中国草地学报2025，Vol.47Issue(5)：55-65,11.DOI:10.16742/j.zgcdxb.20240289
新疆北部荒漠不同微生境下毛穗旱麦草根鞘形态差异比较
Comparison of Rhizosheath Morphology in Eremopyrum distans accross Different Desert Habitats in Northern Xinjiang
摘要
Abstract
This study focused on the annual ephemeral plant,Eremopyrum distans,in the Gurbantung-gut Desert of northern Xinjiang.Root system and rhizosheath characteristics of Eremopyrum distans in sandy and gravelly microhabitats were analyzed to reveal the role of the physical and chemical properties of both the rhizosheath soil and the rhizosphere soil in rhizosheath formation.The results indicated that Eremopyrum distans in the sandy microhabitat enhanced water and nutrient absorption by developing root hairs,whereas in the gravelly microhabitat,contact with soil was increased by enlarging the root surface area,volume,and branch numbe,thereby improving absorption efficiency.At the heading stage,the sandy microhabitat promoted rhizosheath development,exhibiting higher rhizosheath weight,length,and development indices.In contrast,at the fruiting stage,rhizosheath parameters were significantly higher in the gravelly microhabitat,suggesting the effect of soil particle adhesion on the root system.Correlation analysis revealed that several root characteristics were positively correlated with rhizosheath characteristics in the sandy microhabitat,especially at the heading stage.In the gravelly microhabitat,however,several soil factors had positive correlations with rhizosheath characteristics,in which more factors were positively correlated compared with sandy microhabitat at the heading stage.These findings provide a theoretical framework for understanding the ecological adaptation strategies of ephemeral plants and the conservation of plant resources.关键词
根鞘/根系构型/毛穗旱麦草/一年生短命植物/沙质生境/砾质生境Key words
Rhizosheath/Root system architecture/Eremopyrum distans/Annual ephemeral plant/Sandy habitat/Gravel habitat分类
农业科技引用本文复制引用
张青青,孙瀚博,江康威,王亚菲,丁雨,吕程..新疆北部荒漠不同微生境下毛穗旱麦草根鞘形态差异比较[J].中国草地学报,2025,47(5):55-65,11.基金项目
新疆维吾尔自治区自然科学基金项目(2022D01A189)和国家自然科学基金项目(32260311) （2022D01A189）
