天然林中不同径级新疆野苹果的光合能力

	天然林中不同径级新疆野苹果的光合能力
其他题名	Photosynthetic Capacity of Malus sieversii Trees in Natural Forest
	毛培利 ; 臧润国 ; 白志强 ; 许正 ; 郭仲军 ; 刘端
发表期刊	干旱区研究
ISSN	1001-4675
	2012-09-15
卷号	29 期号:5 页码:784-790
关键词	新疆野苹果(Malus Sieversii) 净光合速率比叶面积气孔导度野果林新源县新疆
产权排序	中国科学院烟台海岸带研究所滨海湿地生态实验室中国科学院山东省海岸带环境过程重点实验室;中国林业科学研究院森林生态环境与保护研究所国家林业局森林生态环境重点实验室;新疆林业科学研究院森林生态研究所;新疆伊犁州园艺科学研究所野果林资源研究发展中心;
通讯作者	臧润国 zangrung@caf.ac.cn
作者部门	中科院海岸带环境过程与生态修复重点实验室
英文摘要	研究新疆天山野果林建群种新疆野苹果(Malus sieversii)光合生理特性;对于该种群保育及其生态功能评价具有重要意义。通过野外测定新疆新源天然野果林中不同径级64株新疆野苹果南向枝条上部叶和下部叶饱和光强下的净光合速率(A)、气孔导度(gs)和比叶面积(SLA)。结果表明:随着径级增加;上部叶和下部叶的Aarea、Amass显著增加。gs随径级的增加先增加再降低;在径级Ⅲ(树干0.5 m高处直径25～35 cm)时达最大。上部叶比下部叶有着高的Aarea、Amass和gs。回归分析表明:随着树干直径增加;Aarea和gs呈二次多项式增加;Amass呈线性增加。SLA随径级增加变化不显著;上部叶SLA显著低于下部叶。上部叶的Aarea高于下部叶;但由于SLA显著减小;在Amass上两者差异减小。随gs增加;上部叶Aarea呈幂函数增加;下部叶Aarea呈二次多项式增加。
中文摘要	Photosynthesis is a basic eco-physiological process for the functioning of ecosystems. Malus sieversii （ Ledeb. ） Roem. is the most important dominant species in the wild fruit forest on the northern slope of the Tians-han Mountains in northwest China. M. sieversi population has been declining rapidly due to more and more inten-sive anthropogenic disturbances. Research on the photosynthetic characteristics of M. sieversii of different size clas-ses is critical to understand the functions of its dominated ecosystems and to take proper measures to conserve this endangered species. Net assimilation rate （A）, stomotal conductance （gs） and specific leaf area （SLA） of sun-fa-cing M. sieversii leaves at upper and lower parts of 64 adult trees were .measured in a natural wild fruit forest in Xinyuan County on the northern slope of the Tianshan Mountains in Xinjiang, northwest China. The results showed that there was a significant effect of stem diameter class on photosynthetic characteristics of M. sieversii. Both Aarea and Amass were increased with the increase of diameter class, whereas gs was incieased at first and then decreased, and the maximum values appeared at the main stem diameter of 25 - 35 cm at 0.5 m height. There was a signifi-cant effect of leaf position on photosynthetic characteristics. Amarea,Amass and gs of the leaves on the upper part of branches were significantly higher than those on the lower part. The results of regression analysis revealed that Aarea and gs were increased in a quadratic polynomial way with the increase of stem diameter, whereas Amass was in- creased in a linear relation. With the increase of diameter class, the change of SLA was not significant. There was a significant effect of leaf position on SLA. SLA of the leaves on the upper part of crown was significantly lower than that on lower part, and the differences of Amass between the leaves on the upper and lower parts was low. A area of the leaves on both upper and lower parts was increased with the increase of gs, but the regression equations were different. Aarea of upper leaves was increased in a power function with the increase of gs, whereas Aarea of lower leav-es was increased in a quadratic polynomial way with the increase of gs.
资助机构	公益性行业科研专项项目(200704016)
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:4634170
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/5854
专题	中国科学院海岸带环境过程与生态修复重点实验室
推荐引用方式 GB/T 7714	毛培利,臧润国,白志强,等. 天然林中不同径级新疆野苹果的光合能力[J]. 干旱区研究,2012,29(5):784-790.
APA	毛培利,臧润国,白志强,许正,郭仲军,&刘端.(2012).天然林中不同径级新疆野苹果的光合能力.干旱区研究,29(5),784-790.
MLA	毛培利,et al."天然林中不同径级新疆野苹果的光合能力".干旱区研究 29.5(2012):784-790.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
天然林中不同径级新疆野苹果的光合能力.p（416KB）			开放获取	--	浏览下载