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How to plant pear tree seedlings method (pear tree cultivation and management techniques)
(1) scientific planting. Pear planting is generally in the middle of the 11th year of the year to early March of the second year. Select high-quality robust 2-year-old grafted seedlings, rootstock for Du Pear or Dou Pear. Plant spacing for 1 m × 3 m, 1 m × 3.5 m, 2.5 m × 4 m and 3 m × 4 m, north-south direction, ditch planting. Open ditch width, depth are 80 centimeters. The excavator machine was used to dig the trench in 2 times: the 1st digging depth was 30 cm, and the excavated topsoil was put on one side; the 2nd digging depth was 50 cm, and the excavated heart soil was put on the other side. The bottom of the ditch is filled with 30 cm thick corn stalks, sprinkled with 1 layer of 0.5 cm thick calcium superphosphate, backfilled with a mixture of topsoil and rotted organic fertilizer (30~50 kg/plant), filled to 30 cm from the ground surface, flooded and sunk. Put the seedlings into the planting ditch, stretch the root system, fill in the topsoil mixed evenly with well rotted organic fertilizer, fill in the soil, shake the seedling soil, and tread with the soil. The heart soil is placed in the top layer. The depth of planting is the root neck and the ground level. Fill 1 time with water after planting. Before the soil freezes, the soil is piled 30 cm high with the seedlings as the center. In the second year, in mid to late February, refurbish the tree plate, spread 1 meter wide black mulch on each side of the tree line, and compact it with the soil between the rows.

(2) Strengthen soil, fertilizer and water management. Planted 1~2 years between the rows of intercropping soybeans, peanuts. After planting in early April to August in time to plow and weed, keep the soil loose and weed-free state. The new growth period of May-June foliar spray 0.5% urea; the new growth period of late July to early August foliar spray 500 times the photosynthesis micro-fertilizer; the new growth period of slow growth in mid- to late-August using the method of strip sowing between the rows of white clover seeding. Watering using underground hose drip irrigation system, the rapid growth of the root system, that is, the new tops of the long period of stopping in late September to mid-October, the application of rotted stable fertilizer 30 ~ 50 kg / plant, fertilizer watering in a timely manner. Tree dormant period of November to February of the following year, the clearing of the garden plowing depth of 30 cm or so, at the same time, before and after the winter solstice, the whole garden irrigation. Fertilizer using drip irrigation hose fertilizer integration technology, fertilizer dissolved in water for fertilization. starting in late February, bud sprouting when the application of urea 250 ~ 400 g / plant. After 1 week after blossom fall, about the first half of April began to flower a large number of trees in pursuit of urea 150 grams / plant + potassium sulfate compound fertilizer 150 grams / plant. 5-August attention to foliar spraying urea, amino acid liquid fertilizer and bio-organic micronutrient fertilizers, late September after picking the fruit, the recovery of nitrogen fertilizer based on nitrogen, phosphorus and potassium ternary compound fertilizer 300 ~ 500 grams / plant; pay attention to increase the application of rotting stable fertilizer, and Timely use of drip irrigation system watering. 3 years and later gradually increase the amount of fertilizer and base fertilizer application.

(3) Fine flower and fruit management. Flowering began in early March, after germination, according to about 15 cm spacing to leave inflorescences, sparse excess inflorescences. Thinning the center flower during the flowering period, leaving 1~2 side flowers. For varieties with low fruiting rates or encountering low temperatures, rainy and other adverse environmental conditions, artificial pollination: bloom (50% of the flowers of a single plant open) every 5 acres of land to put 1 box of bees, according to the situation of artificial pollination methods for pollination. In the early flowering period (about 30% of the flowers of a single plant are open), the full flowering period using bee pollination at the same time, each sprayed 1 time borax 0.3% + sugar 0.5% + 0.3% urea mixture. Thinning after fruiting stabilization: thinning out disease and insect fruits, deformed fruits, back fruits, retaining the typical characteristics of this variety of lateral fruit and pendulous fruits, thinning after the retention of fruit spacing of 20 cm or so. 3 weeks after blossom fall (about 20 days after fruit thinning) to start bagging, there are physiological fruit drop phenomenon of varieties in the physiological fruit drop after bagging. Before bagging spray 1 time 70% methyl thiophanate wettable powder 1000 times +10% imidacloprid wettable powder 5000 times +500 times amino acid calcium fertilizer, the fruit spray evenly, the fruit surface of the liquid dry before bagging. For golden pear and other varieties set double bags: set small bags before spraying 10% aphidic net emulsion 1000 times + 1.8% abamectin emulsion 1000 times + 10% of the flusilazole emulsion 2000 times + laundry detergent 2000 times; set big bags before spraying 40.7% of Lesbian (chlorpyrifos) emulsion 1000 times + 5% high efficiency cypermethrin emulsion 1000 times + 6% chlorphene imidacloprid alcohol wettability Powder 1000~1500 times liquid + washing powder 2000 times liquid. Sacking the fruit into a paper bag, the fruit stalk placed in the bag at the base of the longitudinal opening, and then the bag folded horizontally, the bag side of the longitudinal wire pinched into an "n" shape clip note folded bag. Requirements for bagging fine wire can not be clamped on the fruit stalk. Pear fruit harvest before not except the bag, harvested together with the paper bag removed.