利用苹果树的营养杂交优势,进行高接换种,使优良品种苹果提早结果,早期丰产,为迅速增加这些优良品种苹果的产量开辟了新的途径。据太阳公社调查,1972年高接枝总产量约60万斤,增产约5％。 Taking advantage of nutrition hybridization of apple tree, high-exchange variety is adopted, early yield and high-yielding early-stage apple varieties are opened up, which opens up a new way to rapidly increase the yield of these excellent varieties of apples. According to the investigation of the Sun Commune, in 1972 the total output of high grafting was about 600,000 kg, an increase of about 5%.