EC 500-1000 times or 10% imidacloprid EC 2000 times. Spraying, you can add 0.2% -0.3% detergent or 1500-2000 times liquid penetrant to improve efficacy.
Pay attention to beetles in the flowering period of pears. The prevention and treatment method is to use sub-sprinkle granules under the tree, apply 1 kg per mu, or bundle the plastic skirt under the trunk to prevent the beetle from harming the trees.
2. Scrape the bark. In the early spring, scrape the bark off the whole garden, completely scrape off the rough skin, old warpage and necrotic tissue to prevent the hidden bacteria and pest eggs in the bark joints from wintering. Do not expose the white skin when scratching and do not hurt. Phloem. For pear trees with rot disease, the bark at the lesion should be scraped and scraped to the xylem. The scraping surface must be 0.5 cm beyond the boundary between the disease and health. After scraping, apply carbendazim, lime sulfur, or 843. The bactericidal agent such as raw liquid, at the same time, scraped off the old skin and the lesions were concentrated and burned.
3. Clear Garden. In the middle and late March, the garden was completely cleared of fallen leaves, fallen fruits, stale berries, diseased branches, dead branches and weeds in the orchard, etc., and were deeply buried or burned.
We're Professional Supplier Extract Powder manufacturers and suppliers in China specialized in providing high-quality products at low price. We warmly welcome you to buy or wholesale bulk Supplier Extract Powder for sale here from our factory. For a free sample, contact us now.
Supplier Extract Powder,Supplier Extract ,Supplier Powder Manufacturer in China
Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.anabolicsteriod.com