【摘要】 对林口县青山林场樟子松2年生苗木的高生长变异进行分析的结果表明,种源间种源内都存在丰富的变异,变异系数在21.1％~22.9％之间,平均值为22.3％。3个种源间苗高生长量差异达显著水平,古莲种源高生长较快,十八站种源高生长最差。各种源家系间家系内存在丰富的变异,变异系数在12.8％~30.1％之间,平均值为19.38％;不同种源生长较快的前3个家系平均值为27.9 cm,生长较慢的后3个家系平均值为19.8 cm,前者高生长比后者快41％。更多还原

【Abstract】 The variation on height grwth of Pinus sylvestris var. mongolica was analysed.The materials are two years old seedlings in Qingshan forest farm of Linkou County. The results show that there are rich variations within and between germplasm resources, which the variation parameter fluctuates from 21.1% to 22.9 % and the average level is 22.3 % . The differences of seedling height growth among three germplasm resources have reached the marked level. The height growth of Gulian germ-plasm resource is the fastest and that of Shibazhan germplasm resource is the slowest. There are abundant of variations within and between the families in every germplasm resource too. The variation parameter is from 12.8% to 30.1% and the average level is 19.38% .The average height of the three families whose growth is fastest is 27.9 cm, and that of the slowest three families is 19.8 cm.The height growth of the former is 41% faster than that of the latter.更多还原