摘要
柠条是黄土丘陵地区造林的主要灌木树种,其根系属轴根型分孽类型。根系较发达,2—4年生根深1.5—4米,根幅1—3米。根量主要分布在50厘米深的土层内,随年龄增长由柱状分布逐渐变为锥状分布。柠条根系的可塑性较大,在不同立地条件下,生长发育的情况差异较明显。这主要决定于土壤结构、肥力和水分状况,整地方式和质量也有直接的影响。柠条根系与地上部分的生长有一定的相关性,2—4年生柠条根长为株高的5—6倍,根重与株重比随生长年限的增长而降低。
Caragana microphglla is a stable shrub species for afforestation in thesemiarid loess hilly region. Its root system belongs to the tillering ca-tegory of taproot type and is relatively developed. The biennial-tetren-nial plant root system ranges from 1.5 to 4.0m deep and from 1.0 to 3.0wide. Most of the roots are distributed in the depth of less than 50cmsoil layer, and the distribution form changes gradually from column tocone-shaped as time goes on. The root system of C. microphylla has quite good plasticity and dif-fers evidently in growth under different locality that depends mainly onsoil structure, fertility and moisture. The way and quality of soil pre-paration exerts great influence on the growth of root system. There is certain correlation in growth between root system and thepart on ground of the plant. The length of biennial-tetrennial plant rootis about 5-6 times of plant height. The weight ratio of C. microphyllaroots to the part on the ground decreases with the increases of its age.
出处
《水土保持通报》
CSCD
北大核心
1989年第3期45-49,共5页
Bulletin of Soil and Water Conservation
