闽西南光皮桦不同家系试验初报

对福建省漳平五一国有林场营建的4年生光皮桦155个家系测定林的生长性状进行了调查分析,以单株材积遗传增益在15%、树高、胸径遗传增益在5%以上作为优良家系的选择依据,从155个家系中初步筛选出32个优良家系,其平均树高6.3 m,平均胸径6.1 cm,平均材积0.0106 m3,平均冠幅为3 m,其树高、胸径、材积的遗传增益分别为11.1%、16.2%、39.7%;以形质优良,绝对生长量大为主要指标,共选出53个优良个体,其平均树高7.6 m,平均胸径8.2 cm,平均材积0.0214 m3,平均冠幅为3.7 m,其树高、胸径、材积的遗传增益分别为26.9%、22.9%、96.0%。

Preliminary Report on Different Betula luminifera Family in Southwestern Fujian

The 155 4-year-old Betula luminifera family determination forest growth traits were investigated in Zhangping Wuyi State-Owned Forest Farm,15% of the volume of genetic gain,more than 5% of height,and dbh were taken as superior family select basis,32 excellent families were initially screened out from 155 families,its average tree height was 6.3m,average dbh was 6.1cm,average wood volume was 0.0106m3,average crown width was 3m,its tree height,dbh and volume genetic gain were 11.1%,16.2%,39.7%;the excellent form quality,and greater absolute growth were the main indicators,53 best individual were selected,its average height was 7.6m with an average dbh of 8.2cm,the average wood volume was 0.0214m3 and the average crown width was 3.7m,its height,dbn,and volume genetic gain reached 26.9%,22.9%,96.0%.