干旱区生态环境知识资源中心(Arid): 科尔沁沙地30种植物叶凋落物CO

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	科尔沁沙地30种植物叶凋落物CO_2释放量及释放速率的研究
其他题名	CO_2 Release of the Decomposed Leaf Litters of 30 Species in Horqin Sand Land: in Relation to Litter Properties
	孟庆涛; 李玉霖; 赵学勇; 李玉强; 赵玉萍
ISSN	1000-694X
出版年	2007
卷号	27 期号:6 页码:960-967
中文摘要	采用可以有效控制环境因子的室内土壤培养试验,初步研究了科尔沁沙地30种植物叶凋落物的CO_2释放量及释放速率.结果表明:①在28 d培养期内,不同植物叶凋落物释放的CO_2量差异很大,其中,多年生植物叶凋落物CO_2释放量平均值大于一年生植物,但二者之间的差异不显著;禾本科植物叶凋落物CO_2释放量平均值明显小于其他植物,二者之间呈显著差异.②在28 d培养期内,不同植物叶凋落物每四天CO_2释放速率差异很大.一年生与多年生植物叶凋落物28 d内每四天释放CO_2的速率无显著差异;禾本科与其他植物叶凋落物每四天释放CO_2的速率在培养的前16 d差异呈显著,而后差异消失.③植物叶凋落物的全碳含量,氮含量,C/N,灰分/N及灰分含量不同造成CO_2释放量及释放速率的差异.叶凋落物28 d释放CO_2的量与叶凋落物初始碳含量及灰分含量均无相关关系,与叶凋落物初始氮含量呈显著正相关,与叶凋落物C/N及灰分/N呈显著负相关.叶凋落物培养期内每四天释放CO_2的速率与叶凋落物初始碳含量无相关关系;叶凋落物0-20天释放CO_2的速率与叶凋落物初始氮含量呈显著正相关,与叶凋落物C/N呈显著负相关;叶凋落物9-28天CO_2释放速率与灰分/N呈显著负相关;培养后期(17-28天)的CO_2释放速率与灰分含量呈显著负相关.
英文摘要	CO_2 releases of the decomposed leaf litters of 30 species in Horqin Sand Land were measured with incubation method.The results showed that: ①The amount of CO_2 released from the decomposed leaf litters in the period of 28 day incubation was greatly different.The averaged CO_2 released amount of perennial leaf litters was greater than that of the annuals,but not significant,while the averaged CO_2 released amount of Gramineae was less than that of the other plants and significantly different.②The rate of CO_2 released every four days was significantly different.The CO_2 release rate of Gramineae leaf litters was significantly different from that of the other plants in the first 16 days,and then the significance decreased,while the CO_2 release rate of the annual leaf litters was not significantly different from that of the perennials.③The difference in C,N,C/N,Ash/N and Ash content of leaf litter was the major cause of the difference of CO_2 release amount and rate.CO_2 release amount of leaf litter was not significantly correlated to the initial carbon content and ash content of leaf litter in the 28 days,but positively correlated to the initial nitrogen content and negatively correlated to C/N and ash/N of leaf litters.CO_2 release rate of leaf litter was no correlation to the initial carbon content of leaf litters,if calculated every four days,but strongly and positively correlated to the initial content of nitrogen and strongly and negatively to C/N of leaf litters in the period of 0 to 20 days;CO_2 release rate was strongly and negatively correlated to the ash/N of leaf litters in the period of 9th to 28th day,and correlated negatively to ash content in the period from 17th to 28th.
中文关键词	科尔沁沙地 ; 叶凋落物 ; 沙漠化 ; CO_2释放
英文关键词	Horqin Sand Land leaf litter desertification CO_2 release
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3000381
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221864
作者单位	中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	孟庆涛,李玉霖,赵学勇,等. 科尔沁沙地30种植物叶凋落物CO_2释放量及释放速率的研究[J]. 中国科学院西北生态环境资源研究院,2007,27(6):960-967.
APA	孟庆涛,李玉霖,赵学勇,李玉强,&赵玉萍.(2007).科尔沁沙地30种植物叶凋落物CO_2释放量及释放速率的研究.,27(6),960-967.
MLA	孟庆涛,et al."科尔沁沙地30种植物叶凋落物CO_2释放量及释放速率的研究".27.6(2007):960-967.