干旱区生态环境知识资源中心(Arid): 干旱区油蒿生物量凋落分解与土壤呼吸

Arid

	干旱区油蒿生物量凋落分解与土壤呼吸
其他题名	Litterfall and Decomposition of Biomass and Soil Respiration of Artemisia Ordosica Communities in Arid Region
	王海涛 1; 张银太 2; 何兴东 1; 高玉葆 1; 薛苹苹 1; 张宁 1
ISSN	1000-694X
出版年	2007
卷号	27 期号:3 页码:455-459
中文摘要	生物量的凋落分解与土壤呼吸影响流沙基质中CaCO_3的淋溶和淀积.为研究腾格里沙漠油蒿群落中土壤CaCO_3的形成,对油蒿当年生物量的凋落分解与土壤呼吸进行了探讨.结果表明:在腾格里沙漠,固定沙地上油蒿当年生物量[(41.511.76)g·m~(-2)]显著高于半固定沙地[(32.310.92)g·m~(-2)],固定沙地上油蒿叶量籽量和[(32.891.34)g·m~(-2)]也显著高于半固定沙地[(19.320.64)g·~(m-2)];但不同立地油蒿叶量和籽量的分解速率均大于0.6692 g·g~(-1)·a~(-1),且油蒿的凋落物需要4.48 a才能达到分解最大值.另一方面,油蒿半固定沙地、油蒿固定沙地和油蒿+冷蒿固定沙地的土壤呼吸速率均存在显著差异;统计分析表明,油蒿+冷蒿固定沙地土壤呼吸速率最低[(7.371.07)mg CO_2·m~(-2)·h~(-2)]可能与油蒿+冷蒿固定沙地土壤中较高的pH值和较低的土壤呼吸脱氢酶活性有关.可见,干旱区油蒿群落越到固定阶段,凋落量越大,释放的Ca~(2+)越多,土壤呼吸速率越低,土壤中的pH值越高,而这越有利于土壤中CaCO_3的形成.
英文摘要	Both the litterfall and decomposition of aboveground biomass and the soil respiration affect the eluviations and deposition of calcium carbonate in aeolian sand substrates.To study the formation of calcium carbonate in soil of Artemisia ordosica community in Tengger Desert,this paper focused on the litterfall and decomposition of annual biomass and the soil respiration in communities of A.ordosica.The results indicated that the annual biomass in fixed sand dune [(41.511.76)g·m~(-2)] was significantly higher than that in semi-fixed sand dune [(19.320.64)g·m~(-2)],and the annual litterfall [(32.891.34)g·m~(-2)] was also significantly higher than that in semi-fixed sandy land [(19.320.64)g·m~(-2)].The decomposition rate of the litterfall of A.ordosica all exceeded 0.6692 g·g~(-1)·a~(-1) in different sites,and those litterfall might need 4.48 years to reach the peak value of decomposition rate,theoretically.Statistical analysis suggested that there were significant differences among soil respiration rates on A.ordosica semi-fixed sand dune,A.ordosica fixed sand dune,and A.ordosica+ A.frigida fixed sand dune,and the lowest soil respiration rate in A.ordosica + A.frigida fixed sand dune [(7.371.07)mg·m~(-2)·h~(-1)] might be related to high pH value of soil solution and low activity of soil dehydrogenase.The higher fixed degree of the A.ordosica sand dune implies the more litterfall,the more released Ca2+;the lower soil respiration rate,the higher soil pH value,all of them will promote the formation of calcium carbonate in soil.
中文关键词	干旱区 ; 腾格里沙漠 ; 油蒿 ; 生物量 ; 土壤呼吸
英文关键词	CaCO_3 arid region TenggerDesert Artemisiaordosica biomass soil respiration CaCO_3
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:2812268
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221816
作者单位	1.南开大学生命科学学院, 天津 300071, 中国; 2.南开大学环境科学与工程学院, 天津 300071, 中国
推荐引用方式 GB/T 7714	王海涛,张银太,何兴东,等. 干旱区油蒿生物量凋落分解与土壤呼吸[J],2007,27(3):455-459.
APA	王海涛,张银太,何兴东,高玉葆,薛苹苹,&张宁.(2007).干旱区油蒿生物量凋落分解与土壤呼吸.,27(3),455-459.
MLA	王海涛,et al."干旱区油蒿生物量凋落分解与土壤呼吸".27.3(2007):455-459.