大白菜的播期研究,国内外有许多报道,各地区也有确定播期的实践经验。提出确定于不同地区、不同品种、不同用途的播期幅度和依据,对增进品质、稳产丰收起到了积极作用。本文根据历年的生产技术考察和生产实践体会认为:仅以生育日数作为适宜播期的主要依据,尚欠妥帖。因为大白菜 Chinese cabbage sowing date, there are many reports at home and abroad, all regions have also confirmed the sowing of practical experience. Proposed to determine the sowing date in different regions, different varieties, different uses and basis, to improve quality, stable yield has played a positive role. This article based on years of experience in production technology inspection and production practice that: only the number of births as the main basis for the appropriate sowing date, is not properly placard. Because of Chinese cabbage