干旱区生态环境知识资源中心(Arid): 温带荒漠植物叶片功能性状对土壤水盐的响应

Arid

	温带荒漠植物叶片功能性状对土壤水盐的响应
其他题名	Response ofPlant Leaf Functional Traits to Soil Aridity and Salinity in Temperate Desert Ecosystem
	郄亚栋 1; 蒋腊梅 1; 吕光辉2 ; 杨晓东 3; 王恒方 1; 滕德雄 1
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2018
卷号	27 期号:11 页码:2000-2010
中文摘要	植物叶片功能性状与环境因子的关系一直倍受关注。以艾比湖湿地国家自然保护区荒漠林为研究对象,布设5条30 m*3 000 m样带,设置30个样方,并沿土壤水分(4.20%0.57%)、(9.69%1.95%)、(17.59%0.83%)和盐分(3.450.46)、 (4.720.74)、(6.420.35) g·kg~(-1)环境梯度系统测量了群落中植物的4种叶片性状,包括叶面积、叶厚度、比叶面积和叶绿素含量等,试图寻找干旱和盐渍化双重胁迫下物种、生活型和群落3种水平上叶片功能性状的调整策略,并对是否出现策略响应现象作出可能解释。结果表明,(1)物种水平上,只有花花柴(Karelinia caspica)和罗布麻(Apocynum venetum)的叶绿素含量与土壤盐分表现出显著线性关系,前者为正相关关系(P<0.05),后者为负相关关系(P<0.01);所有植物叶片厚度与土壤水分、盐分和水盐比均无显著线性关系(P>0.05);罗布麻和白刺(Nitraria schoberi)的叶片面积与土壤水分和水盐比均呈显著负相关关系(P<0.05),多枝柽柳(Tamarix ramosissima)与土壤盐分有显著正相关关系(P<0.05);芦苇(Phragmites australis)、白刺、梭梭(Haloxylon ammodendron)和胡杨(Populus euphratica)的比叶面积与土壤水分和土壤水盐比之间有显著正相关关系(P<0.05)。说明在温带荒漠区,深根系植物能利用更多资源,减弱盐害作用,更易保持叶片功能来适应盐、旱胁迫。(2)生长型水平上,沿着土壤水盐梯度(Ⅰ高水高盐-Ⅱ中水中盐-Ⅲ低水低盐),草本和乔木植物的叶片厚度均呈逐渐升高趋势,叶绿素、叶片面积和比叶面积都呈逐渐下降的趋势;灌木叶片厚度呈倒V型变化,叶绿素、叶片面积和比叶面积呈V型变化。乔木和草本权衡叶片厚度与面积之间碳投资的功能,以及灌木的丛生特性体现了温带荒漠区不同生长型植物适应不同胁迫环境的生长策略。(3)群落水平上,叶片功能性状在Ⅱ梯度下与I梯度或Ⅲ梯度之间呈显著差异;并且土壤盐分含量和土壤水分含量的解释量均较大,其中土壤盐分含量的解释量最大,为13.7%,土壤水盐比值的解释量最小,为2.4%。说明不同水盐梯度下,群落植物叶片性状梯度性的功能调节保持着资源优化配置,侧面反映出水盐异质性分布在一定程度上决定了温带荒漠区植物群落构建。
英文摘要	The relationship between plant leaf function traits and environmental factors has been attracted much attention in recent years. This paper took the desert forest as the research object, which locates on the north shore of Aqikesu in the Ebinur Basin of Xinjiang, China. We layout 5 belts, with a area of 30 m*3 000 m for each belt, and systematically measured 4 leaf traits along the environmental gradients of soil moisture and salinity, in which the soil moisture gradient was (4.20%0.57%), (9.69%1.95%), (17.59%0.83%) and the soil salinity gradient was (3.450.46), (4.720.74), (6.420.35) g·kg~(-1). Leaf traits included leaf area, specific leaf area, leaf thickness and chlorophyll content. We aimed to find the regulation mechanism of functional traits of plant leaves at the species, growth and community levels, respectively, and so as to make an explanation that whether there is a strategy response phenomenon. The results showed that: (1) On the level of species, only the chlorophyll content of Karelinia caspica and Apocynum venetum showed a linear relationship with soil salinity, the former showed a positive correlation (P<0.05), but the latter showed a negative correlation (P<0.01). There was no significant linear relationship between all plants leaf thickness and soil moisture and salinity (P>0.05). The leaf area of Apocynum venetum and Nitraria schoberi showed a significant negative correlation with soil moisture and the ratio of water to salt, respectively (P<0.05). There was a significant negative correlation between Tamarix ramosissima and soil salinity. There was significant positive correlation between specific leaf area of Phragmites australis, Nitraria schoberi, Haloxylon ammodendron and Populus euphratica and soil moisture and the ratio of water to salt (P<0.05). These phenomena indicated that deep root plants in temperate desert area could utilize more resources, weaken salt damage, and more easily maintain leaf function to adapt to salt and drought stress. (2) At the growth level, as the gradient of soil aridity and salinity ranged fromⅠhigh water-salt content, -Ⅱ moderate water-salt content, to Ⅲ low water-salt content, the leaf thickness of herbaceouses and trees increased leaf area and specific leaf area decreased, gradually. The leaf thickness of shrub showed an inverted V type, and chlorophyll content, leaf area and specific leaf area showed a V type change from high (Ⅰ) to middle (II) to low (Ⅲ) along the gradient with moisture and salinity. These phenomena indicated that trees and herbs weighed the function of carbon investment between leaf thickness and its area, and the cluster characteristics of shrubs reflected the growth strategies of different growing plants in temperate desert areas to adapt to different stress environments. And (3) on the level of community, there was a significant difference in leaf functional traits between Ⅱ gradient and I gradient or Ⅲ gradient. The amount of soil salinity and soil moisture content waslarger, and the explanatory volume of soil salinity was the largest, which accounted for 13.7%, and the ratio of soil water to salt was the least, which was 2.4%. The above results show that under different water and salt gradients, the functional adjustments of the gradients of plant leaf traits in the community keep a optimal allocation of resources, which reflect from the side that the distribution of effluent salinity determins the construction of plant communities in temperate desert areas to a certain extent.
中文关键词	干旱区 ; 生长型 ; 植物群落 ; 叶片功能性状 ; 水盐梯度
英文关键词	arid area growth forms plant community leaf functional traits water and salt gradient
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:6379716
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/2XILL650/238088
作者单位	1.新疆大学干旱生态环境研究所;;绿洲生态教育部重点实验室;;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;;乌鲁木齐;;乌鲁木齐, 新疆;;新疆;;新疆 830046;;830046;;830046, 中国; 2.新疆大学干旱生态环境研究所;;绿洲生态教育部重点实验室, ;;绿洲生态教育部重点实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830046;;830046, 中国; 3.绿洲生态教育部重点实验室;;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;;乌鲁木齐, 新疆;;新疆 830046;;830046, 中国
推荐引用方式 GB/T 7714	郄亚栋,蒋腊梅,吕光辉,等. 温带荒漠植物叶片功能性状对土壤水盐的响应[J]. 新疆大学,2018,27(11):2000-2010.
APA	郄亚栋,蒋腊梅,吕光辉,杨晓东,王恒方,&滕德雄.(2018).温带荒漠植物叶片功能性状对土壤水盐的响应.生态环境学报,27(11),2000-2010.
MLA	郄亚栋,et al."温带荒漠植物叶片功能性状对土壤水盐的响应".生态环境学报 27.11(2018):2000-2010.