柑桔优良品种区域化试验,系国家科学技术10年规划的项目。我站于1972年参加中国柑桔研究所本项试验,引入了温州蜜柑12个品系400余株,进行定植观察,1975年开始留果,1976年因冻害未留果,今年继续结果。现存活253株。汉中地区为我国目前柑桔栽培的北限地带,在地理环境的影响下,气候具有由暖温带向亚热带的过渡性质,年平均 Citrus regionalization of fine varieties of tests, the National Science and Technology 10-year planning project. I stood in this experiment in China Citrus Research Institute in 1972, introduced more than 400 strains of 12 lines of Satsuma mantis for colonization observation, and began to retain fruits in 1975. 253 existing live. The Hanzhong area is the northern limit zone of citrus cultivation in our country. Under the influence of the geographical environment, the climate has the transitional nature from warm temperate zone to subtropical zone. The annual average