心叶驼绒藜根系的研究

A Study on root system of Ceratoides ewersmanniana

以新疆地区天然心叶驼绒藜为研究材料，选取不同龄级的标准植株，采用全根挖掘法和烘干法，分析了心叶驼绒藜根系形态特征与生长状况。结果表明，心叶驼绒藜主根系发达，主根长为株高的2．0～11．7倍；随着龄数增长，根系呈现哑铃状分布的特点，侧根系主要分布在0～50cm土层；2月龄植株主根生长速度最快，达12．9mm／d;心叶驼绒藜土壤水分稳定层为60～320cm，该层土壤含水量为6．81％～9．05％。多年生植株在0～50cm土层内，主根直径由14．6mm减小为4．0mm，变化幅度大。

The root morphological characters and growing conditions of Ceratoides ewersmanniana were analysed through selecting the natural C. ewersmanniana grown in Xinjiang autonomous region as the material, choosing the entire plants with different age-classes, and using the full root-excavation and oven drying methods. The results show that the taproots developed well and the plant height was up to 2-11.7 times of the taproot length. Along with the increasing of age,the root system distributed like a dumbbell shape. The lateral root system mainly spread in 0-30 cm depth of the soil layer. For the 2 month-old plants,the growth speed of taproots started full out and achieved 129 mm/d. The soil stable moisture layer was between 60-320 cm,where the soil moisture content was around 6.81-9.05%. In the soil layer of 0-50 cm,the diameter of main root for perennial plants decreased rapidly from 14.6 mm to 4.0 mm.