极早熟桃一般指果实成熟期在６５天以内。国内有关单位从７０年代开始进行极早熟桃育种工作，并育成一些品种，如“春蕾”“早花露”“京春”等，有些已在生产上推广。“早美”是北京市农林科学院林业果树研究所以“庆丰”ד朝霞”杂交授粉（１９８１年）后获得的，杂交... Very early peach generally refers to fruit ripening within 65 days. Relevant domestic units from the 70’s began very early peach breeding work and bred a number of varieties, such as “Spring Bud” “Flower” “Jingchun”, etc., some have been promoted in the production. “Early America” ​​is the fruit and vegetable of Beijing Academy of Agriculture and Forestry, “Qingfeng” × “Asaka” hybrid pollination (1981) obtained after the ...