干旱区生态环境知识资源中心(Arid): 西鄂尔多斯天然荒漠灌丛光合生态适应性

Arid

	西鄂尔多斯天然荒漠灌丛光合生态适应性
其他题名	Photosynthetic characteristics and ecological adaptability of desert shrubs in western Ordos
	党晓宏; 蒙仲举; 高永; 刘阳; 魏亚娟; 哈琴
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2020
卷号	37 期号:2 页码:435-443
中文摘要	为了探究西鄂尔多斯地区荒漠灌丛的光合生态适应性,以4种天然荒漠灌丛半日花(Helianthemum songaricum) 、红砂(Reaumuria songarica) 、沙冬青(Ammopiptanthus mongolicus) 、霸王(Sarcozygium xanthoxylon)为研究材料,利用Li-6400便携式光合测定仪野外原位测定荒漠灌丛日光合动态和季节动态规律。结果表明: ①不同季节灌丛光合作用适宜的温度存在差异,高温环境使灌丛净光合速率最适温度升高,低温环境使其降低。②不同季节4种灌丛的净光合速率、蒸腾速率、水分利用效率和气孔导度日变化曲线趋势为双峰形,胞间CO_2浓度日变化曲线趋势为W形,但不同季节各指标平均日变化趋势表现各异。③不同季节灌丛净光合能力表现为:沙冬青>霸王>红砂>半日花,说明沙冬青具有较强的生态适应性。④净光合速率和蒸腾速率日变化趋势几乎保持同步状态,表明4种灌丛叶片气孔对外界环境变化反应敏感。⑤水分是限制荒漠灌丛生长发育的关键因素。为了保证荒漠植物的群落稳定性和生物多样性,在夏、秋季需对沙冬青、半日花、红砂和霸王进行水分管理。
英文摘要	To explore the ecological adaptability of desert shrubs in Western Ordos, four shrub species growing in this region were selected as test materials: Helianthemum songaricum,Reaumuria songarica,Ammopiptanthus mongolicus, and Sarcozygium xanthoxylum. Their photosynthetic physiological indices were measured using the Li-6400 photosynthesis system during diurnal and seasonal variations. Optimum temperature for photosynthesis varied across seasons; optimum temperature for net photosynthetic rate in desert shrubs increased in summer and decreased in winter. Diurnal variation curves for net photosynthetic rate, transpiration rate,water use efficiency, stomatal conductance, and intercellular CO_2 concentration of the four dominant desert shrubs in the three seasons werebimodal and assumed the shape ofW; however,average diurnal variation trends of each index varied across seasons. Net photosynthetic rate of the four shrubs varied across seasons and followed the order of A. mongolicus > C. xanthoxylum > R. songarica > H. songaricum; thus,A. mongolicus showed the greatest ecological adaptability. Diurnal trends of net photosynthetic and transpiration rates were almost synchronous, indicating that stomata of these four dominant shrubs were sensitive to environmental changes. Water is a key factor limiting the growth and development of the four desert shrubs studied. To ensure the stability and diversity of desert plant communities,water management was conducted in summer and autumn for the four tested shrubs.
中文关键词	生态适应性 ; 光合作用 ; 优势灌丛 ; 动态变化 ; 西鄂尔多斯 ; 内蒙古
英文关键词	ecological adaptability photosynthesis dominant shrubs dynamic changes western Ordos Inner Mongolia
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6706888
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336400
作者单位	党晓宏, 内蒙古农业大学沙漠治理学院;;内蒙古杭锦荒漠生态系统国家定位观测研究站, ;;内蒙古杭锦荒漠生态系统国家定位观测研究站, 呼和浩特;;鄂尔多斯, 内蒙古;;内蒙古 010018;;017400, 中国.; 高永, 内蒙古农业大学沙漠治理学院;;内蒙古杭锦荒漠生态系统国家定位观测研究站, ;;内蒙古杭锦荒漠生态系统国家定位观测研究站, 呼和浩特;;鄂尔多斯, 内蒙古;;内蒙古 010018;;017400, 中国.; 蒙仲举, 内蒙古农业大学沙漠治理学院, 呼和浩特, 内蒙古 010018, 中国.; 魏亚娟, 内蒙古农业大学沙漠治理学院, 呼和浩特, 内蒙古 010018, 中国.; 刘阳, 内蒙古自治区水利科学研究院, 呼和浩特, 内蒙古 010020, 中国.; 哈琴, 内蒙古赤峰市巴林左旗林业和草原局, 赤峰, 内蒙古 025450, 中国.
推荐引用方式 GB/T 7714	党晓宏,蒙仲举,高永,等. 西鄂尔多斯天然荒漠灌丛光合生态适应性[J]. 内蒙古农业大学,2020,37(2):435-443.
APA	党晓宏,蒙仲举,高永,刘阳,魏亚娟,&哈琴.(2020).西鄂尔多斯天然荒漠灌丛光合生态适应性.干旱区研究,37(2),435-443.
MLA	党晓宏,et al."西鄂尔多斯天然荒漠灌丛光合生态适应性".干旱区研究 37.2(2020):435-443.