呼伦贝尔盐生藜科植物不同器官C、N、P生态化学计量特征及其与土壤因子的关系  

Ecological Stoichiometric Characteristics of C,N and P and Their Relationship with Soil Factors from Different Organs of the Halophytic Chenopodiaceae Plants in Hulunbuir

作　　者：苏宇航 宋晓倩[1,2] 郑晶文 张衷华 唐中华 SU Yuhang;SONG Xiaoqian;ZHENG Jingwen;ZHANG Zhonghua;TANG Zhonghua(Key Laboratory of Forest Plant Ecology,Ministry of Education,Northeast Forestry University,Harbin 150040;College of Chemistry,Chemical Engineering and Resource Utilization,Northeast Forestry University,Harbin 150040)

机构地区：[1]东北林业大学森林植物生态学教育部重点实验室,哈尔滨150040 [2]东北林业大学化学化工与资源利用学院,哈尔滨150040

出　　处：《植物研究》2022年第5期910-920,共11页Bulletin of Botanical Research

基　　金：科技基础资源调查项目(2019FY100500)。

摘　　要：盐碱土区植物可利用营养匮乏是植物生物量限制的主要因素之一,藜科(Chenopodiaceae)植物是盐碱环境中的最大类群,其整体营养策略对盐碱地育种和农业开发具有重要意义。本研究以呼伦贝尔4种典型盐碱地藜科植物碱蓬(Suaeda glauca)、尖头叶藜(Chenopodium acuminatum)、刺沙蓬(Salsola tragus)、雾冰藜(Bassia dasyphylla)为研究对象,通过分析不同器官C、N、P生态化学计量特征,试图揭示藜科植物C、N、P计量特征共性及其与土壤因子之间的耦合关系。结果显示:(1)藜科植物茎、叶N/P>16,根N/P<14;各器官C、N含量显著相关,且根C含量>茎C含量>叶C含量,N含量表现为叶N含量>茎N含量>根N含量,表明N元素从根、茎到叶之间具有良好的转移效率。(2)相对于C元素和N元素,各器官内P元素含量具有最大变异系数,叶P、茎P含量与叶N、根N含量显著正相关,根P含量与叶N、根N含量显著负相关,表明N、P元素在叶和根中具有较强的协调关系。(3)RDA排序表明土壤P是影响植物叶片化学计量的主要因素,土壤K是茎化学计量变异的主要因素,土壤N是根化学计量变异的主要因素。本研究发现藜科植物通过叶N、叶P积累和N、P协调降低土壤N、P限制的影响,对于盐碱土营养管理具有重要意义。The lack of available nutrients is one of the main factors limiting the biomass of saline plants,the largest group in the saline environment is Chenopodiaceae plants,and the overall nutritional strategy of Chenopodiaceae plants is of great significance to the breeding in saline-alkali soil and agricultural development.four typical Chenopodiaceae plants in Hulunbuir were used as materials,including Suaeda glauca,Chenopodium acuminatum,Salsola tragus and Bassia dasyphylla.In order to reveal the C,N,P stoichiometric characteristics of Chenopodiaceae plants and the relationship with soil factors,the ecological stoichiometric characteristics of carbon(C),nitrogen(N)and phosphorus(P)in different organs were analyzed respectively.The results showed:(1)Both the stem N/P and leaf N/P of Chenopodiaceae plants were greater than 16,and the root N/P of Chenopodiaceae plants was less than 14;The content of C and N in each organ had a significant correlation,root C content>stem C content>leaf C content,The N content of each organ showed the order of leaf N content>stem N content>root N content,it showed that the N element had a good transfer efficiency from roots,stems to leaves.(2)The content variability of C,N and P in various organs was compared,and P had the largest coefficient of variation.There was a significant positive correlation between leaf P and leaf N,stem P content also had a significant positive correlation with leaf N,root N content,and root P content had a significant negative correlation with leaf N and root N content.It indicated that the N and P elements had a strong coordination relationship in leaves and roots.(3)The RDA ranking indicated that Soil P was the main factor affecting plant leaf stoichiometry,soil K was the main factor of stem stoichiometry variation,and soil N was the main factor of root stoichiometry variation.This study found that Chenopodiaceae plants promoted the accumulation the coordination of N,P in leaf,and reduced the impact on soil P and N restrictions,and showed great significance t

关 键 词：盐碱地 藜科植物 生态化学计量 土壤因子 

分 类 号：Q948.12[生物学—植物学]