不同气候条件耐瘠薄杉木优株生长适应性的对比研究

在研究杉木良种子代生长适应性的基础上，对所筛选8年生杉木优良个体与气候条件相适应进行研究，结果表明：不同优良个体在高、胸径与材积生长表现不同适应性；在2011—2016年明杉6、10号高生长表现明显的生长下降趋势，生长量趋于平均值个体，其他个体能表现优良生长特性；在2015年降雨量偏大和夏季生长期日最高温度基本低于35 ℃气候异常年份，明杉4、6、9号表现良好的高生长，明杉9号高生长达3.5 m，而明杉1、12号等个体在2015年生长量低于其他年份，明杉8、9、10号有很好的胸径生长量，其他个体胸径生长则表现略低于上一年；材积生长变化与胸径、树高保持一致性，综合树高、胸径与材积生长，明杉4、6、8、9、10号个体更适宜于肥沃的土壤与光照条件相对较弱的、湿度相对大的立地条件，明杉1、2、3、5、7、11、12、13号个体表现更适宜于相对的高温、干旱与较瘠薄的立地条件。

Comparative Study on Growth Adaptability of Tolerance Barren Elites of Cunninghamia lanceolata Under Different Climate Conditions

The adaptability of barren tolerance elites of screened 8-year-old Cunninghamia lanceolata to the climatic conditions was studied based on the growth adaptability of barren tolerance elites of C.lanceolata, it indicated that the height, breast-diameter and timber-volume growth of the different elites fitted on the different growth condition. The height-growth of Minshan No.6 and No.10 were downtrend and tend to the average baby, the height-growth of another were better from 2011 to 2016. The height-growth of Minshan No.4, No.6 and No.9 were of the especial fast-growth and the height-growth of Minshan No.9 got 3.5 m, but the height-growth of Minshan No.1and No.12 were lack of another a particular year, because of more rainfall capacity and under 35 ℃ of air temperature during growing period in 2015. The breast-diameter growth of Minshan No.8, No.9 and No.10 were well and the breast-diameter growth of another elites were lack of up-year in 2015. The timber-volume growth and change were the same of the growth of height and breast-diameter, the growth of height and breast-diameter and timber-volume indicated that the growth adaptability of Minshan No.4, No.6, No.8, No.9 and No.10 will be more fitting on the growth-condition of the relatively lack light and bigger humidity and fertile soil, the growth adaptability of Minshan No.1, No.2, No.3, No.5, No.7, No.11, No.12 and No.13 will be more fitting on the growth-condition of the relatively height-temperature and drought and barren soil.