应用助壮素、缩节胺等植物生长调节剂,对棉花进行化学调控,是近年来我国棉花栽培技术上的一项重大突破。这项技术已成为棉花早熟优质高产的重要措施,但在应用中也存在着不少问题,最突出的是喷施时间晚、次数少、用量过大,使棉花控制过头,造成晚熟减产。根据近年来的试验和大面积的使用经验,在技术上应掌握好以下要领。一、遵照“寓控于调”的原则,变被动使用为主动化调不少人把使用植物生长调节剂简单地看做仅是 Application of mepiquat chloride, acetaminophen and other plant growth regulators, chemical regulation of cotton, cotton cultivation in China in recent years, a major breakthrough in technology. This technology has become an important measure for cotton with good quality and high yield. However, there are still many problems in its application. The most prominent problem is that the spraying time is late, the number of times is too small, and the dosage is too large, which leads cotton to over control, resulting in late maturity and yield reduction. According to recent years of experiments and large-scale experience in the use of technology should have the following essentials. First, in accordance with the principle of “control in tune”, the passive use of the initiative to adjust a lot of people use the plant growth regulator simply as