在棉花的高产栽培中,花期的田管是十分重要的。准确的看苗诊断是及时采取相应的控、促措施的保证。笔者认为,棉花花期的看苗诊断之关键是解决下列两个问题:①如何诊断进入初花期的棉株素质,②如何通过花期的诊断来确定花铃肥的最佳施用期。笔者经过多年的实地观察,提出以“相对花位”为单一的定量指标,来解决上述两个问题,在生产实践上,已得到初步的验证,效果较好。一、“相对花位”的概念相对花位即调查时最上一朵花的花位与最上一个蕾的蕾位之比值 In high-yielding cotton cultivation, flowering tube is very important. Accurate diagnosis of seedlings is promptly take the appropriate control, and promote measures to ensure that. The author believes that the key to cotton seedling flower diagnosis is to solve the following two problems: ① How to diagnose the quality of cotton plants entering the early flowering stage; ② How to determine the best application period of flower boll fertilizer by flowering diagnosis? After many years of field observation, the author puts forward a quantitative index that is based on “relative flower position” to solve the above two problems. In production practice, the author has obtained preliminary verification and achieved good results. First, the concept of “relative flower” The relative flower is the ratio of the flower position of the uppermost flower to the position of the uppermost flower bud