强力树干注射机及其矫治梨树缺铁失绿技术研究成果鉴定会,于1988年3月在辽宁兴城召开,参加鉴定的有科研、教学及生产单位的同行专家,教授共13人。果树缺铁失绿是世界性的一大难题,中国农科院果树研究所和西南交通大学通力协作,研制出主 Strong trunk injection machine and its correction Li pear green iron loss of green technology research results appraisal meeting, held in Xingcheng, Liaoning in March 1988 to participate in the identification of scientific research, teaching and production units of peer experts, professors a total of 13 people. Iron deficiency and loss of green fruit trees is a major problem worldwide, the Chinese Academy of Agricultural Sciences Fruit Institute and Southwest Jiaotong University Tongli collaboration, developed by the Lord