中文摘要：

本文对人工栽培的4种植物根系以0.5mm为1个径级进行分级,计算每个径级组的累计根数、累计根长、累计根表面积和累计根干重。结果表明:沙地柏(Sabina valgarisAnt.)、柠条(Caragana microphyllaLam.)和沙柳(Salixpsammophila)的根系的分枝能力比白沙蒿(Artemisia sphaerocephalaKrasch)强;沙地柏和柠条主要是以细根分布为主,0 mm~0.5mm、0.5 mm~1mm、1mm~1.5mm的径级组为代表根,累计根数、累计根长、累计根表面积和累计干重各个指标所占的百分比和都在33%以上;沙柳和白沙蒿0.5 mm~1mm、1 mm~1.5mm、1.5mm~2mm的径级组为代表根,沙柳各个指标所占的百分比之和在34%以上;白沙蒿各个指标除累计干重之和外,所占的百分比之和在25%以上。

英文摘要：

In this paper,the roots of four cultivated plants were divided by the diameter range of 0.5 millimeter and calculated the accumulation quantity,length,surface area and dry weight of each diameter class.The results showed: each of the root branch of Sabina valgaris Ant.,Caragana microphylla Lam.and Salix psammophila was more than that of Artemisia sphaerocephala Krasch.The fine roots was main roots of the Sabina vulgaris Ant.and Caragana microphylla Lam.and the diameters range of represented roots were 0mm-0...