豫西黄土丘陵区洛阳市森林植被碳储量和碳密度研究

利用豫西黄土丘陵区代表区域洛阳地区2007年二类森林资源调查数据，采用政府间气候变化委员会（IPCC）推荐的方法和平均生物量法，估算该地区不同森林植被类型和乔木林不同树种、林龄、起源的碳储量和碳密度，并对其分布特征进行研究。结果表明：洛阳地区森林植被总碳储量为31．45 Tg （1 Tg＝1×1012 g），乔木林碳储量为25．06 Tg，森林植被平均碳密度为38．81 Mg／hm2（1 Mg＝1×106 g），乔木林平均碳密度为42．08 Mg／hm2，不同森林植被类型的碳储量依次为：乔木林＞四旁树＞经济林＞灌木＞竹林＞散生木＞疏林，乔木林树种中栎类的碳储量最高，落叶松的碳密度最高。森林植被碳储量、碳密度空间分布不平衡，但大致呈自东北向西南递增的趋势。乔木林碳储量以幼、中龄林为主，各龄级中成熟林的碳密度最高。洛阳地区森林植被具有较大的固碳潜力。

Carbon storage and carbon density of forest vegetation in Luoyang,Western Henan Province

The loessial hilly region of Western Henan comprises loess soils primarily covered in forest and is of great significance for environmental protection in central and western China.Forest resource inventory data ob-tained from the Luoyang area of western Henan in 2007 formed the basis of this study.An average biomass computational method recommended by the Intergovernmental Panel on Climate Change (IPCC)was used to estimate forest carbon storage and carbon density under different forest types,tree species,stand ages and for-est origins as well as the spatial distribution patterns of stored carbon in Luoyang forests.The results showed that the total forest vegetation carbon storage in the study area was 31.45 Tg (1 Tg=1×10 12 g)with an aver-age forest vegetation carbon density of 38.81 Mg/ha (1 Mg=1 ×10 6 g).In which the carbon storage of arbor forest was 25.06 Tg,accounting for 79.67% of the total forest vegetation carbon storage in study area,and the average carbon density of various tree species was 42.08 Mg/ha.The carbon storage of different forest catego-ries ranked in the order:arbor forest>four-side tree>economic forest>shrub forest>bamboo forest>scat-tered trees>open forest.Quercus forest had the highest carbon storage and Larch forest the lowest carbon den-sity among different tree species.The carbon storage and carbon density of natural forest were higher than that of plantation forests.Carbon storage in different Counties of Luoyang ranged from 0.31 to 10.34 Tg,and car-bon density ranged 18.41 to 44.47 Mg/ha.Forest carbon storage systematically increased from northeast to southwest.Hence,Songxian County had the highest carbon storage and carbon density while Yanshi County had the lowest.Research area forest mainly consisted of young-age and middle-age forests but the carbon densi-ty of mature forests was the highest among all of the age classes.The forest vegetation in the loessial hilly re-gion of Luoyang in western Henan has potential to store considerable quantities of carbon through growth of young and middle-aged forests.