干旱区生态环境知识资源中心(Arid): 沙坡头不同微生境下油蒿和柠条叶片delta13C的季节变化及其对气候因子的响应

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	沙坡头不同微生境下油蒿和柠条叶片delta13C的季节变化及其对气候因子的响应
其他题名	Seasonal Variations of Leaf delta13C of Desert Plants and Its Response to Climatic Factor Changes in Different Micro-habitats in Shapotou Station
	赵良菊 1; 肖洪浪1 ; 刘晓宏 2; 罗芳 1; 李守中 1; 陆明峰 1
来源期刊	冰川冻土
ISSN	1000-0240
出版年	2005
卷号	27 期号:5 页码:747-754
中文摘要	通过对沙坡头人工固沙区不同微生境和种植方式下固沙植物油蒿(Artemisia ordosica)和柠条(Caragana korshinskii)叶片稳定碳同位素比率(delta13C)的测定,研究了该区油蒿和柠条叶片delta13C差异及其季节变化,并探讨了不同气候因素对植物delta13C的影响.结果表明:柠条delta13C显著高于油蒿(P＝0.003),即柠条的水分利用效率高于油蒿.在生长季内两种植物delta13C变化因种类及种植方式不同而异,除混种柠条的delta13C在整个生长季呈降低趋势外,单种柠条、单种油蒿和混种油蒿的delta13C均呈降低-升高-降低的变化趋势,均在7月份达最高值,即水分利用效率在7月份达最高.油蒿和柠条的delta13C因生境不同表现出明显的差异:引种圃的油蒿和柠条的delta13C分别低于水分平衡场;水分平衡场内单种柠条的delta13C高于混种,油蒿则反之;植物叶片含水量与delta13C的变化呈相反变化趋势.两种植物的delta13C逐月变化量(Delta13Cm)与气象因子的响应程度因其种类而异,其中油蒿Delta13Cm与月降雨量、月均相对湿度和水汽压负相关,与温度正相关,但均未达显著水平;柠条叶片Delta13Cm与温度极显著正相关,表明柠条生长对温度敏感,而油蒿则对水分和温度均有一定程度的响应.
英文摘要	By analyzing the stable carbon isotope ratios (S13C) of Caragana korshinskii (CK) and Artemisia ordosica (AO) under different planting regimes and microhabitats in Shapotou Station, the variations of plant leaf 813C and effects of climatic factors, such as rainfall, relative humidity and temperature? on plant duC were investigated. Results show that the S13C values of CK were higher significantly than that of AO’s (P = 0. 003), namely the efficiency of water use of CK was high-er than that of AO. During the growth period, the variations of two plant S13C values varied owing to the difference in species and planting arrange-ments. The S13C of mixed planting AO and single planting CK and AO had the same change trend, i. e. , a decreasing trend before May, an increasing trend (and increasing to the maximum) at July, and then followed by a decreasing trend. Howev-er, variation of S13C of mixed CK decreased during the whole growth period. The S13C of AO- and CK increased along with the decrease of soil water content. The S13C ratios of AO and CK in the intro-duced plants were lower than those in the water cycle test field. In the water cycle test field, the leaf 13C ratios of single planting CK were higher than those of mixed planting CK, and the changing order in $t3C between mixed planting AO and mixed planting CK was inversely. The variations between the S1JC ratios and the leaf water content of AO and CK are inverse. The responses of the 6"C monthly change values (A13Cm) of AO and CK to climatic factor change with plant species. The A’-’C,,, of AO exhibited a negative relationship with monthly precipitation, mean monthly relative humidity and vapor pressure, and a positive relation-ship with temperature. There were significant relationships between the A13Cra and temperature with CK. It is revealed that the growth of CK was strongly sensitive to temperature change, and the growth of AO was dependent on precipitation, rel-ative humidity and vapor pressure to a certain extent.
中文关键词	沙坡头 ; 微生境 ; 柠条 ; 油蒿
英文关键词	delta13C Shapotou Station micro-habitat 13C Caragana korshinskii Artemisia ordosica
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:2029663
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/2XILL650/205931
作者单位	1.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 2.中国科学院寒区旱区环境与工程研究所, 冰冻圈与环境联合重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	赵良菊,肖洪浪,刘晓宏,等. 沙坡头不同微生境下油蒿和柠条叶片delta13C的季节变化及其对气候因子的响应[J]. 中国科学院西北生态环境资源研究院,2005,27(5):747-754.
APA	赵良菊,肖洪浪,刘晓宏,罗芳,李守中,&陆明峰.(2005).沙坡头不同微生境下油蒿和柠条叶片delta13C的季节变化及其对气候因子的响应.冰川冻土,27(5),747-754.
MLA	赵良菊,et al."沙坡头不同微生境下油蒿和柠条叶片delta13C的季节变化及其对气候因子的响应".冰川冻土 27.5(2005):747-754.