不同马尾松杂种F_1代早期生长的比较

在福建省大田梅林国有林场连续4年调查火炬松×马尾松、湿地松×马尾松杂种F1代以及马尾松纯种苗木造林早期生长情况,结果表明：幼树存活率在造林4年后趋于稳定,且火炬松×马尾松杂种F1存活率高于湿地松×马尾松。火炬松×马尾松、湿地松×马尾松杂种F1代和马尾松纯种3个树种4年生以下（含4年生）幼树的平均地径（胸径）、抽梢、树高生长总体大小依次为：火炬松×马尾松〉湿地松×马尾松〉马尾松纯种,但3个树种间差异均不显著。4年生（48个月）幼树火炬松×马尾松杂种F1代和马尾松纯种平均树高差异显著;50个月生幼树火炬松×马尾松杂种F1代和马尾松纯种间、湿地松×马尾松杂种F1代与马尾松纯种间差异显著,但火炬松×马尾松与湿地松×马尾松间差异不显著。

Comparison of early growth of different masson hybrids F_1

Early growth in seedling plantations of hybrid F1 of loblolly×masson and slash pine×masson,and pure mason variety was investigated for successive 4 years in Meilin National Forest Farm,Datian County,Fujian Province.The survival of young trees tended to be stable after 4 years′ planting.Meanwhile,the survival of loblolly×masson hybrid F1 was higher than that of slash pine×masson hybrid F1.The order of growth of the average ground diameter（diameter at breast height）,tips,height of young trees below 4 years′ age in F1 of loblolly×masson and slash pine×masson,and pure mason variety was as follows： loblolly×masson slash pine×masson pure mason variety.But the differences among three tree varieties were insignificant.There was a significant difference in the average height of young trees between loblolly×masson hybrid F1 and pure mason variety at 4 years age（48 months）.Meanwhile,there was also a significant difference in young trees between loblolly×masson hybrid F1 and pure mason variety,and between slash pine×masson hybrid F1 and pure mason variety at 50 months age,but there was insignificant difference between loblolly×masson and slash pine×masson.