寒冷半干旱地区生产优质大苹果的关键技术冬季低温严寒，生长季节干旱少雨是影响优质大苹果经济栽培最主要的两个问题。要在寒冷半干旱地区栽培优质大苹果，必须采用尤寒的优良品种，应用抗寒、抗旱的综合栽培措施，以达到”两高一优”的目的。１．选用抗寒的优良品种选用... Cold and semi-arid areas of the key technologies for producing high-quality large apples Winter low temperature and cold, drought-growing season is affecting the economic cultivation of high-quality large apple two main problems. To grow high quality apples in cold and semi-arid areas, we must adopt the fine varieties that are especially cold and apply the comprehensive cultivation measures of cold resistance and drought resistance so as to achieve the purpose of “two high and one excellent”. 1. Selection of excellent varieties of cold selection ...