在杉木自然分布区北缘苏南低山丘陵和苏北平原地区的引种试验结果表明,杉木种源的寒害主要在苗期和造林初期1～2年生时发生,3年生时一般已无明显寒害.其种源的抗寒力主要受产地生态遗传因素的控制,在苗期具纬向渐变为主的地理变异趋势,幼林期受原产地温度因子、引种地异常非节律骤然降温气候及栽植环境条件的影响.引种只要选择避风、温暖的地形栽植,并注意在苗期、造林初期和异常降温天气时采取防寒措施,是可以成林成材的. In the northern part of the natural distribution of Cunninghamia Suning hilly and northern Jiangsu plain introduction test results show that the fir provenance mainly in the early seedling and afforestation 1 to 2 years of birth, 3 years of age, there is no obvious cold injury The cold hardiness of its provenance was mainly controlled by the ecological genetic factors in the producing area, with the trend of zonal gradient at the seedling stage being the main trend of geo-variability. The young forest temperature was affected by the temperature factor of origin, As long as the introduction of species selection sheltered, warm terrain planting, and pay attention to early seedling, afforestation and abnormal cooling weather to take cold measures, can become a success.