Sichuan, a large high-quality apple seedlings apple seedlings base

Apple hi low-temperature drying of temperate fruit trees require winter cold, summer heat. Suitable temperature range is the average annual temperature 9 ~ 14 ℃, extreme winter low temperature is not lower than -12 ℃, the highest monthly average temperature in summer is not higher than 20 ℃, about ≥10 ℃ accumulated temperature 5000 ℃, the growing season (April to October ) the average temperature 12 ~ 18 ℃, 7.2 ℃ cold winter need less from 1200 to 1500 hours, in order to successfully through natural dormancy. It is generally believed that the annual average temperature in the region of 7.5 ~ 14 ℃, can be cultivated apple. Apple's long dormancy period. As winter temperatures are high, can not meet the required low temperatures of winter dormancy, the spring germination missing. The world's most cultivated apple from a regional perspective, the coldest month of winter (in the northern hemisphere in January, the Southern Hemisphere in July) the average temperature between -10 ~ 10 ℃, in order to meet Apple's low temperature requirements. Each main apple producing areas of China the average January temperature is within this limit. Growing season (April to October) the average temperature at 12 ~ 18 ℃, summer (June to August) the average temperature at 18 ~ 24 ℃, the most suitable for the growth of Apple. Autumn temperatures, daytime high nighttime low, fruit sugar at high, good color, thick peel, fruit powder and more resistant to storage. How to improve the survival rate of seedlings planted apple seedlings: Spring planting seedlings apple seedlings to look at the situation, apple seedling loss if circumstances should at indoor clean water a day and night, so that the full absorption apple seedlings after planting. Planting time is generally 5-10 days before the local early flowering apricot is appropriate, when planting should be standardized to achieve if they had to make the trip. Planting depth, usually apple seedling root collar trace level with the ground prevail. The interface should be on the windward side, to stretch roots and earth, practical, irrigation, water seepage and then seal the pit to facilitate water retention. Seedlings given dry: apple seedlings planted in a timely manner after its stem. Apple mostly dry tree with a central leadership, given the requirements of 70-80 cm dry. Under notches 20 cm plastic band full of buds to leave aside the election with the main branch.