3个杉木良种造林对比试验分析

The Afforestation Comparative Analysis of Three Fine Varieties of Cunninghamia lanceolata

为筛选适合生产用的杉木优良品种,2007年,福建省沙县官庄国有林场利用杉木第3代种子园种子、红心杉家系种子、杉木洋020无性系等3个杉木良种开展了造林对比试验,并对其生长量性状逐年进行调查。研究结果表明,造林7a后,3个优良品种均生长良好,试验林平均树高、胸径、单株立木材积分别为8.17m、9.7cm、0.03727 m3。其中,3代种子园良种生长最好,平均树高、平均胸径、单株材积分别为8.31m、10.7cm、0.04547m3;红心杉良种次之,平均树高、平均胸径、单株材积分别为7.46m、9.8cm、0.03465 m3;而洋020无性系略差些,平均树高、平均胸径、单株材积分别为8.87m、9.1cm、0.03436 m3。

To select fine varieties of Cunninghamia lanceolata for the production in forestry farms, the afforestation comparative test for the seeds of the third generation orchard, the seeds of red-core families and clone Yang-020 was performed in Fujian Guanzhuang National Forestry Farm in 2007. The annual growth increment was investigated. The results showed 3 fine varieties grew well after 7 years. The average tree height, DBH and standing individual volume of the trial forest were 8.17 m, 9.7 cm and 0.03727 m^3, respectively. Among of the three varieties, the seeds of third generation grew best, and its average tree height, DBH and individual volume were 8.31 m, 10.7 cm and 0.04547 m^3,respectively. The next was the red-core variety, and its average tree height, DBH and individual volume were 7.46 m,9.8 cm and 0.03465 m^3, respectively. The worst was the Yang-020, and its average tree height, DBH and individual volume were 8.87 m, 9.1 cm and 0.03436 m^3, respectively.