干旱区生态环境知识资源中心(Arid): 典型荒漠植物凋落物分解及养分动态研究

Arid

	典型荒漠植物凋落物分解及养分动态研究
其他题名	Study on Dynamic Status of Litter Decomposition and Nutrients of Typical Desert Plants
	赵红梅; 黄刚; 马健; 李彦; 范连连; 周丽
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2012
卷号	29 期号:4 页码:628-634
中文摘要	采用分解网袋法,对古尔班通古特沙漠南缘粗柄独尾草(Eremurus inderiensis)、尖喙牻牛儿苗(Erodiumoxyrrhynchum)和沙漠绢蒿(Seriphidium santolinum)3种荒漠植物叶、茎和根的分解、养分释放特性进行了研究。结果表明:叶片、茎、根系的质量损失过程均符合指数衰减模型。经过364 d的分解,粗柄独尾草叶、粗柄独尾草根、尖喙牻牛儿苗叶、尖喙牻牛儿苗茎、尖喙牻牛儿苗根、沙漠绢蒿茎、沙漠绢蒿根的失重率分别为41.96%、81.94%、42.18%、29.32%、47.02%、20.66%和20.71%;3种植物根、茎、叶的分解速率存在显著差异,分解速率依次为:粗柄独尾草根>叶;尖喙牻牛儿苗根>叶>茎;沙漠绢蒿根>茎。在整个分解过程中,N和P含量总的趋势表现为释放,叶、根凋落物质量损失与初始N、P含量显著负相关,非生物因素对其分解有重要影响。
英文摘要	As one of the most important ecosystem processes,litter decomposition is closely related to plant nutrients,ecosystem productivity and carbon and nutrient cycling,particularly to soil organic carbon pool-size and its stabilization.During last decades,numerous studies on litter decomposition in moist environment was conducted.However,there was few information about litter decomposition in arid area.Litter decomposition in arid area is different from that in moist environment owing to severe natural climate,such as sporadic rainfall,intense solar radiation,long-term drought and serious water loss and soil erosion.In recent studies,it was found that there is a discrepancy between simulated decomposition rates and measured ones in arid area.It is considered that ephemeral plants are important for net primary productivity in some deserts,and particularly for soil carbon input.The aims of this study are to investigate the dynamic status of litter decomposition of three typical desert species.Litter bag method was used to investigate the decomposition rate and nutrient release of roots,stems and leaves of Eremurus inderiensis,Erodium oxyrrhynchum and Seriphidium santolinum.Mass loss curves of leaves,stems and roots of these species were well described by an exponential decay model.Mass loss rates of leaves and roots of E.inderiensis,leaves,stems and roots of E.oxyrrhynchum,stems and roots of S.santolinum were 41.96%,81.94%,42.18%,29.32%,47.02%,20.66% and 20.71% respectively.During the 364-day decomposition in field,the decomposition rates were different from different species litters,and they were in an order of roots > leaves of E.inderiensis,roots > leaves > stems of E.oxyrrhynchum and roots > stems of S.santolinum.N and P release was observed throughout the decomposition process,N and P contents in litters were negatively correlated with mass loss.In addition,decomposition rate was significantly different at different decomposition stages.In conclusion,the decomposition rates of litters of desert ephemeral plants were high,and the decomposition time and litter types are the important factors of decomposition in arid area.
中文关键词	荒漠生态系统 ; 短命植物 ; 凋落物 ; 分解 ; 养分动态 ; 古尔班通古特沙漠
英文关键词	desert ecosystem ephemeral plant litter decomposition nutrient Gurbantunggut Desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:4585038
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228049
作者单位	中国科学院新疆生态与地理研究所,阜康荒漠生态站, 绿洲生态与荒漠环境国家重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	赵红梅,黄刚,马健,等. 典型荒漠植物凋落物分解及养分动态研究[J]. 中国科学院新疆生态与地理研究所,2012,29(4):628-634.
APA	赵红梅,黄刚,马健,李彦,范连连,&周丽.(2012).典型荒漠植物凋落物分解及养分动态研究.干旱区研究,29(4),628-634.
MLA	赵红梅,et al."典型荒漠植物凋落物分解及养分动态研究".干旱区研究 29.4(2012):628-634.