Preliminary study on introduction of Limber pine(Pinus flexilis James)
Peng Zuo-deng · Hebei Journal of Forestry and Orchard Research · 2006
In order to master the growth situation and adaptability of limber pine in China,studies were given to its growth status after introduction taken Pinus tabulaeformis,Pinus armandi and Pinus bungeanaas as controls.The results indicated that the nursery germination rate of the germplasm source 1 and 2 were 24.25% and 25.25% respectively,lower than that of Pinus tabulaeformis(36.5%),but higher than that of Pinus bungeanaas(18.25%) and Pinus armandi(13.25%);the survival rate was lower than that of native species.The seedlings of Pinus flexilis grew relatively slow.The height of yearling of germplasm source 1 and 2 were 3.1cm and 3.2cm,lower than Pinus tabulaeformis(6.3 cm),Pinus armandi(5.2 cm) and Pinus bungeanaas(4.3 cm).Root length were 0.175 cm,0.178 cm respectively,shorter than Pinus tabulaeformis(0.208 cm),but was not significantly different with Pinus armandi(0.182 cm) and Pinus bungeanaas(0.178).The average tap root length of Pinus flexilis from germplasm source 1 and 2 were 19.1 cm and 14.8 cm,longer than that of native species.Experiments showed that germplasm source 2 was better than germplasm source 1 in growth indexes.