胡杨(Populus euphratica Oliv.)根繁殖特征  

Root propagation characteristics of Populus euphratica Oliv

作　　者：王永斌[1] 努尔巴依.阿布都沙力克 Niels Thevs 

机构地区：[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,greifswald17489

出　　处：《生态学杂志》2007年第12期1937-1941,共5页Chinese Journal of Ecology

基　　金：国家重点基础研究发展规划项目(G1999043508);中德合作资助项目(I/78636)

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。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.

关 键 词：胡杨 克隆生长 觅食行为 风险分摊 

分 类 号：S792.11[农业科学—林木遗传育种]