高山松不同种源苗木在云南松生境下的生物量与生长分析  

Biomass and growth analysis of different provenances of Pinus densata seedling in P. yunnanensis habitat site

作　　者：周丽[1,2] 陈诗[2] 朱存福[2] 许玉兰[2] 李悦[3] 李伟 蔡年辉[2] 

机构地区：[1]攀枝花市国营林场总场,四川攀枝花617061 [2]西南林业大学林学院,云南昆明650224 [3]北京林业大学生物科学与技术学院,北京100083 [4]云南吉成园林科技股份有限公司,云南弥勒652300

出　　处：《广东农业科学》2017年第2期68-75,共8页Guangdong Agricultural Sciences

基　　金：国家自然科学基金(31360189;31070591)

摘　　要：以8个高山松种源4年生苗木为研究对象,测定其生物量和生长性状,并对各组分生物量的模型进行拟合,初步选出苗木质量较好的高山松优良种源和预估精度较高的生物量模型。结果表明:高山松各种源的生长性状除Ⅰ级侧根数和侧枝数的差异不显著外,其余性状均存在极显著差异;种源间各组分生物量均存在极显著差异,地上部分生物量是苗木生物量的主体部分,约占整株生物量的75.60%,地上部分生物量和整株生物量从大到小均表现为:西藏波密帕隆藏布江(PL)种源>四川宝兴(BX)种源>西藏林芝尼洋河(NY)种源>四川康定(KD)种源>西藏察隅(CY)种源>西藏雅鲁藏布江(YL)种源>四川理县(LX)种源>四川马尔康(MK)种源,各器官生物量的分配比例大小顺序则不尽相同;种源间除侧枝含水率外,其余组分的含水率均存在极显著差异;地径与各组分生物量之间的相关性均比苗高与各组分生物量之间的相关性更加密切,最优模型以地径(D)、地径—苗高(D2H)为自变量的幂函数生物量模型。综合比较发现,西藏波密帕隆藏布江(PL)种源的苗木质量较好,积累的干物质较多,能更好地适应试验地环境,有较大的碳储量和碳汇能力。The superior provenance of four-year-old Piuus densata was selected by the determination of biomass and growth characteristics at seedling stage. Different biomass models for components were constructed and then the optimum estimating models were selected based on the fitting analysis. The results showed that there were extremely significant difference among different provenances of P. densata for all growth and biomass characteristics except the primal7 lateral root number and lateral branch number. Aboveground biomass was the main part of the seedling biomass, accounting for about 75.60%, and aboveground biomass and total biomass was in the order：provenance Palung Zangbo 〉 Baoxing 〉 Niyang valley 〉 Kangding 〉 Chayu 〉 Yarlung Zangbo 〉 Lixian 〉 Maerkang. There were different biomass distributions in various organs. The moisture content of all components were extremely significanly different among provenances of P. densata except the moisture content of branch. The correlation was more close between the ground line diameter and all components biomasses than the correlation with seedling height＇ s. The optimal model was the power function biomass model, in which the independent variables were the ground line diameter （ D ） , the ground line diameter and seedling height （ D2H ） of all components biomass. Comprehensive comparison showed that Palung Zangbo provenance had higher seedling quality than others, which accumulated more dry matter to adapt to the environment of testing location, and had the great ability in carbon storage and carbon sequestration capacity.

关 键 词：生物量 生长性状 模型 高山松 天然杂交种 杂种优势 含水率 

分 类 号：S757.7[农业科学—森林经理学]