水曲柳和落叶松人工林乔木层碳、氮储量及分配  

Carbon and nitrogen storages and allocation in tree layers of Fraxinus mandshurica and Larix gmelinii plantations

作　　者：梅莉[1] 张卓文[1] 谷加存[2] 全先奎[2] 杨丽君[1] 黄冬[1] 

机构地区：[1]华中农业大学园艺林学学院,武汉430070 [2]东北林业大学林学院,哈尔滨150040

出　　处：《应用生态学报》2009年第8期1791-1796,共6页Chinese Journal of Applied Ecology

基　　金：华中农业大学科技创新基金项目(2007XCX023);华中农业大学引进人才科研启动项目(2006XRC053);国家自然科学基金重点项目(30130160)资助

摘　　要：采用树木解析和连续土芯法,估测了20年生水曲柳和落叶松人工林乔木层各部分生物量和生产量,以及两种林分各部分的碳、氮含量及储量.结果表明:水曲柳和落叶松乔木林生物量分别为6815.10和9295.95g·m-2;两树种树干生物量占总生物量的比例均最高,分别为57.32%和58.01%;细根生物量最低,分别为2.67%和1.80%.水曲柳和落叶松的年生产量分别为1618.16和2102.45g·m-2.a-1,其中树干年生产量最高,分别占总生物量的39.34%和46.70%;细根的年生产量较低,分别占总生物量的12.06%和5.25%.水曲柳各器官碳含量低于落叶松,氮含量则高于落叶松;水曲柳林碳储量低于落叶松,而两树种氮储量差别不大.水曲柳分配到地上部分的生物量、生产量以及碳、氮比例均小于落叶松,反映了落叶松在构建地上部分相对于水曲柳的高效性;由于树种之间以及同一树种不同器官之间的碳、氮含量差别显著,精确估计森林碳、氮储量时应分树种和器官进行测定.By the methods of wood analysis and sequential soil core, the biomass and productivity of the tree layers in 20-year old Fraxiuns mandshurica and Larix gmelinii plantations, as well as the carbon （C） and nitrogen （N） storages in the above- and below-ground organs of the stands, were estimated. The biomass of F. mandshurica and L. gmelinii was 6815. 10 g · m^ -2 and 9295.95 g ·m^ -2 , in which, stem occupied 57.32% and 58.01%, and fine roots occupied 2.67% and 1.80%, respectively. The annual productivity of F. mandshurica and L. gmelinii was 1618.16 and 2102. 45 g · m^-2 · a^-1, in which , stem accounted for 39.34% and 46. 70% , and fine roots accounted for 12.06% and 5.25% , respectively. The C content in the organs of F. mandshurica was lower than that of L. gmelinii, while the N content was in adverse. The C storage of F. mandshurica was lower than that of L. gmelinii, while the N storage had no significant difference between the two tree species. The biomass, productivity, and C and N storages of aboveground organs were lower for F. mandshurica than for L. gmelinii, indicating the higher construction efficiency of the aboveground part of L. gmelinii. Due to the significant differences in the C and N contents between tree species and between the organs of same tree species, the measurement should be made on different tree species and different organs to have an accurate estimation of forest C and N storages.

关 键 词：水曲柳 落叶松 生产量 碳储量 碳分配 

分 类 号：S718.5[农业科学—林学]