红松不同种源与家系苗期生理特性研究

Study on Physiological Characteristics of Korean Pine with Different Provenances and Families at the Seedling Stage

通过对铁力市、带岭林业局、五营林业局和汤旺河林业局4个不同种源群组的39株红松家系3年子代苗期的生理生长特性显示,4个种源区家系3年苗木的苗木质量指数(QI)分别为铁力0.45,带岭0.4,五营0.43,汤旺河0.49,各群组间苗期生理特性差异较小。其中表现最为优良单株为铁力9号优树,全株生物量为5.12g,二级根当年萌发数为140。表现最差为带岭26号优树,全株生物量为2.57,二级根当年萌发数为65。组内差异较大。另外,五营种源区各家系间分化程度较小,其峰值基本处于中心水平区间。而其它3个种源区家系间峰度偏移,组内分化相对明显。在对各家系地上部和地下部的分析证明,红松家系幼苗在出苗初期就已经出现一定差异,而种间竞争和根系的生长发育则起到了重要作用。

The characteristics of physical growth of 39 strains of 3-year-old offspring seedlings at korean pine family from four different provenances in Tieli,Dailing,Tangwanghe and Wuying forestry districts were investigated. The results showed that the differences of physiological characteristics in the group seedling period were smaller,but the differences within groups were larger. The seedling quality index（ QI） were： Tieli 0. 45,Dailing 0. 4,Wuying 0. 43,and Tangwanghe 0. 49. The most superior individual was the ninth superior tree in Tieli,whose whole plant biomass was 5. 12 g,and the number of secondary roots germinated was 140. The Dailing 26 th superior tree was the worst,whose whole-plant biomass was 2. 57 g,and the number of secondary roots germinated was65. In addition,the provenances of Wuying district showed less differentiation between the various pedigrees,with peak value at the center of the horizontal range. While the other three provenance area families showed kurtosis offsets,and the differences within the group were more obvious. The analysis on the aboveground and underground parts indicated that families of Pinus Koraiensis seedlings had some differences in the early emergence,and interspecific competition and the growth of roots play an important role.