金县三十里堡公社栽培苹果树约有70多年的历史。过去的苹果树一直沿用乔砧稀植方式,采用三叶海棠、山定子做砧木。栽培密度小,《亩植株数在6.6～19.5株之间(10×10米～6×6米)》结果晚,单位面积产量低,正象俗语说的那样,“桃三杏四梨五年,苹果十年还本钱。”据全社1976年最高年产计算,平均株产116.6 Golden County thirty-fort commune cultivation of apple trees about 70 years of history. In the past the apple tree has been using the method of rare planting Joe anvil, the use of trilobata begonia, mountain stator rootstocks. Planting density is small, “the number of acres of plants in 6.6 ~ 19.5 between strains (10 × 10 m ~ 6 × 6 m)” late results, low yield per unit area, as the saying goes, “Peach apricot four pears for five years , Apple repayment of ten years. ”According to the highest total annual production in 1976 calculated that the average strain 116.6