绵阳经济技术高等专科学校为探索“柚矮化密植早结丰产栽培技术”，从1984年开始对抽适宜的矮化砧木进行筛选，经过13年的研究，选出了适宜的矮化砧木枳和宜昌枳，1991年四川省教委对砧木研究课题进行验收及成果鉴定，并获绵阳市科技进步一等奖。为完善拍的矮化密植栽培模式， Mianyang College of Economics and Technology In order to explore the “pomelo dwarf planting early planting high yielding cultivation techniques”, starting from 1984 on the appropriate selection of dwarfing rootstock screening, after 13 years of research, selected dwarfing rootstock trifoliate orange and Yichang trifoliate orange, Sichuan Provincial Board of Education in 1991 on the rootstocks acceptance inspection and identification of achievements, and Mianyang City won the first prize of scientific and technological progress. In order to improve the filming dwarf planting mode,