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本研究在湖南省野外样地调查的基础上,结合湖南省2014年森林资源二类调查结果,计算出湖南省森林生态系统碳储量的空间分布格局。结果表明:湖南省森林生态系统的平均碳密度为130.69 t·hm~(-2)。其中,乔木层、灌木层、草本层、凋落物层和土壤的碳密度分别为28.36、1.77、0.90、1.36和98.30 t·hm~(-2)。植被碳密度与土壤碳密度呈显著正相关关系。土壤碳密度与凋落物层碳密度呈显著正相关关系。阔叶林碳密度最大(175.26t·hm~(-2)),其后依次为杉木林(136.81 t·hm~(-2))、马尾松林(133.84 t·hm~(-2))、柏木林(124.88t·hm~(-2))、竹林(117.29 t·hm~(-2))、杨树林(95.08 t·hm~(-2))、经济林(80.94 t·hm~(-2))、湿地松林(64.71 t·hm~(-2))、灌木林(63.73 t·hm~(-2))。湖南省森林生态系统总碳储量为1572.02Tg C,其中,乔木层、灌木层、草本层、凋落物层和土壤的碳储量分别为341.18、21.29、10.78、16.36、1182.38 Tg C。阔叶林碳储量最大(545.77 Tg C),依次为杉木林(419.91 Tg C)、马尾松林(275.58 Tg C),竹林(127.76 Tg C)、灌木林(74.44 Tg C)、经济林(71.25 Tg C)、柏木林(25.81 Tg C)、湿地松林(22.39 Tg C)、杨树林(9.11 Tg C)。在各市州中,怀化市森林生态系统碳储量最大,为267.43 Tg C;湘潭市最少,为28.12 Tg C。湖南省森林生态系统碳储量分布不均,表现为湘西南>湘南>湘北>湘中。阔叶林、杉木林和马尾松林是湖南省森林生态系统碳储量的主要贡献者,分别占34.72%、26.71%、17.53%。
Based on the field survey in Hunan Province and the second type of forest resources in Hunan Province in 2014, this study calculated the spatial distribution of carbon storage in forest ecosystems of Hunan Province. The results showed that the average carbon density of forest ecosystems in Hunan Province was 130.69 t · hm -2. Among them, the carbon density of arbor, shrub layer, herb layer, litter layer and soil were 28.36, 1.77, 0.90, 1.36 and 98.30 t · hm -2, respectively. Vegetation carbon density and soil carbon density showed a significant positive correlation. Soil carbon density and litter layer carbon density showed a significant positive correlation. The carbon density of broad-leaved forest was the highest (175.26 t · hm -2), followed by Chinese fir plantation (136.81 t · hm -2) and Masson pine plantation (133.84 t · hm -2) (124.88 t · hm -2), bamboo forest (117.29 t · hm -2), poplar forest (95.08 t · hm -2) and economic forest (80.94 t · hm -2) ), Pinus elliottii (64.71 t · hm -2) and shrub (63.73 t · hm -2). The total carbon storage of forest ecosystems in Hunan Province was 1572.02Tg C, of which, the carbon stocks of tree layer, shrub layer, herb layer, litter layer and soil were 341.18, 21.29, 10.78, 16.36 and 1182.38 Tg C, respectively. The carbon storage of broad-leaved forest was the highest (545.77 Tg C), followed by Chinese fir (419.91 Tg C), masson pine (275.58 Tg C), bamboo (127.76 Tg C), shrub (74.44 Tg C) ), Cypress forest (25.81 Tg C), Pinus elliottii forest (22.39 Tg C), Poplar forest (9.11 Tg C). Among the cities and prefectures, Huaihua City, the largest forest ecosystem carbon storage, 267.43 Tg C; Xiangtan City, at least, 28.12 Tg C. The distribution of carbon storage in forest ecosystems of Hunan Province is uneven, showing southwest Hunan> Southern Hunan> Northern Hunan> Hunan. The broadleaved forest, Chinese fir plantation and Pinus massoniana plantation are the major contributors to the carbon storage of forest ecosystems in Hunan Province, accounting for 34.72%, 26.71% and 17.53% respectively.