中文摘要：

为了选出云南松苗木质量较高的优良群体,对云南省7个云南松群体的4年生苗木生物量和生长性状进行了测定和分析。结果表明：云南松不同群体的生长性状除主根长外,其余性状均存在极显著差异（P〈0.01）。不同群体各器官的生物量、地上部分生物量和总生物量均存在极显著差异,总生物量、地上部分生物量和地下部分（根）生物量从大到小表现为群体BS〉GS〉KM〉LJ〉YL〉YX〉ZD,各器官生物量的分配比例从大到小表现为主干〉针叶〉根〉侧枝。群体间的根、主干和针叶的含水率均存在极显著差异,侧枝含水率差异显著（P〈0.05）。苗木生物量结构特征仅有光合器官和非光合器官比差异极显著,枝干比差异显著。综合比较后发现,保山（BS）群体和高黎贡山（GS）群体的苗木质量较好,具有较强的环境适应能力,碳储量和碳汇潜力较大。

英文摘要：

The superior population of four-year-old Pinus yunnanensis was selected by the determination of biomass and growth characteristics at seedling stage. The results indicated that all characteristics studied presented extremely significant difference among populations of P. yunnanertsis except the main root length （ P 〈 0. 01 ）. All organs＇ biomasses, aboveground biomass and total biomass studied presented extremely significantly differece. The order of the total biomasses,aboveground biomass and underground biomass （root biomass） was population BS 〉 GS 〉 KM 〉 LJ 〉 YL 〉 YX 〉 ZD,and the order of the biomass distribution in different organs was stem 〉 needle 〉 root 〉 branch among populations of P. yunnanensis. The moisture content of root, stem, needle presented extremely significant difference and the moisture content of branch presented significant difference among popula- tions of P. yunnanensis （P 〈 0.05）. Only photosynthetic and non-photosynthetic organs ratio presented extremely significant difference of the seedling biomass characteristics, and branch-stem ratio presented significant difference. Comprehensive comparison showed that Baoshan population and Gaoligong Mountain population exhibited higher seedling quality, they presented the strong ability to adaptable to the environment, and exhibited the great potential in carbon storage and carbon sequestration.