干旱区生态环境知识资源中心(Arid): 艾比湖流域2种典型荒漠盐生植物冠下土与叶片的生态化学计量特征

Arid

	艾比湖流域2种典型荒漠盐生植物冠下土与叶片的生态化学计量特征
其他题名	Ecological Stoichiometry Characteristics in the Soil under Crown and Leaves of Two Desert Halophytes with Soil Salinity Gradients in Ebinur Lake Basin
	龚雪伟 1; 吕光辉2 ; 马玉 1; 张雪妮 2; 何学敏 2; 郭振洁 1
来源期刊	林业科学
ISSN	1001-7488
出版年	2017
卷号	53 期号:4 页码:28-36
中文摘要	【目的】探明荒漠盐生植物冠下土与叶片生态化学计量特征沿盐分梯度的变异及影响叶片元素计量特征的主要土壤因子,为干旱盐渍化区域生态保育提供理论依据。【方法】以新疆艾比湖流域2种典型荒漠盐生植物骆驼刺和白刺为研究对象,按照盐分梯度对2种植物分别选取3个10 m * 10 m样方,基于216个冠下土和植物样品,综合分析不同盐分梯度下骆驼刺(轻度、中度和重度)和白刺(中度和重度)冠下土与叶片碳( C)、氮( N)、磷( P)化学计量特征,并利用冗余分析探究影响盐生植物叶片生态化学计量的主要土壤因子。【结果】盐分适度增加能明显提升荒漠盐生植物冠下土C、N、P含量,但高盐降低骆驼刺冠下土C、N、P含量;骆驼刺冠下土C∶ N与C∶ P以中盐样方最大,而白刺冠下土C∶ N、C∶ P、N∶ P中盐与高盐样方之间均无显著差异( P > 0. 05)。白刺叶片C、N、P含量随盐分提高而显著增加( P < 0. 05),C∶ N与C∶ P表现为中盐>高盐;低盐增加骆驼刺叶片C和P含量,降低N含量,中盐导致骆驼刺叶片C∶ N与C∶ P升高。2种荒漠盐生植物叶片N∶ P在不同盐分梯度下均无显著差异( P > 0. 05),均值分别为15. 41 2. 16、8. 10 0. 83。冗余分析表明,冠下土P含量和盐碱度分别是影响骆驼刺和白刺叶片C、N、P化学计量特征的主要因素。【结论】土壤盐分适度增加能提升荒漠盐生植物冠下土C、N、P含量,改变植物叶片的C、N、P含量及C∶ P。盐生植物叶片生态化学计量受土壤盐碱度和元素含量的双重影响。
英文摘要	【Objective】This study aimed to investigate the variation of stoichiometry in soil under crown and in leaves of desert halophytes along soil salinity gradients,and the major soil factors that affect leaf stoichiometry of desert halophytes, which is of great significance to ecological conservation in drought and salinization zone. 【Method】This study was conducted at the Ebinur Lake Wetland National Nature Reserve in Xinjiang Uygur Autonomous Region of China. Three plots with 10 m * 10 m for each desert halophyte ( Alhagi sparsifolia and Nitraria tangutorum) were set along soil salinity gradients. Based on the 216 samples of soil under crown and plant,the concentration of carbon ( C) ,nitrogen ( N) and phosphorus ( P) and the ratios of C∶ N,C∶ P,and N∶ P in soil under crown and leaves of two desert halophytes in different soil salinity gradients were studied. Besides,the main soil properties that affect the leaf stoichiometry of the two halophytes were determined with redundancy analysis. 【Result】The results showed that a modest increase in the soil salinity obviously improved C,N and P concentration in soil under crown of desert halophytes,while heavy salinity reduced C,N and P concentration in soil under crown of A. sparsifolia. The C∶ N,and C∶ P in soil under the crown of A. sparsifolia in medium salinity were the highest,while the largest values of N∶ P of A. sparsifolia and C∶ N,C∶ P,N∶ P of N. tangutorum appeared in light salinity plot,and,without striking difference with soil salinity gradient ( P > 0. 05) . The concentration of C,N and P in leaves of N. tangutorum increased significantly with the increase of soil salinity( P < 0. 05) . The C∶ N,and C∶ P ratios under medium salinity treatment were greater than that under heavy salinity treatment. Light salinity increased the content of C and P in leaves of A. sparsifolia,but reduced N content. Medium salinity caused increases in C∶ N,and C∶ P in A. sparsifolia leaves. The leaf N∶ P of the two desert halophytes did not show a marked difference ( P > 0. 05) along with salinity gradient,and the average value was 15. 41 2. 16 and 8. 01 0. 83,respectively. Redundancy analysis showed that the P content in soil under crown,and salinity were the main factors that affect C,N and P stoichiometry in A. sparsifolia and N. tangutorum leaves,respectively. 【Conclusion】A modest increase in soil salinity improved the content of C,N,P in the soil under crown,and changed the content of C,N,P and the C∶ P ratio in leaves of the two desert halophytes. Leaf stoichiometry of halophytes was influenced by salinity and sodicity as well as element content in soil,and the interspecific difference resulted in the difference in main soil factor that affected leaf stoichiometry of the two desert halophytes.
中文关键词	骆驼刺 ; 白刺 ; 土壤盐分梯度 ; 排序 ; 冗余分析
英文关键词	Alhagi sparsifolia Nitraria tangutorum soil salinity gradients ordination redundancy analysis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5999823
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/2XILL650/236263
作者单位	1.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; 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, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	龚雪伟,吕光辉,马玉,等. 艾比湖流域2种典型荒漠盐生植物冠下土与叶片的生态化学计量特征[J]. 新疆大学,2017,53(4):28-36.
APA	龚雪伟,吕光辉,马玉,张雪妮,何学敏,&郭振洁.(2017).艾比湖流域2种典型荒漠盐生植物冠下土与叶片的生态化学计量特征.林业科学,53(4),28-36.
MLA	龚雪伟,et al."艾比湖流域2种典型荒漠盐生植物冠下土与叶片的生态化学计量特征".林业科学 53.4(2017):28-36.