杉木良种苗木生长对比分析

分析了杉木第3代和第2.5代种子园良种苗木生长,认为杉木良种苗木的生长优势主要体现在苗高和Ⅰ级侧根数上。尤溪杉木第3代种子园良种和沙县官庄杉木第2.5代种子园良种1a生裸根苗苗高分别为0.51m和0.49m,分别比人工林采集种子的苗木高27.5%和22.5%。Ⅰ级侧根数量分别为23.33条和24.67条,分别比人工林采集种子的苗木多32.86%和40.49%。而尤溪第3代良种与官庄第2.5代良种苗木间地上部分和根系生长差异均不显著。

Analysis of improved variety seedlings of Chinese Fir

The growth of seedlings from 3rd and 2.5 th generation Chinese fir seed orchard was analyzed in this paper. The improved variety of Chinese fir got significant growth advantage on seedling height and number of grade I lateral roots. The mean seedling height of the two tested varieties named "3rd generation of Youxi"and "2.5 th generation of Guanzhuang",was 0.51 m and 0.49 m respectively, being more 27.5% and 22.5% than that of the contrast. The mean number of grade I lateral roots of "3rd generation of Youxi"and "2.5 th generation of Guanzhuang"was 23.33 and 24.67 respectively, being more 32.86% and 40.49% than that of the contrast. Especially, there was no significant difference on growth above the ground and roots in between"3rd generation of Youxi"and"2.5 th generation of Guanzhuang".