干旱区生态环境知识资源中心(Arid): 甘肃民勤绿洲-流沙过渡带植物群落光合和呼吸特征的比较研究

Arid

	甘肃民勤绿洲-流沙过渡带植物群落光合和呼吸特征的比较研究
其他题名	Comparison of photosynthesis and respiration of plant communities in ecotone between desert and oasis in mbvqesf, gansu
	崔骁勇 ; 刘世荣 ; 赵广东 ; 马全林
来源期刊	林业科学
ISSN	1001-7488
出版年	2003
卷号	39 期号:3 页码:6-14
中文摘要	在甘肃省民勤绿洲选择典型的绿洲农田-流沙过渡带，研究了2种主要群落类型红柳群落和白刺群落的建群物种红柳(Tamarixledeb)和白刺(Nitraiatongutorum)的净光合速率、暗呼吸速率和水分利用特征，并比较了不同部位的土壤呼吸速率。虽然2种植物单位叶片干重的净光合速率相似，但是红柳植株和以它为建群种的红柳群落比白刺植株和白刺群落具有更高的净光合速率和土壤呼吸速率，因而也具有更大的碳素地球化学循环强度。在红柳群落到白刺群落直至流沙的荒漠化演替过程中，群落及整个区域的碳素循环和养分周转发生了较大的变化，循环强度和时空变异程度呈下降趋势。
英文摘要	Ecological processes occurred in the ecotone from shifting sand desert to oasis cropland are by far important for desertification development and oasis sustainability. Carbon fixation and emission, the principal ecosystem process along a desertification gradient in the ecotone in Minqin Oasis, Gansu Province was studied. Net photosynthetic rate, leaf dark respiration rate and water use efficiency of Tamarix ledeb and Nitraria tongutorum, the dominant species in the sucessional plant communities were examined. Leaf and soil respiration were also measured in the gradient. Although the two species had similar leaf-dry-weight-based photosynthetic rate, T. ledeb plant and its dominated plant community had higher rate of photosynthesis and soil respiration, therefore, its intensity of carbon biogeochemical cycling was higher than that of N. tongutorum community. During the desertification process from T. ledeb community to N. tongutorum community and further to mobile sand, local and regional carbon cycling and nutrient turnover changed dramatically. The strength of cycling as well as temporal and spatial variation decreased.
中文关键词	荒漠化 ; 光合作用 ; 呼吸作用 ; 碳平衡 ; 植物群落 ; 过渡带
英文关键词	Desertification Photosynthesis Respiration Carbon balance Plant community Ecotone
语种	英语
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:1313957
来源机构	甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204183
作者单位	1.Institute of Ecology, Envronment and Protection, CAF, BeiJing 100091, China; 2.Gansu Desert Control and Research Institute, Wuwei, Gansu 733000, China
推荐引用方式 GB/T 7714	崔骁勇,刘世荣,赵广东,等. 甘肃民勤绿洲-流沙过渡带植物群落光合和呼吸特征的比较研究[J]. 甘肃省治沙研究所,2003,39(3):6-14.
APA	崔骁勇,刘世荣,赵广东,&马全林.(2003).甘肃民勤绿洲-流沙过渡带植物群落光合和呼吸特征的比较研究.林业科学,39(3),6-14.
MLA	崔骁勇,et al."甘肃民勤绿洲-流沙过渡带植物群落光合和呼吸特征的比较研究".林业科学 39.3(2003):6-14.