四种藜科植物不同器官主要营养元素化学计量特征比较

doi:10.13292/j.1000-4890.202303.012

摘要/Abstract

摘要： 土壤营养匮乏是盐碱地植物生物量的主要限制因子之一，藜科植物是盐碱地的优势类群。为了明晰盐环境中不同藜科植物主要营养元素计量特征及其与矿质土壤环境间的关系差异，本研究以呼伦贝尔4种典型藜科植物——碱蓬（Suaeda glauca）、尖头叶藜（Chenopodium acuminatum）、刺沙蓬（Salsola tragus）、雾冰藜（Bassia dasyphylla）为对象，比较4种藜科植物生境土壤因子和不同器官7种元素计量特征。结果显示：（1）碱蓬种群土壤Na含量和土壤电导率显著高于其他3种藜科植物种群，刺沙蓬种群土壤N含量最低，雾冰藜种群土壤P含量最低。（2）叶片C/N依次为碱蓬种群>刺沙蓬种群>尖头叶藜种群>雾冰藜种群，尖头叶藜种群根C/P显著高于其他3种植物。雾冰藜种群、碱蓬种群和刺沙蓬种群叶N/P>16，除尖头叶藜种群外，3种植物种群根N/P<14。（3）雾冰藜种群具有显著高的叶、茎和根K含量，刺沙蓬种群具有显著高的叶、根Ca含量，碱蓬种群具有显著高的叶、茎和根Na含量，雾冰藜种群具有显著高的叶、根Mg含量。（4）刺沙蓬种群各器官具有显著高的N富集系数和Ca富集系数，雾冰藜种群各器官具有显著高的P富集系数和K富集系数，碱蓬种群各器官具有显著高的Na富集系数。结果表明，碱蓬具有最高的N利用效率，尖头叶藜根具有最高的P利用效率，碱蓬从土壤中吸收Na能力最强，雾冰藜从土壤中吸收P和K能力最强，刺沙蓬从土壤中吸收N和Ca能力最强。

关键词: 盐碱地, 藜科植物, 营养元素, 生态化学计量

Abstract: Soil nutrient deficiency is one of the main factors limiting plant biomass in saline-alkali land. Chenopodiaceae is a dominant group in saline-alkali land. In this study, four Chenopodiaceae species, Suaeda glauca, Chenopodium acuminatum, Salsola tragus, and Bassia dasyphylla, were selected to evaluate the difference of quantitative characteristics of habitat soil factors and seven elements in different organs, aiming to clarify plant stoichiometry and its relationship with soil nutrients in saline-alkali ecosystems. The results showed that: (1) Soil Na content and soil electronic conductivity of S. glauca population were significantly higher than that of the other three species. Soil N content in S. tragus population was the lowest, while soil P content was the lowest in B. dasyphylla population. (2) Foliar C/N was in an order of S. glauca>S. tragus>C. acuminatum>B. dasyphylla. Root C/P of C. acuminatum was significantly higher than that of the other three species. Foliar N/P was more than 16 and root N/P was less than 14 in all species except C. acuminatum. (3) The K contents in all organs were significantly higher in B. dasyphylla. The Ca contents in leaves and roots were significantly higher in S. tragus. The Na contents in all organs were significantly higher in S. glauca. Mg contents in leaves and roots were significantly higher in B. dasyphylla. (4) The N enrichment coefficients and Ca enrichment coefficients in all organs were significantly higher in S. tragus. The P enrichment coefficients and K enrichment coefficients in leaves, stems and roots were significantly higher in B. dasyphylla. The Na enrichment coefficients in all organs were significantly higher in S. glauca. Our results indicated that N use efficiency was the highest in S. glauca, P use efficiency in roots was the highest in C. acuminatum, S. glauca had the strongest ability to absorb Na from soil, B. dasyphylla had the strongest ability to absorb P and K from soil, and S. tragus had the strongest ability to absorb N and Ca from soil.

Key words: saline-alkali land, Chenopodiaceae, nutrient element, ecological stoichiometry.

苏宇航, 宋晓倩, 郑晶文, 张衷华, 唐中华. 四种藜科植物不同器官主要营养元素化学计量特征比较[J]. 生态学杂志, 2023, 42(3): 626-634.

SU Yuhang, SONG Xiaoqian, ZHENG Jingwen, ZHANG Zhonghua, TANG Zhonghua. Comparison of stoichiometric characteristics of main nutrients in different organs of four Chenopodiaceae species.[J]. Chinese Journal of Ecology, 2023, 42(3): 626-634.

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四种藜科植物不同器官主要营养元素化学计量特征比较

Comparison of stoichiometric characteristics of main nutrients in different organs of four Chenopodiaceae species.

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