[1]高慧蓉,王志波,龚浩鑫,等. 太白山植物叶片和细根氮含量沿海拔梯度的变异规律[J].西北林学院学报,2024,39(1):162-168.[doi:10.3969/j.issn.1001-7461.2024.01.22]
　GAO Hui-rong,WANG Zhi-bo,GONG Hao-xin,et al. Changes in Nitrogen Content of Fine Roots and Leaves Along Altitudinal Gradients in the Taibai Mountain[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2024,39(1):162-168.[doi:10.3969/j.issn.1001-7461.2024.01.22]
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 太白山植物叶片和细根氮含量沿海拔梯度的变异规律()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第39卷
期数:
2024年第1期
页码:
162-168
栏目:
出版日期:
2024-01-31

文章信息/Info

Title:
 Changes in Nitrogen Content of Fine Roots and Leaves Along Altitudinal Gradients in the Taibai Mountain
文章编号:
1001-7461(2024)01-0162-07
作者:
 高慧蓉1; 王志波2; 3; 龚浩鑫1; 朱荣1; 杨雪1; 陈爽1; 王小春1; 张明1; 王瑞丽1*
 （1.西北农林科技大学 林学院，陕西 杨陵 712100；2.西北农林科技大学 水土保持研究所，陕西 杨陵 712100；3.中国科学院 水利部水土保持研究所，陕西 杨陵 712100）
Author(s):
 GAO Hui-rong1; WANG Zhi-bo2; 3; GONG Hao-xin1; ZHU Rong1; YANG Xue1; CHEN Shuang1; WANG Xiao-chun1; ZHANG Ming1; WANG Rui-li1*
 (1.College of Forestry,Northwest A&F University,Yangling 712100,Shaanxi,China; 2.Institude of Soil and Water Conservation,Northwest A&F University,Yangling 712100,Shaanxi,China; 3.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100,Shaanxi,China)
关键词:
 ; 氮含量; 叶片; 细根; 海拔梯度; 太白山
Keywords:
 ; nitrogen content;  leaf;  fine root;  altitudinal gradient;  the Taibai Mountain
分类号:
S718.51
DOI:
10.3969/j.issn.1001-7461.2024.01.22
文献标志码:
A
摘要:
 氮（N）是植物生长发育的关键性限制元素，其在植物地上、地下器官间的权衡分配是植物重要的适应策略，目前不同器官N含量的变异规律及分配机制仍不清楚。以秦岭太白山北坡为研究地点，沿海拔梯度选取落叶栎林、桦木林、巴山冷杉林、太白红杉林和高山灌丛带的74种木本和草本植物，通过野外取样、室内测定获得叶片和细根的N元素含量，旨在阐明叶片和细根N元素沿海拔梯度的变异规律及N元素在2种器官间的分配策略。结果表明：1）在全部物种和不同生长型中，叶片N含量（21.51~24.21 mg·g-1）均显著高于细根（12.32~13.57 mg·g-1，P＜0.05）。2）木本植物细根N含量随海拔升高而逐渐呈降低趋势，而草本植物叶片和细根中的N含量则相反。3）叶片N含量与气候和土壤因素显著相关，而细根N含量有更强的系统发育保守性，且较少受到环境因素的影响。这些结果表明，N元素的变异规律及其驱动因素在不同器官和不同生长型中均存在差异，未来在生态化学计量研究中需要综合考虑植物不同器官和不同生长型对环境变化的适应策略。
Abstract:
 Nitrogen (N) is a key limiting element for plant growth and development,and its trade-off distribution between above-and under-ground organs is an important adaptation strategy for plants.However,the variation patterns and allocation mechanisms of N content in different organs are still unclear.Taking the northern slope of the Taibai Mountain in the Qinling Mountains as the research location,74 species of woody and herbaceous plants from deciduous oak forest,birch forest,Abies fargesii forest,Larix potaninii var.chinensis forest and alpine shrubland were selected along the altitudinal gradients.The N contents in leaves and fine roots were obtained through field sampling and indoor measurements.We aimed to elucidate the variation of N element in leaves and fine roots along the altitudinal gradient and the allocation strategies between two organs.The results showed that 1) N content in leaves was significantly higher than that in fine roots across all species and different growth types (21.51-24.21 vs.12.32-13.57mg·g-1,P＜0.05).2) The N content in fine roots of woody plants gradually decreased with the increase of altitude,while that in leaves and fine roots of herbaceous plants showed an opposite trend.3) Leaf N content was significantly affected by climatic and soil factors,whereas N content of fine roots had strong phylogenetic conservation and was less affected by environmental factors.These results suggest that the variation in N element and its driving factors differ among different plant organs and growth types.In the future,the adaptation strategies of different organs and different growth types of plants to environmental changes need to be comprehensively considered in the ecological chemometric research.

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备注/Memo

备注/Memo:
 收稿日期：2022-11-11修回日期：2023-02-13
基金项目：国家自然科学基金（32271611）；陕西省高校科协青年人才托举计划项目（20200203）。
第一作者：高慧蓉。研究方向：森林生态学。E-mail：ghr_gao9696@163.com
*通信作者：王瑞丽，副教授，博士，硕士生导师。研究方向：植物功能性状和群落生态学。E-mail：wangrl@nwafu.edu.cn
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