植物资源

科尔沁沙地典型草地植物功能性状及其相互关系

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  • (1. 中国科学院西北生态环境资源研究院奈曼沙漠化研究站,甘肃 兰州730000;2.中国科学院大学, 北京 100049)
张晶(1988-),女,博士研究生,主要从事植物生态方面的研究.E-mail:zhangjing_881014@163.com

收稿日期: 2017-03-16

  修回日期: 2017-05-31

  网络出版日期: 2018-02-06

基金资助

国家自然科学基金项目(41571106,41622103);国家重点研发计划重点专项课题(2016YFC0500506)资助

Plant Functional Traits and Interrelationships of Dominant Species on Typical Grassland in Horqin Sandy Land, China

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  • (1.Naiman Desertification Research Station, Northwest Institute of Eco-Environmental and Resources, Chinese Academy of Sciences, Lanzhou Gansu 730000; 2. University of Chinese Academy of Sciences, Beijing 100049)

Received date: 2017-03-16

  Revised date: 2017-05-31

  Online published: 2018-02-06

摘要

以科尔沁沙地长期封育草地的19种植物为对象,分别测定植物高度(Height)、比叶面积(SLA)、叶片干物质含量(LDMC)、碳含量(LNC)、氮含量(LNN)5个植物功能性状,比较不同生活型(一二年生植物、多年生植物)和功能型(C3植物、C4植物)植物功能性状的差异性,探讨沙地内典型草地不同植物功能性状的内在联系及其对环境的适应性。结果表明:多年生植物的LDMC极显著大于一二年生植物,且C3植物的高度显著大于C4植物;对于一二年生植物而言,C3植物的LNC显著大于C4植物;对于C4植物而言,多年生植物的LDMC和LNC显著大于一二年生植物。植物功能性状相关分析表明,SLA与LDMC极显著负相关,LNC与LNN极显著正相关。科尔沁沙地长期封育草地植物不同生活型、功能型的功能性状存在明显差异,多年生C4植物具有较强的生态适应能力。

本文引用格式

张晶, 左小安, 吕朋, 岳喜元, 张婧 . 科尔沁沙地典型草地植物功能性状及其相互关系[J]. 干旱区研究, 2018 , 35(01) : 137 -143 . DOI: 10.13866/j.azr.2018.01.17

Abstract

Base on the nineteen dominant species in Horqin sandy land under enclosure, five functional traits of height (Height), specific leaf area (SLA), leaf dry matter content (LDMC), leaf carbon content (LNC) and leaf nitrogen content (LNN) were measured. The functional traits differ in two kinds of life forms (annual/biennial plants, perennial plants) and two kinds of photosynthetic pathways (C3 plants and C4 plants). We compared and analyzed the discrepancy in functional traits between different life forms and photosynthetic. Furthermore, the inter relationship of functional traits and their adaptability to the environment in typical grassland were discussed. The results showed that the LDMC of perennial plants was significantly higher than that of annual/biennial plants. Regarding to the perennial plants, the Height of C3 plants was significantly higher than that of the C4 plants. For the annual/biennial plants, the LNC of C3 plants was significantly higher than that of the C4 plants. Relative to the C4 plants, the LDMC and LNC of the perennial plants were significantly higher than that of the annual/biennial plants. Correlation analyses showed that SLA and LDMC were extremely significantly negatively correlated, while, LNC and LNN were extremely significantly positive correlated. Based on the above results, we concluded the following conclusion: there are obvious discrepancy in the plant functional traits between different life forms and photosynthetic in enclosure grassland ecosystem. Perennial C4 plants have stronger adaptability to drought environment.

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