水保所知识产出(1956---)知识库

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( 6．36
Tg) ＞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 national
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 plantations contributed the most and accounted
for 75．9% of the total carbon storage． The realistic carbon sequestration potential ( CPr
) by treelayer 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 ( CPmax
) 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 CPmax of young and middleaged
plantations was estimated as 18．48 and 6．89 Tg，respectively，which accounted for 92% of the
total maximum carbon sequestration potential．