摘要
以鄂尔多斯高原3种人工栽植4龄-5龄柠条、沙地柏和沙柳为研究对象,对其径级主要分布(0mm^3mm)的根系进行单根拉伸实验,结果表明:3种灌木极限抗拉力与直径均呈幂函数关系;沙柳和柠条的极限应变随直径的增大而增大,并成对数关系,沙地柏的极限应变与直径成单峰曲线关系,即极限应变随着直径的增大而增大,当直径增大到1.5mm左右的时候,极限应变开始减小;3种灌木细(0.4mm^0.6mm)、中(0.9mm^1.2mm)和粗(1.9mm^2.4mm)3种径级根系在不同土壤含水量下抗拉力和极限应变变化有明显差异。
The limit pull-resistance of root of 4-5 years Caragana microphylla、Sabina vulgaris and Salix psammophila in Ordos Plateau have been tested,The result show that root diameter and pull-resistance function idempotency equation have been founded;Salix psammophila and Caragana microphylla limit strain increase along with diameter enlarged,It was found that Sabina vulgaris exist a logarithm relations between limit strain and diameter,Sabina vulgaris limit strain and root diameter have one-kurtosis curve variety....
出处
《内蒙古农业大学学报（自然科学版）》
CAS
2008年第3期86-89,共4页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
内蒙古水利厅计划项目
国家基金项目(9061008)
关键词
径级
极限拉力
极限应变
土壤含水量
Diameter-class
limit pull-resistance
limit strain
soil containing water or moisture
