采用盆栽种植方式,在避雨棚内对苗期棉株进行淹水,研究不同淹水程度下棉花形态、产物及生理变化。结果表明,淹水后棉花产量、单株成铃率、单铃重、株高、叶片数、单株干物质积累量均减少,而衣分没有变化;随着淹水时间的增加,各指标将进一步降低,淹水20天后,叶片SPAD值急剧下降,皮棉产量减少了80%以上,基本绝收。综合分析表明,淹水15天可以认为是棉花苗期适应涝害胁迫的临界时间,在此之前棉花可以通过栽培技术措施进 Using potted planting method, cotton seedlings were flooded in the shelter to study the morphological, physiological and physiological changes of cotton under different waterlogging levels. The results showed that after flooding, cotton yield, boll yield per plant, single boll weight, plant height, leaf number and dry matter accumulation per plant all decreased, while no change in litter content. With the increase of flooding time, Will further reduce, 20 days after flooding, leaf SPAD value dropped sharply, lint yield reduced by more than 80%, the basic income. Comprehensive analysis showed that 15 days flooding can be considered as cotton seedling stage to adapt to the critical time of waterlogging stress, before cotton can be cultivated through technological measures