四川杉木第二代无系种子园洪雅半同胞子代测定林生长分析

Growth Analysis of Half Sib Progenies in Clonal Seed Orchard of Second Generation for Cunninghamia lanceolata in Hongya,Sichuan

摘要: 对洪雅县国有林场八面山杉木2代种子园子代测定林51个家系1个对照进行10 a生调查分析。分析结果表明51个家系间胸径、树高和材积差异明显。现实增益显著，胸径增益6.3%，树高增益3.6%，材积增益16.7%。胸径单株最大值出现在42号家系中，达到23.7 cm，树高单株最大值出现在31号家系中，达到14.8 m，通过综合分析4号、44号、10号、34号、21号、8号、11号、43号、22号、42号、28号、19号、7号和47号等家系具有较好的材积增益和遗传稳定性。

Abstract: Investigation and analysis were made of semi-sib progenies for forests of ten-year-old Chinese fir in the seed orchard of Bamianshan State-owned Forest Farm in Hongya County.Results showed that there were significant differences in breast diameter,tree height and volume between 51 families.The real gain was significant,with a DBH gain of 6.3%,a tree height gain of 3.6%,and a volume gain of 16.7%.The maximum of DBH reached 23.7 cm in No.42 family.The highest value of tree height appeared in No.31 family,reaching 14.8 m.A comprehensive analysis showed that there were good volume gain and genetic stability in No.4,No.44,No.10,No.34,No.21,No.8,No.11,No.43,No.22,No.42,No.28,No.19,No.7 and No.47.