Apple’s requirement to climate conditions

Apple is like low-temperature drying temperature of temperate fruit trees require winter cold, summer heat. Suitable temperature range is the average temperature 9 ~ 14 ℃, extreme cold winter not less than -12 ℃, the highest monthly average temperature in summer is not higher than 20 ℃, ≥ 10 ℃ accumulated temperature of 5000 ℃ or so years, the growing season (April to October ) average temperature of 12 ~ 18 ℃, 7.2 ℃ in winter to be low temperature below 1200 ~ 1500 hours, in order to smoothly through natural dormancy. Generally believed that the annual average temperature 7.5 ~ 14 ℃ of the region, can be cultivated apples. Apple dormancy period is longer. If winter temperatures are high, can not meet the required low temperatures in winter dormancy, spring germination missing. Apple from the world’s most cultivated regions of view, the coldest month in winter (northern hemisphere in January, Southern Hemisphere in July) the average temperature between -10 ~ 10 ℃, low temperature in order to meet Apple’s requirements. Apple’s major producing areas of China in January the average temperature in this limit. Growing season (April to October) average temperature in the 12 ~ 18 ℃, summer (June to August) average temperature in the 18 ~ 24 ℃, the most suitable for the growth of apples. Summer temperature is too high, the average temperature at 26 ℃ or more, bud bad apples. Calorie deficiency, bud not good, if small, acid, color difference, intolerance storage. Autumn temperatures during the day and night, high low, high sugary fruits, color is good, thick peel, fruit powder and more resistant to storage.
Apple in the growing season precipitation precipitation per acre to be about 180 mm. A natural precipitation, the actual use of the fruit trees can absorb about 1 / 3, so the growing season precipitation to 540 mm, is sufficient to use. In the April to September rainfall of 450 mm below the irrigation area is required, the uneven distribution of precipitation in northern China, 70 to 80 percent in July to August and spring is water shortage. In the inland areas with little rainfall, water shortage, and therefore choose to build gardens, must take into account the irrigation and soil moisture measures, but also pay attention to the rainy season drainage measures.
Apple trees sunshine is like light, light enough, before they can grow normally. According to the determination of Shandong Agricultural University, Taian Golden Delicious, the new star, light compensation point of 600 to 800 meters candlelight, the saturation point in 3500 ~ 4500 m candlelight. In this context, increased light intensity, photosynthesis is also strengthened. Sunlight, is caused by a series of reactions, such as leaves leggy, weak, weak anti-pest, a small flower bud, less nutrient storage, low fruit flowering, root growth is also affected, low-sugar fruits, color is also not good.
The growth of Gala Apple soil soil, yield and quality is good or bad influence. The main factor is the soil, soil aeration, soil. In short, Apple needs deep soil, good drainage, rich in organic matter, slightly acidic to slightly alkaline.
Wind winds often bring to Apple’s growth and development of many adverse effects, such as the deflection caused by the crown, affecting flowering, pollination, leaf organ damage and fruit drop, etc., so the establishment of apple orchards in windy areas, you must create a leaked forest.