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在自然光照和人工遮荫的弱光条件下研究了生长调节剂ＤＰＣ（缩节胺）和营养物质ＫＨ２ＰＯ４单独和混合浸种处理对棉苗下胚轴形态和组织解剖结构的影响，结果表明，在弱光下棉苗的下胚轴生长发育差、结构较差，在两种光照条件下，ＤＰＣ、ＫＨ２ＰＯ４、ＤＰＣ＋ＫＨ２ＰＯ４对棉苗下胚轴的形态和结构都有不同程度的影响，其中以ＤＰＣ＋ＫＨ２ＰＯ４处理效果优于单独使用，特别是在弱光下此效应更明显。ＤＰＣ＋ＫＨ２ＰＯ４处理使棉苗下胚轴缩短、变粗，其维管组织发育好，维管束中的导管数目增多；木质部、韧皮部面积大且发育好，从而改善下胚轴的结构。为茎的组织结构和生理功能的改善奠定了基础，有利于培育壮苗。
The effects of growth regulator DPC and KH2PO4 on seedling hypocotyls morphology and tissue anatomy were studied under natural light and artificial shading under low light conditions. The results showed that under Under low light, the hypocotyls of cotton seedlings grew poorly and their structures were poor. Under the two illumination conditions, the morphology and structure of hypocotyls of cotton seedlings were affected by DPC, KH2PO4 and DPC + KH2PO4, respectively. Among them, DPC + KH2PO4 The effect is better than alone, especially in low light, the effect is more obvious. The hypocotyls of cotton seedlings were shortened and thickened with DPC + KH2PO4 treatment, the vascular tissues developed well and the number of catheters in vascular bundles increased. The xylem and phloem were large in area and developed well, thus improving the hypocotyl structure. The organization of the stem for the improvement of physiological functions and laid the foundation conducive to nurturing strong seedlings.