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胡杨(Populus euphratica Oliv.)根繁殖特征

王永斌1;努尔巴依·阿布都沙力克1;Niels Thevs2   

  1. 1新疆大学资源环境科学学院 新疆维吾尔自治区绿洲生态重点实验室 干旱半干旱区可持续发展国际研究中心, 乌鲁木齐 830046; 2德国Greifswald大学植物学院, Greifswald 17489
  • 收稿日期:2007-02-01 修回日期:1900-01-01 出版日期:2007-12-10 发布日期:2007-12-10

Root propagation characteristics of Populus euphratica Oliv.

WANG Yong-bin1; Nurbay Abdusalih1; Niels Thevs2   

  1. 1Xinjiang Key Laboratory of Oasis Ecology & International Center for Desert Affairs Research for Sustainable Development in Semi-Arid and Arid Land, College of Resources and Environment Science, Xinjiang University, Urumqi 830046, China;2College of Botany, University of Greifswald, D-17489 Greifswald, Germany
  • Received:2007-02-01 Revised:1900-01-01 Online:2007-12-10 Published:2007-12-10

摘要: 以新疆塔里木河中游河岸北部河漫滩的胡杨幼林带为对象,从克隆生态学的角度,采用挖掘法、高压冲洗法及断根胁迫实验,研究了胡杨在资源异质环境中的风险分担、资源觅食与保持功能以及根源性克隆生长形态特征。结果表明:胡杨的地下根分枝类型为单轴型,同一生长方向2水平根的夹角平均约为180°,水平根与垂直根的夹角为90°~100°,水平根和垂直根的空间构型近似T形; 基株的胚根周长>分株的次根周长; 水平根呈侧圆台形,胡杨的2水平根之间存在着养分的传递。

关键词: 小麦, N利用效率, 基因型差异, 环境效应, 评价指标

Abstract: Taking young Populus euphratica forest at the northern floodplain in middle reaches of Tarim River as test object, and by the methods of excavation, high pressure washing and root-cutting, this paper studied the abilities of P. euphratica in sharing risks and in foraging and storing basic resources under heterogeneous resources environment, and the cloning characteristics of its root propagation from the viewpoint of cloning ecology. The results showed that the offshoot root of P. euphratica was uniaxial. The angle between two horizontal roots in the same growth direction was 180° on average, while that between vertical root and horizontal root was about 90°-100°, forming a T-shaped spatial structure. The mean perimeter of genets was longer than that of ramets, and the horizontal roots were frustum-shaped. There existed substance transfer between two horizontal roots of P. euphratica.

Key words: Wheat, Nitrogen use efficiency (NUE), Genotypic variation, Environmental effect, Evaluation index