科尔沁沙地典型草地植物功能性状及其相互关系

doi:10.13866/j.azr.2018.01.17

Abstract

Abstract: In this study,five functional traits including the height,specific leaf area (SLA),leaf dry matter content (LDMC),leaf carbon content (LNC) and leaf nitrogen content (LNN) of 19 dominant plant species on the Horqin sandy land under enclosure were measured.The functional traits differed in two life forms (annual/biennial plants and perennial plants) and two photosynthetic pathways (C₃ plants and C₄ plants).The discrepancies in functional traits between different life forms and photosynthetic pathways were compared and analyzed.Furthermore,the interrelations of functional traits and the adaptabilities of the plant species to the environment in the 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 those of the annual/biennial plants.Correlation analyses showed that there was an extremely significant negative correlation between SLA and LDMC,but an extremely significant positive one between LNC and LNN.Based on the results above,following conclusions were obtained: there were the obvious discrepancies in the plant functional traits between the different life forms and the different photosynthetic pathways in the enclosure grassland ecosystem.The adaptability of perennial C₄ plants to drought environment was strong.

Key words: grassland plant, functional trait, life form, photosynthetic pathway, Horqin sandy land

ZHANG Jing, ZUO Xiao-an, LV Peng, YUE Xi-yuan, ZHANG Jing. Functional Traits and Interrelations of Dominant Plant Species on Typical Grassland in the Horqin Sandy Land,China[J].Arid Zone Research, 2018, 35(1): 137-143.

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

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