干旱区生态环境知识资源中心(Arid): 民勤绿洲梭梭同化枝光合生理特性与形态

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	民勤绿洲梭梭同化枝光合生理特性与形态
其他题名	Photosynthetic,physiological,and morphological characteristics of Haloxylon ammodendron assimilation twigs in Minqin Oasis
	张华 1; 吴睿 2; 康雅茸 2
来源期刊	草业科学
ISSN	1001-0629
出版年	2018
卷号	35 期号:2 页码:371-379
中文摘要	梭梭(Haloxylon ammodendron)是干旱区植被组成中的植被优势种,对区域生态系统稳定有着重要的作用。为进一步揭示生长季内不同时期梭梭同化枝光合生理特性和形态性状及其对环境因子的适应,本研究比较分析了民勤绿洲梭梭同化枝在5月下旬和7月下旬的光合生理特性及形态。结果表明,5月下旬和7月下旬梭梭同化枝净光合速率(P_n) 、蒸腾速率(T_r)和气孔导度(G_s)的日变化均呈现双峰曲线。5月下旬中午前后P_n降低主要是气孔限制因素,7月下旬中午前后P_n降低主要是非气孔限制因素。7月下旬的同化枝面积(LA) 、鲜重(FW) 、干重(DW) 、含水量(LWC) 、干物质含量(LDMC)和比叶面积(SLA)较5月下旬分别增长了79%、94%、99%、33%、14%和3%。LA是梭梭同化枝最具代表性的形态性状。影响5月下旬梭梭同化枝的环境因子主要是光合有效辐射(PAR) 、空气相对湿度(RH)和土壤含水量(SWC),影响7月下旬的主要是大气温度(T_a)和SWC。
英文摘要	Haloxylon ammodendron is a dominant species in arid zones and plays an important role in regional ecosystem stability. In order to more fully understand the photosynthetic,physiological,and morphological characteristics of H. ammodendron and to determine how they adapt to environmental factors,we employed comparative analytical methods to study these traits at the end of May and the end of July in Minqin Oasis. Our results showed that the change trends for assimilation twigs were bimodal on a daily scale for net photosynthetic rate (P_n),transpiration rate (T_r),and stomatal conductance (G_s) in May and July. The P_n reduction was mainly due to stomatal limitation factors in May; the P_n reduction was caused by non-stomatal limitation factors in July. Morphological characteristics,including area (LA),fresh weight (FW),dry weight (DW),water content (LWC),dry matter content (LDMC),and specific leaf area (SLA) increased by 79%,94%,99%,33%,14%,and 3%,respectively,in July more than in May. Area was the most representative morphological character of the assimilation twigs. The environmental impact factors of H. ammodendron were mainly photosynthetically active (PAR),air relative humidity (RH),and soil water content (SWC) in May. Other factors of importance were atmospheric temperature (T_a) and SWC in July.
中文关键词	光合作用 ; 同化枝 ; 生理性状 ; 形态性状 ; 梭梭 ; 民勤
英文关键词	photosynthesis assimilation twigs physiological characters morphological characters Haloxylon ammodendron Minqin
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:6192767
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237313
作者单位	1.西北师范大学地理与环境科学学院;;兰州大学生命科学学院, ;;, 兰州;;兰州, 甘肃;;甘肃 730070;;730000, 中国; 2.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	张华,吴睿,康雅茸. 民勤绿洲梭梭同化枝光合生理特性与形态[J]. 西北师范大学,2018,35(2):371-379.
APA	张华,吴睿,&康雅茸.(2018).民勤绿洲梭梭同化枝光合生理特性与形态.草业科学,35(2),371-379.
MLA	张华,et al."民勤绿洲梭梭同化枝光合生理特性与形态".草业科学 35.2(2018):371-379.