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栽植优良品种是丰产的基础。作者于1976—1980年对汉中地区1962和1965年引进的52株油橄榄实生树,通过丰产性、含油率、稳产性、抗寒性、抗病性和果实成熟整齐度的比较,用评分的方法从中选出适合汉中地区生长的优良单株——城固31号、汉中19号和城固22号。
Planting good varieties is the basis of high yield. In 1976-1980, 52 elite seedlings introduced from 1962 and 1965 in Hanzhong area were selected and compared with the results of high yield, oil content, stability, cold resistance, disease resistance and fruit ripeness. From the selection of suitable for the growth of Hanzhong fine single plant - Chenggu 31, Hanzhong 19 and Chenggu 22.