小叶碱蓬和白麻土壤—叶片生态化学计量学特征对不同盐生境的响应

杨欢; 何学敏; 热依汗·阿布力孜; 李进宝; 胡其荣; 巴合别勒德

doi:10.13961/j.cnki.stbctb.2023.05.006

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小叶碱蓬和白麻土壤—叶片生态化学计量学特征对不同盐生境的响应

试验研究

- 小叶碱蓬和白麻土壤—叶片生态化学计量学特征对不同盐生境的响应
- Characteristics and Response of Soil-leaf Ecological Stoichiometry of Suaeda Microphylla and Apocynum Pictum Under Different Salt Habitats
- 水土保持通报 2023年43卷第5期页码：45-52
- 作者机构：
  
  1. 新疆大学生态与环境学院,新疆,乌鲁木齐,830046
  2. 绿洲生态教育部重点实验室,新疆,乌鲁木齐,830046
  3. 新疆精河温带荒漠生态系统教育部野外科学观测研究站,新疆,乌鲁木齐,830046
- 作者简介：
- 基金信息：
  
  自治区研究生科研创新项目“艾比湖不同生境下三种盐生植物生物移盐能力评估”(XJ2022G066);国家自然科学基金“荒漠胡杨林'盐肥岛效应’下的土壤呼吸及养分盐分协同调控机制”，“再生水和清水灌溉组合模式对梭梭幼苗生理生态影响机理研究” (3210136,1760168);新疆维吾尔自治区中央引导地方科技发展资金项目(ZYYD2023A03)
- DOI：10.13961/j.cnki.stbctb.2023.05.006
  中图分类号： S718.53
- 纸质出版：2023
- 稿件说明：
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杨欢, 何学敏, 热依汗·阿布力孜, 等. 小叶碱蓬和白麻土壤—叶片生态化学计量学特征对不同盐生境的响应[J]. 水土保持通报, 2023,43(5):45-52.

Yang Huan, He Xuemin, Reyihan·Abulizi, et al. Characteristics and Response of Soil-leaf Ecological Stoichiometry of Suaeda Microphylla and Apocynum Pictum Under Different Salt Habitats[J]. Bulletin of Soiland Water Conservation, 2023, 43(5): 45-52.
杨欢, 何学敏, 热依汗·阿布力孜, 等. 小叶碱蓬和白麻土壤—叶片生态化学计量学特征对不同盐生境的响应[J]. 水土保持通报, 2023,43(5):45-52. DOI： 10.13961/j.cnki.stbctb.2023.05.006.

Yang Huan, He Xuemin, Reyihan·Abulizi, et al. Characteristics and Response of Soil-leaf Ecological Stoichiometry of Suaeda Microphylla and Apocynum Pictum Under Different Salt Habitats[J]. Bulletin of Soiland Water Conservation, 2023, 43(5): 45-52. DOI： 10.13961/j.cnki.stbctb.2023.05.006.

摘要

[目的] 分析干旱区盐生植物生境土壤与叶片生态化学计量特征在不同盐生境下变化趋势及主要限制因子，为研究干旱区盐生植物生长发育过程中养分限制因子和适应机制提供基础研究资料，同时为荒漠植物的生态保育和恢复提供参考。[方法] 选取艾比湖湿地国家级自然保护区稀盐盐生植物小叶碱蓬(Suaeda microphylla)和拒盐盐生植物白麻(Apocynum pictum)，测定其生境土壤pH值、含水量、盐分、速效磷、铵态氮、有机碳、全氮、全磷以及植物叶片有机碳、全氮、全磷，分析两种植物叶片与生境土壤生态化学计量特征的关系，探究植物叶片生态化学计量特征的土壤限制因子。[结果] ①随着盐分增加，两种植物生境土壤磷下降，有机碳、氮及化学计量比呈上升趋势，土壤养分含量受盐渍化程度影响显著； ②两种植物叶片氮受土壤盐分影响显著，随盐分降低呈下降趋势，与土壤氮含量的变化趋势一致，叶片N/P平均值均小于14，表明研究区两种植物均受土壤氮含量限制； ③RDA分析表明，影响小叶碱蓬叶片生态化学计量的主要因子为土壤pH值(p=0.034)、含水量(p=0.002)，而白麻主要受土壤磷(p=0.002)、铵氮(p=0.048)影响。[结论] 不同类型盐生植物在土壤—植物生态化学计量特征耦合关系上存在差异。稀盐盐生植物小叶碱蓬主要受土壤pH值、含水量的影响，拒盐盐生植物白麻主要受土壤磷、铵态氮含量影响。

Abstract

[Objective] The change trend and main limiting factors of the ecological stoichiometric characteristics of soil and leaves in different saline habitats were analyzed in order to provide basic research data for the study of nutrient limiting factors and adaptation mechanisms in the growth and development of halophytes in arid areas

and to provide references for ecological conservation and restoration of desert plants. [Methods] The euhalophyte Suaeda microphylla and the pseudohalophyte Apocynum pictum were selected from Ebinur Lake Wetland National Nature Reserve. Soil pH value

water content

salinity

available phosphorus

ammonium nitrogen

organic carbon

total nitrogen

total phosphorus

plant leaf organic carbon

total nitrogen

and total phosphorus were measured in the selected halophytes. The relationship between the ecological stoichiometry of the leaves of the two plants and the soil of their habitats was analyzed to investigate the soil limiting factors on the ecological stoichiometry of plant leaves. [Results] ① Soil phosphorus decreased with increasing salinity

organic carbon

nitrogen

and stoichiometric ratio showed an increasing trend. Salinization degree had a significant effect on soil nutrient content; ② Leaf nitrogen for the two plants was significantly affected by soil salt

and showed a decreasing trend with decreasing soil salt content

which was consistent with the change trend of soil nitrogen content. The mean value of leaf N/P was less than 14

indicating that both plants in the study area were limited by soil nitrogen content. [Conclusion] There were differences in the coupling relationship of soil-plant ecological stoichiometric characteristics among different types of halophytes. The euhalophyte S. microphylla was mainly affected by soil pH value and water content

while the pseudohalophyte A. pictum was mainly affected by soil phosphorus and ammonium nitrogen content.

关键词

Keywords

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