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The allocated pollen tree can be selected as a pollination variety with a time difference of fragrance, Xizi green, etc., with a ratio of 4:1.
The strong seedlings are planted on the slopes and the soil is modified with sand to improve the viscous soil. Before planting, the hillsides were planted with 0.8-meter-long planting points of width, width and depth. The paddy field was dug 0.8 meters wide and 0.6 meters deep. Each mus of high-quality organic fertilizer 5000 kg or 50 kg per hole Shi Fertilizer, superphosphate 0.5 kg. High seedlings with a height of 1 m or more and a dry diameter of 1 cm or more were disinfected with 5 Baume degrees of lime sulfur. Planting in the middle and late December, with a spacing of 2 meters and a row spacing of 3 to 3.5 meters, 95 to 110 plants per mu. After the plant is irrigated, set a height of 50 cm.
Rational fertilization applies basic fertilizer in the middle and late of September, and the amount of fertilizers accounts for 70% of the total annual fertilization. The production tree applies 3 to 5 times the output of the year to apply farmhouse manure, and the young trees increase the amount of fertilizers as the tree grows. Generally put into production tree plant quality farm fertilizer 50 to 100 kg or cake fat 3 to 4 kg. Young trees in the 3 to July fraction of the time applied to the compound fertilizer 0.2 to 0.5 kilograms or human excreta 5 to 10 kilograms, ammonium bicarbonate 0.1 to 0.2 kilograms. Putting trees are generally applied 3 times a year. After mid-April, fertilizers are applied at the end of April, and 0.2-0.3 kg of compound fertilizers are applied. In late May and early June, fruit fertilizers are applied, and 0.2-0.3 kg of compound fertilizers and sulfuric acid are applied. Potassium 0.1 kg; After mid-August, post-harvest fertilizer, 0.2 to 0.3 kg of compound fertilizer applied. In combination with pest control, extra-root fertilizer was applied. In mid-July, 0.2% potassium dihydrogen phosphate was sprayed to improve pear fruit quality.
Pruning uses evacuation and layered trees to timely pull branches, control the growth of main lateral branches, and promote the formation of short fruit branches. (1) Sapling trunks, main branches and extension branches of lateral branches should be 30 to 40 cm long, short cut, lightly cut or long-stemmed vegetative branches. Saplings are carried out from June to September each year to promote the formation of short fruiting branches in the second year. (2) In addition to the backbone branches and extension branches, the branches of the tree were lightly cut, and the back branches opened up the angle, leaving more branches. Pay attention to the summer cut and promote the formation of flower buds. Pulling branch open angle, the main branch base angle is 35 degrees, the lateral branch and the main branch of the horizontal angle of 45 degrees.
Thinning and thinning fruit (1) Winter sparse buds. When pruning in winter, leave one fruit in an inflorescence, and remove too many flower buds from the result branch group and long and short fruit branch groups. (2) Spring sparse flower. 3 days before the full bloom, the flowers were removed and the center spent 2 or 3 flowers. After the inflorescences are extended, the subflora is removed in time to retain the normal flowers. (3) Summer Shuguo. After the third physiological fruit drop, the fruit is thinned. Generally, one fruit is kept in each inflorescence, leaving a single fruit at intervals of 20 to 25 centimeters to ensure a leaf to fruit ratio of 40:1.
Timely bag selection 150195 mm double shading bag is the best, usually in the physiological end of fruit drop, after the set fruit bagging. The fungicide must be sprayed before bagging. Before harvesting, it is not necessary to remove the bag and harvest it together with the fruit.
The main pest control diseases are black spot disease, rust, ring rot disease, brown spot disease; the main pests are pear bifurcation, pear stem bee, pear borer, pear wood worm, fruit sucking tobacco moth, beetles, etc., should pay attention to prevention and treatment .
Cuiguan is a new pear tree planted by the Horticultural Institute of Zhejiang Academy of Agricultural Sciences and the Hangzhou Institute of Fruit Research. The cultivar matured in late July and has a large fruit shape with an average fruit weight of 260 grams. It has a small fruit, high quality, and high yield. It is an excellent early-maturing pear variety.