杉木地理种源寒害研究

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.

A study on cold injury of geographic provenance in Chinese fir

A study on cold injury of geographic provenance in Chinese fir/Li Xiao-chu* et al//Journal of Jiangsu Forestry Science & Technology. 1990, 17 (3) .-10-20,32 The introduction experimental results show that the cold injury in provenance of Chinese fir mainly appcars in its seedling stage and 1-2 years old plantation in the north margin of the natural distribution of Chinese fir in hilly mountains of south Jiangsu and plain of north Jiangsu. The cold injury in 3 years old plantation becomes weaker. The cold-resistartce ability and its occurrcnce of proven-anco are mainly controlsd by the eco-genetic factor, show the nagative success with the latitude in seedling stage, but in young forest stage, are mainly affected by the origins' temperature, irregular climate, suddenly cooling, and culture con-ditions. Paying attention to the seedling stage and new plantation,protecting from cold injury when abnormal cooling occures, and selecting the wind proof and warm site, Chinese fir can grow well. *Authors' address; Forestry research institate of Jiangsu province, Dongshan-qiao, Zhonghuamenwei, Nanjing 211153, PRC