不同盐水平棉花根系生长与根系形态指标研究
The Effects of the Growth of Cotton Root and Shape Indexes in Different Salinity Levels

通过水培试验研究不同盐水平对棉花根系生长的影响。结果表明在盐胁迫下棉花根系生长受到抑制，根系到达最快生长速度的时间推迟4天，最终影响根系的生长量；胁迫下棉花根系感受到胁迫信号，棉花产生相应的适应反应，首先要保证根系的生长，将更多的碳水化合物分配到根系中，根冠比增加，而且随着盐分的增加，这种趋势更加明显。通径分析结果表明与根系生长有关的形态指标中根长是最主要的指标，对根系生长起直接作用；而表面积、体积、直径是次要的指标。
A pot experiment was carried out to evaluate effects of different salinity levels on growth of cotton root. The results showed that the root growth of cotton was inhibited under salt stress, and the maximum growth rate of cotton root was delayed by 4 days, which ultimately affected the growth of cotton root. Under stress, the root system of cotton sensed the stress signal and the cotton produced the corresponding adaptive response: the first step is to ensure the growth of the root system, it allocates more carbohydrates to the root system, then the root-shoot ratio increases, and this trend becomes more pronounced as salt content increases. The result of path analysis showed that the root length was the major index, which directly affected growth of cotton root, while the surface area, volume and diameter of cotton root were minor indexes.