观光木人工林生长特性及碳与营养元素研究-生态学专业论文.docxVIP

II II 灌草层为 NKCaMgP，凋落物与土壤均表现为 NCaKMgP。 （4）观光木人工林生态系统总碳储量为 159.04 t/hm2，其中乔木层、灌 草层、凋落物层及土壤层分别占 38.26%、0.01%、0.19%、61.54%，生态系 统中碳库主要是土壤层，其次是乔木层，乔木层年净固碳量为 6.32 t/ （hm2.a），年净碳素积累量为 5.01 t/（hm2.a）。 （5）观光木人工林生态系统 N、P、K 三种种营养元素总储量为 320.68 t/hm2，土壤层占了 99.71%。乔木层 5 种营养元素总储量为 1.30 t/hm2，年净 积 累 总 量 为 108.06 kg/hm2.a-1 ， 5 种 营 养 元 素 积 累 量 大 小 依 次 表 现 为 NCaKMgP。速生阶段的观光木平均每生产 1t 干物质所需的 5 种营养 元素总量为 10.66 Kg，利用效率大小依次为 PMgKCaN。 （6）乔木层 C 与 Ca 含量呈不显著的正相关；C 与 N、P、K 呈不显著 的负相关。 C 与 Mg 则 达 到 了 极 显 著 的 负 相 关 ， 可 以 用 三次多项式 Y=514.958-0.106X-3.602E-8X3 模型来模拟；土壤层中碳与 N 具有极显著的 正相关，可用方程 Y=-12.442+29.315X-6.543X2 来模拟，二者具有极好的耦 合性；C 与 K 为显著的负相关，与 P、代换性 Ca、代换性 Mg 呈不显著的 正相关。 关键词：观光木 生长特性 碳储量 植物营养 计量学特征 RESEARCH THE GROWTH CHARACTERISTICS AND III III CARBON AND NUTRIENT ELEMENTS OF TSOONGIODENDRON ODORUM PLANTATION ABSTRACT With 12 years old of Tsoongiodendron odorum plantation ecosystem as the research object, adopting average wood as the method of studing Tsoongiodendron odorum biomass, and estimated their productivity; the diameter at breast height, tree height and volume growth law and mathematical model was analyed by stem analysis method; and analyses the measuring carbon and nutrient content, storage and distribution pattern of Tsoongiodendron odorum plantation ecosystem; at last discussing the metrology characteristics of carbon and N, P, K, Ca, Mg elements of tree layer and soil layer. The results show that: the total amount of biomass of Tsoongiodendron odorum plantation ecosystem is 122.49t/hm2, and the arbor layer biomass is 121.68 t/hm2, understory shrub grass layer and litter layer was only 0.03, 0.78t/hm2. The net productivity of Fast growing stage of Tsoongiodendron odorum plantation was 10.14 t/ (hm2.a). Height, DBH and volume growth of Tsoongiodendron odorum increased with age, average annual growth and the successive growth showed 7 years ago increased rapidly; DBH appeared peak within fourth years. the rapid growth period of Tsoongiodendron odorum appeared in the first 7 years