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Korla pear freezing Reclamation Preliminary Report

In mid-May, we belong to Korla Reclamation, Second Division, 28 groups,[link widoczny dla zalogowanych], 29 groups, 3O group of 12 companies of more than 3O orchard field investigation, the cause of frost damage. Proposed remedies and preventive measures one general law of the field freezing occurs 1, pear cold parts: general results of the tree trunk tough northern cold, buds freeze to death, severe thousand a week to form the main layer of pear black, tree death. Reclamation frozen to death by a tree l_5-2.0 million trees. Flower buds mature trees mainly cold, causing a cut 2O 3O2, cold and different varieties and age differences: Ren results Dangshan severe frost damage, 91 the incidence of frost damage, the mortality rate of 1.2; followed by the results of fragrant pear tough, the occurrence of rate of 89. Mortality rate 2.9; full fruit period occurred in Hong pear less. Pear and snowflake survey occurred without a freeze injury. 3, the topography and windbreaks in the cold difference: is located in the Tarim and Peacock Valley Road, the impact of the 29 groups of 14 on the plains with the surrounding open space, the main wind direction is not large orchard windbreaks, pear freezing rate 100; located in the Piedmont flood alluvial plain of the 3O product group four with garden, windbreak poor, freezing rate of 60; and the impact of the alluvial fan in the lower part of the 3O-day mission garden. Good windbreak orchard, pear trees without a frost damage occurred. 4, the cold and different site conditions: soil structure, poor, thin soil layer. Layer under compaction, tree vigor is weak, re-freezing. Second row bucket 28 Mission Park, a 3Ocm Opera O 31-40cm of soil is loam with compacted layer at the yellow tree, freezing rate of 100; 30 Mission Park III is located in sandy soil with pear, retaining water and poor soil fertility. Freezing rate 97; 3O-day Mission Park is located in sandy loam soil thick, robust growth vigor, without a freeze injury occurs. 5, the grafting site differences in the level of the cold: low then the tree re-freezing. 30 Mission Park, four with 5 farmers pear, pear trees grafted in 30era sites around the northern trunk cambium black; grafted site around the pear tree in 50cm, brown trunk cambium north; 70cm above the graft site in the pear tree, trunk north of the formation of white layer normal. 6, differences between the different culture and management of the cold: six consecutive 29 Agriculture Horticulture Mission 9 year old pear tree. Last year, 1.4 tons of yield / acre, tree vigor weak, then fall by the end of August to the beginning of pouring 1O Sanshui, delaying harvest until mid-October this year, the incidence of frost damage 100, tree mortality rate of 5o, if the park with three three 8-year-old pear tree farm last year, yields 0.4 tons, acres. Robust growth vigor, the fall was dug water. After harvest in September. Frost damage is not a place this year. Second, prevention Suggestions freezing historical data analysis. Korla region of the frost damage occurs once every decade or so, so cold and the tree in addition to remedial work to do, but also establish long-term freezing of ideology, should be arranged when in the development of pear varieties, reasonable workload, enhancing cultural management. 1, there is no frost on the tree trunk to take measures for protecting flowers and fruits foot, strengthening the artificial pollination. While blooming of spraying B 60 +15 +1625 glucose manganese sulfate + o. Prepared from the 0.3 GA 3 concentration of the solution, in order to improve fruit set. Complete destruction of the bark of the trunk caused by dead trees can survive in the roots of some stubble. Spring cultivars grafted skin on the trunk accounted for a good 1 / 2 fruit, the lower slips can be used to chop and pick hardwood. 2, a reasonable variety of arrangements: Korla fragrant pear-based regional development to local varieties of time. Pollinated varieties in the arrangement should be considered when appropriate to do with the development of part of the pear pollination varieties. 3, the choice of a good garden, and planted suitable growth: the selection of planting orchards thick permeable layer of loam and sandy loam strong to do garden. Gathered in the cold air should be the impact of the alluvial plains and river, the graft site should be raised to YOcm above, but also a corresponding increase in the high dry. 4, create a windbreak: the place with the main vertical wind, and create windbreaks. To trees, shrubs Hunzai method. Can significantly reduce the Fruit Tree. 5, strengthen the cultivation and management: deep organic fertilizer, so jin jin fruit fertilizer, improved soil sand and plastic sheet, a good foundation for fruit tree root development. The construction of a good tree lighting and community structure, flower and fruit thinning, planting a reasonable negative. To maintain robust growth vigor in autumn water control, in September should not be watered;】 O completion in early picking; and good winter irrigation water. 6, do rot disease prevention and control: cold and prone to rot the tree. On the trunk, main branch, branches and other parts of the right to timely, it was discovered after the time scaling. The specific method is: put a knife in the lesion at the rotting tissue and scraped; and the junction of disease more than healthy scratch 0.5cm. Disinfected with potassium permanganate solution, and then apply a liquid agent 843 once rehabilitation. Note: In some surveys comrades Dong sickness, ginger Yaxing, Mengbao Chuan, Deng Huijun and so on. To express my gratitude! F7-20z long staple cotton servant back to purple and its application to irrigate cultivated in vain plastic Yun Gu