摘要
通过野外调查测定，研究了六盘山林区天然次生林（杂灌林、山杨和辽东栎林）、农田、草地和人工林（13、18和25年生华北落叶松）植被活体生物量的C贮量。结果表明，天然次生林植被地上生物量C贮量为14．93～25．92t·hm^-2，根系为6．50～7．55t·hm^-2；人工林地上为11．97～45．39t·hm^-2，根系为6．48～7．64t·hm^-2；农田和草地地上分别为0．83和1．09t·hm^-2，根系分别为0．49和1．61t·hm^-2。植被活体生物量C年均积累量，天然次生林地上为2．97～5．15t·hm～·a～，根系为1．67～2．86t·hm^-2·a^-1：人工林地上为5．07～6．49t·hm^-2·a^-1，根系为1．90～2．10t·hm^-2·a^-1；农田与草地地上分别为0．83和1．09t·hm^-2·a^-1，根系分别为1．38和1．03t·hm^-2·a^-1。在生长季，草本地上部分C积累呈逐步增长趋势，最高峰在9-10月，10月后下降。细根生物量C的积累量，天然次生林在5、6、9月较高，草地在8月份较低，农田在7和9月较高，人工林在5、9和10月较高。
The storages of biomass carbon under cropland, rangeland, natural secondary forests（brushwood , natural secondary forest dominated by Quercus liaotungensis or Populus davidiana） and the plantation of Lar/x principis-rupprecntil（ 13,18 and 25-year-old） were investigated. It was found that the above-ground biomass carbon for natural secondary forest, plantation of larch , cropland and rangeland was 14.93～ 25.92t·hm^-2, 11 . 97～ 45.39t·hm^-2, 0.83t·hm^-2,0.49t·hm^-2, respectively. The storage of underground biomass carbon for the natural seeondary forest , the plantation of larch, cropland and rangeland was 6.50 ～7.55t·hm^-2,6.48 ～7.64t·hm^-2, 1.09t·hm^-2, 1.61t·hm^-2, respectively. The above-ground NPP carbon for the natural secondary forest, the plantation of larch, cropland and rangeland was 2.97 ～5.15t·hm^-2·a^-1,5.07～6.49t·hm^-2·a^-10.83 t·hm^-2·a^-1, 1.09t·hm^-2·a^-1 , respectively. The underground NPP carbon for the natural secondary forest, the plantation of larch, cropland and rangeland was 1.67～2.86t·hm^-2·a^-1,1.90～2.10t·hm^-2·a^-1,1.38t·hm^-2·a^-1 and 1.03 t ~ hm-2 . a , respectively. The storage of aboveground biomass carbon of grass increased gradually from May to October. The storage of fine root biomass carbon was the highest in May, June and September for natural secondary forest, which was the lowest in August for rangeland, the highest in July and September for cropland and the highest in May, September and October for the plantation.
出处
《林业科学研究》
CSCD
北大核心
2006年第3期277-283,共7页
Forest Research
基金
国家自然科学基金(40271109)项目
关键词
天然次生林
农田
草地
人工林
植被活体
C贮量
natural secondary forest
cropland
rangeland
plantation
vegetation biomass
carbon storage
