Mei Li, Zhang Zhuo-Wen, Gu Jia-Cun, Quan Xian-Kui, Yang Li-Jun, Huang Dong
College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan, China.
Ying Yong Sheng Tai Xue Bao. 2009 Aug;20(8):1791-6.
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 x m(-2) and 9295.95 g x 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 x m(-2) x 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.
通过木材分析和连续土壤芯样的方法，估算了20年生水曲柳和兴安落叶松人工林各树层的生物量和生产力，以及林分地上和地下器官的碳（C）和氮（N）储量。水曲柳和兴安落叶松的生物量分别为6815.10 g·m⁻²和9295.95 g·m⁻²，其中，树干分别占57.32%和58.01%，细根分别占2.67%和1.80%。水曲柳和兴安落叶松的年生产力分别为1618.16和2102.45 g·m⁻²·a⁻¹，其中，树干分别占39.34%和46.70%，细根分别占12.06%和5.25%。水曲柳器官中的C含量低于兴安落叶松，而N含量则相反。水曲柳的C储量低于兴安落叶松，而两种树种之间的N储量没有显著差异。水曲柳地上器官的生物量、生产力以及C和N储量均低于兴安落叶松，表明兴安落叶松地上部分的构建效率更高。由于树种之间以及同一树种不同器官之间C和N含量存在显著差异，因此应针对不同树种和不同器官进行测定，以准确估算森林的C和N储量。
