摘要： 采取盆栽与大田试验相结合的方法，研究了潮土与砂姜黑土两种土壤类型玉米根系生长发育的动态变化。结果表明：潮土玉米根系在前期生长发育较好，长度、干重及活力较高，后期衰减时间较早，但幅度较小，根系主要集中分布于0~20cm土层，下扎较浅，深层根量较少；砂姜黑土玉米根系在中后期生长发育较好，且根系长度、干重及活力增降幅度较大，整个根系在土壤中分布较均，下扎较深，深层根量较多。

关键词: 潮土, 砂姜黑土, 玉米根系, 生长发育

Abstract: With the field and pot experiments, the dynamic growth of maize roots was studied in the damp soil and shajiang black soil, and the result showed that in damp soil, roots of maize grew better than other stages in the length, dry weight and activity of roots, and the senescence time of roots was earler in the later period of development. Most of the roots of the maize plant was distributed in the top layer of the soil (0~20 cm), whereas only a smaller proportion of them could reach the deeper layers. In shajiang black soil, the whole roots had good root characteristics in the middle-later period of development, but the length, dry weight and activity of roots changes more intensity. The whole roots were well-distributed in the different soil layers, and there were many roots in deeper soil.

Key words: Damp soil, Shajiang black soil, Maize root system, Growth and development