河南引种栽培的两批火炬松种源中龄林树高、胸径、材积、干形等特征存在着显著的差异。一般火炬松种源生长量性状早期预测效果很差 ;耐寒火炬松种源生长量早期选择有一定的效果 ,但其遗传决定系数仅为0 .5 0左右。一般火炬松种源原产地纬度对生长量影响较大 ,且与胸径呈显著负相关 ,反映出来自美国南部的种源在引种地生长较快。耐寒种源中 ,纬度与生长量呈正相关 ,经度与生长量呈负相关 ,反映出美国东部高纬度低经度局部地区的耐寒种源在豫南引种地生长较快 There were significant differences in the characteristics of tree height, diameter at breast height, volume and dry shape of the two progenies of Pinus taeda in Henan introduced and cultivated. The early prediction of growth traits of seedlings of Pinus taeda in general is poor. Early selection of cold tolerant Pinus densiflora seed sources has some effects, but its genetic predisposition coefficient is only about 0.5. General loophos provenance origin of latitude on the growth of greater impact, and was significantly negative correlation with DBH, reflecting the source from the southern United States to grow faster in the introduction of. Cold-resistant provenance, latitude and growth were positively correlated, longitude and growth were negatively correlated, reflecting the cold weather in the high latitudes and longitudes in the eastern part of the United States in the southern part of the introduction of relatively fast growth