参数(Parameter)是数学和物理学等学科经常出现的术语,意即于给定条件下取固定值的变量。苹果高产稳产参数是在一定条件下(气候、土壤条件、砧穗组合和栽培管理措施等)获得连年高产的生物学参考数值。苹果高产指标,在不同的国家和地区由于各自的环境条件、生产发展水平不同而有所不同。苏联的现行苹果高产指标为每公顷10—30吨。苏联专家们认为,随着集约化栽培水平的发展,获得每公顷79—100吨的产量是能 Parameter (Parameter) is a term often used in mathematics and physics disciplines, which means take a fixed value of variables under given conditions. The high and stable yield parameters of apples are biological reference values ​​for successive years of high yield under certain conditions (climate, soil conditions, scion combinations and cultivation management measures, etc.). Apple high yield indicators, in different countries and regions due to their different environmental conditions, different levels of production and development vary. The current high yield indicator of the Soviet Union is 10-30 tons per hectare. Soviet experts believe that with the development of intensive cultivation, the yield of 79-100 tons per hectare can be