以北京首云铁矿尾矿库采矿迹地利用覆盖客土加生态植被毯措施9年来恢复植被为研究对象,采用空间替 代时间的方法,对不同恢复年限的植被生态系统碳密度空间格局进行研究,结果表明：随着恢复年限的增加, 恢复植被地上部分碳密度呈现先降低再增加的趋势,恢复5年后植被地上部分碳密度趋于稳定;根系碳密度随 着恢复年限与地上部分碳密度呈相同的趋势;枯落物碳密度随恢复年限呈增加趋势,恢复6年后碳密度变化趋 于稳定;土壤有机碳密度随恢复年限呈现增加趋势,各层有机碳密度均显著低于周边自然植被土壤有机碳密度, 周边植被土壤有机碳密度为恢复植被土壤碳密度的2. 07 ~2. 87倍,铁矿采矿迹地恢复过程中土壤碳库具有较大 的碳汇潜能。
Adopt the method of space instead of time,we seleted the vegetation which was covered with caryi ng soil and ecologicoc vegetation campe during 9 years as rsereh oljets in Beiin Shouyum Iron Ore Mine. Spatial paltem of cahon density of vegetatin wih dfen rstoraion age was sudied The resuls show that the carbon density of boh aboveground and root decrased firsly and then increase with the years flwoe and it began lo slabli afer the 5th year. Liters cabhon densiy incresed floed restoraton ages .umil the 6th year it reached sabiliaion conditin. Soil organic carbhon of rstorartion vegetation system inre gral .and soil catom densit of natural veti aroumd was as2.07-2.87 times as that of each level of restoration vegelation. There is great onganic carhon sequstration plentita in soil of iron ore mine.
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