一、前言 华中地区的棉花播种时期,由于前作、棉种或栽培方式的不同,各地差异很大;即在这些条件类似的情况下,同一棉区,也有悬殊。一般习惯多以谷雨节(4/21)为准;但早的清明节(4/6)前即行开始,晚的要到立夏(5/6)甚至小满(5/21)方才进行。因此,对于各种条件下的棉花播种适期,尤其是对占本棉区主要地位的麦棉两熟栽培(约占全部棉田面积2/3以上)与日益推广扩大的岱字棉15号良种地区,更需研究其适当播种时期,以供生产实践上的参考依据。 I. INTRODUCTION The cotton planting period in Central China is very different from place to place because of the difference between the pre-planting, cotton planting and cultivation methods. In other words, under the same conditions, there is a disparity in the same cotton area. The common customs are mostly the Valley Rain Festival (4/21), but the early Ching Ming Festival (4/6) begins immediately, the late summer (5/6) and even the full moon (5/21). Therefore, under various conditions for the appropriate period of cotton sowing, especially for cotton occupy the main status of cotton and wheat double cropping (accounting for more than two-thirds of the total area of ​​cotton) and the increasingly widened Dai Zi 15 cotton Areas, but also need to study the appropriate period of sowing, for the production of practical reference.