纳板河流域季风常绿阔叶林碳蓄积潜能初探

Carbon Sequestration Potential of Evergreen Broadleaved Forest in Naban River Watershed National Nature Reserve

2009年,在纳板河流域内设置了4个30m×50m的季风常绿阔叶林固定监测样地,按照每2年1次的频率,对各样地的相关监测指标进行测量和记录。结果显示:2009—2013年,4个样地碳储量均呈现上升趋势,2013—2015年,除样地2碳储量持续上升外,其余样地碳储量均呈现下降趋势;各个样地内树种的构成发生了变化,并且各优势种碳蓄积速率差异较大;4个样地的平均生态系统碳储量值为225.50t C/hm^2,其中乔木层、根系、灌木和草本、凋落物现存量、粗死木质残体、表层土壤所占的比例分别为50.9%、10.1%、0.1%、1.7%、3.4%和33.8%。建议:采取人工回归种植方法,不断提高森林蓄积和碳储量;加强季风常绿阔叶林非木质碳库保护;补充完善村规民约,积极推行节能减排;加强国内外科研合作,提高科研深度和广度。

Forest as a crucial carbon sink plays important role in forest ecosystem function and climate change miti-gation. The monsoon evergreen broadleaved forest, as a dominant vegetation type of Naban River Watershed Nation-al Nature Reserve, shows its significance in forest ecosystem function and services. The study adopted a long term（2009 -2015） permanent plots data, and attempted to assess carbon sequestration potential of monsoon evergreenbroadleaved forest in order to explore effective strategies for forest management and conservation. The results indica-ted that the carbon storage of the four sample sites was increasing from the year of 2009 to 2013. However, the car-bon storage in two sites was still rising, the other two sites showed a decreasing trend from 2013 -2015. The struc-tures of tree species in four sample sites have changed. Furthermore, the differences of the dominant tree species infour sample sites revealed various carbon accumulation rates. The average carbon storage of four sites was 225.50t/hm2. The carbon storages of tree layer, roots, bushes, grasses, leaves, rotten woods, and surface soil accountedfor 50. 9% , 10. 1% , 0. 1% , 1.7% , 3.4% , and 33.8% respectively. The man - made reforest could constantlyincrease the carbon storage to protect the non -wood carbon sink of evergreen broadleaved forest. The village regu-lations should be formed in order to conserve energy and reduce emission. The co -operations between countriesand within nation should be strengthened to improve the depth and width of research.