紫穗槐幼苗在不同干旱胁迫下生长特性的研究

Growth Characteristics of Amorpha fruiticosa Seedlings under Drought Stress

干旱对紫穗槐幼苗的茎高、地径、叶片外部形态、生长状态等生态指标的影响的结果表明:干旱胁迫对植株的生长有明显的抑制作用。随着干旱胁迫时间的延长、胁迫强度的加剧,其株高和地径减小,复叶叶柄总长度、小叶数量,叶面积也逐渐减小;在长时间干旱胁迫下紫穗槐采用脱落下部枝叶的方式,确保个体生存以增强抗旱性。

The effects of drought stress on the seedlings height and the stem basal diameter and external morphology of leaflet and character of water stress of Amorphafruiticosa under long - terra water controlled stress were studied. The results showed that drought stress had definite inhibiting effect the seedlings growth. The stem height and the stem basal diameter were all decreased with increasing drought stress; The common petiole length of compound leaf and size quantity, leaf area of leaflet were all decreased with increasing drought stress and extension of time for drought stress. Under long - term drought stress the adaptability to drought stress is also strengthened by increasing the survival of individual by withering away the lower branches and leaves of the individual plant.