干旱区生态环境知识资源中心(Arid): 不同土壤水分条件下荒漠植物白麻光合生理特性的比较

Arid

	不同土壤水分条件下荒漠植物白麻光合生理特性的比较
其他题名	Comparison on Photosynthetic Physiological Characteristics of Poacynum Pictum (Schrenk.)Bail.of Desert Species under Different Soil Water Contents
	孙丽君; 吕光辉; 田幼华; 张雪妮; 张雪梅
来源期刊	新疆农业科学
ISSN	1001-4330
出版年	2011
卷号	48 期号:4 页码:755-760
中文摘要	【目的】比较不同生境中白麻的光合特征及其与内外影响因素的相关关系。【方法】利用LI-6400便携式光合仪,在艾比湖湿地自然保护区自然条件下,比较研究土壤含水量分别为6.1%、4.3%和2.8%三种不同生境中荒漠植物白麻成熟叶片的光合生理特征。【结果】(1)随着土壤水分含量的减小,三种生境中白麻的净光合速率也随之减小;光合日进程均呈双峰曲线,有较明显的午休现象,峰值出现的时间因生境和水分条件的不同而发生变化。(2)蒸腾速率的日动态变化有单峰和不明显双峰两种,其中土壤水分为6.1%的白麻植株呈双峰曲线;植物叶片水分利用效率的不同说明该植物在不同的水分条件下,表现出弹性的水分适应现象。(3)通过对生理生态因子的相关分析表明,影响白麻净光合速率(Pn)的主要因子是光合有效辐射强度 (PAR)、气孔导度(Gs)。此外,胞间CO_2浓度(Ci)也是影响Pn的重要因子。【结论】白麻属于高光合、高蒸腾型植物,且午前的光合能力大于午后;光合有效辐射的变化是影响白麻光合速率的直接因素,浅层土壤含水量对白麻光合作用的制约不大。
英文摘要	[Objective] In order to compare the photosynthetic characteristics of Poacynum pictum (Schrenk.)Bail.in different inhabitats and the correlation between internal and external factors.[Method] The photosynthetic physiological characteristics of Poacynum pictum (Schrenk.)Bail.in three different habitats were studied with LI-6400 portable photosynthesis system under the nature condition in Ebinur Lake Wetland Nature Reserve,Xinjiang.The three different habitats have different soil moisture conditions,with soil water contents from 2 8% to 4.3% and 6.1% .[Result (1)With the decrease of soil moisture content,the net photosynthetic rate of desert species Poacynum pictum (Schrenk)Bail in three different habitats were decreased.There were double peak curve during photosynthetic diurnal course,and there was a clear depression at noon respectively,because the different habitats and soil moisture conditions peak value turned up at different time.(2)The diurnal course of the transpiration rate of Poacynum pictum (Schrenk.)Bail.has a double peak in the habitat of 6.1% soil moisture condition,and single peak in the other two habitats,which indicate the Poacynum pictum (Schrenk.)Bail.shows flexibility in water adaptive mechanism.(3)PAR,Gs and Ci are the three most typical factors which affect the photosynthetic physiological characteristics of Poacynum pictum (Schrenk.)Bail.[Conclusion] Poacynum pictum (Schrenk.)Bail.belongs to" high photosynthetic rate,high transpiration" type plants and the photosynthetic capacity in morning is more stronger than afternoon.The change of photosynthetic available radiation is the direct factor to affect the photosynthetic rate of Poacynum pictum (Schrenk.)Bail..The shallow soil water content has little affect on the photosynthetic rate of Poacynum pictum (Schrenk.)Bail.
中文关键词	荒漠植物白麻 ; 土壤水分条件 ; 净光合速率 ; 蒸腾速率 ; 水分利用效率
英文关键词	desert species Poacynum pictum (Schrenk.)Bail. soil water content net photosynthetic rate transpiration rate water use efficiency
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4207282
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227273
作者单位	新疆大学资源与环境科学学院, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	孙丽君,吕光辉,田幼华,等. 不同土壤水分条件下荒漠植物白麻光合生理特性的比较[J]. 新疆大学,2011,48(4):755-760.
APA	孙丽君,吕光辉,田幼华,张雪妮,&张雪梅.(2011).不同土壤水分条件下荒漠植物白麻光合生理特性的比较.新疆农业科学,48(4),755-760.
MLA	孙丽君,et al."不同土壤水分条件下荒漠植物白麻光合生理特性的比较".新疆农业科学 48.4(2011):755-760.