甘肃省5种典型人工林生态系统固碳现状与潜力  

Carbon storage and sequestration potential of five typical plantation ecosystems in Gansu Province,China

作　　者：程然然[1] 关晋宏[2,3] 张建国[1,4] 何秋月[3] 邓磊[3] 侯浩[3] 李国庆[1,2] 杜盛[1,2] 

机构地区：[1]中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 [2]西北农林科技大学水土保持研究所,陕西杨凌712100 [3]西北农林科技大学林学院,陕西杨凌712100 [4]黄河水利委员会黄河上中游管理局,西安710021

出　　处：《应用生态学报》2017年第4期1112-1120,共9页Chinese Journal of Applied Ecology

基　　金：中国科学院战略性先导科技专项(XDA05050202)资助~~

摘　　要：基于野外调查与室内实测数据,结合第八次全国森林资源清查资料,分析了甘肃省5种典型人工林生态系统(刺槐、杨树、油松/华山松、落叶松及云杉林)森林生态系统碳密度、碳储量,并估算了乔木层固碳潜力.结果表明:5种典型人工林生态系统平均碳密度和总碳储量分别为139.65 t·hm^(-2)和85.78 Tg,不同人工林类型之间差异较大.不同龄组间碳密度表现为近熟林(250.70 t·hm^(-2))最大,其次是成熟林(175.97 t·hm^(-2))和中龄林(156.92 t·hm^(-2)),幼龄林(117.56 t·hm^(-2))最低.碳储量表现为幼龄林(45.47 Tg)>中龄林(19.54 Tg)>成熟林(11.84 Tg)>近熟林(8.93 Tg),幼中龄林碳储量占总碳储量的75.9%.5种典型人工林乔木层现实固碳潜力合计为7.27 Tg,刺槐林(2.49 Tg)和杨树林(2.10 Tg)最大;各龄组中,幼龄林现实固碳潜力最大(3.78 Tg),其次是中龄林(2.04 Tg),近熟林最小(0.45 Tg).5种典型人工林乔木层最大固碳潜力达27.55 Tg,表现为刺槐林(9.42 Tg)>落叶松林(6.22 Tg)≈云杉林(6.36Tg)>杨树林(3.18 Tg)>油松/华山松林(2.37 Tg);其中,幼、中龄林最大固碳潜力分别为18.48和6.89 Tg,占总最大固碳潜力的92%.Based on the data of the field investigation and laboratory and the database of the 8th na- tional forestry inventory, ecosystem carbon density, storage amount, and sequestration potential of tree layer were estimated for five typical plantation ecosystems （Robinia pseudoacacia, Populus spp., Pinus tabuliformis ＆ Pinus armandii, which were grouped as one kind of ecosystems, Larix principis-rupprechtii, and Picea asperata） in Gansu Province. The results showed that the average carbon density and total carbon storage of the five typical plantation ecosystems were 139.65 t ~ hm-2 and 85.78 Tg, respectively. Ecosystem carbon density varied among ecosystems. It followed the sequence of premature （250.70 t ~ hm-2） 〉 mature （ 175.97 t ~ hm-2） 〉 middle-aged （ 156.92 t ~ hm-2） 〉 young （117.56 t - hm-2） forest. Meanwhile, carbon storage in these plantations ranked in the order of young （45.47 Tg） 〉 middle-aged （19.54 Tg） 〉 mature （ 11.84 Tg） 〉 pre-mature （ 8.93 Tg） forest. Specifically, young and middle-aged ted for 75.9% of the total carbon storage. The realistic plantations contributed the most and accoun- carbon sequestration potential （CPr） by tree layer of the five typical plantation ecosystems in Gansu Province was estimated as 7.27 Tg. The two largest contributors to CPr were R. pseudoacacia （2.49 Tg） and Populus spp. （2.10 Tg）. Young plantations （3.78 Tg） showed the largest CPr, followed by middle-aged plantations （2.04 Tg）, and the value of premature plantations （0.45 Tg） was the smallest. The maximum carbon sequestration potential （CPr^ax） might be up to 27.55 Tg, the CPmax with different plantations ranked in the order of R. pseudoacacia （9.42 Tg）〉 L. principis-rupprechtii （6.22 Tg） ≈ P. asperata （6.36 Tg） 〉 Populus spp. （3.18 Tg） 〉P. tabuliformis ＆ P. armandii （2.37 Tg）. The CPm,x of young and middleaged plantations was estimated as 18.48 and 6.89 Tg, respectively, which accounted for 92% of the total max

关 键 词：甘肃省 人工林 碳密度 碳储量 固碳潜力 

分 类 号：S718.5[农业科学—林学]