传统的棉花栽培技术强调适期早播，一般以地表下５ｃｍ处地温稳定通过１４℃的日期为始播期，目的是延长有效花铃期来提高产量。近年海涂棉花采用“矮、密、早、调”栽培技术，要求集中结铃、集中采摘、高产稳产高效。为此１９９７年我们进行了播期试验，以便完善该栽培技... Traditional cotton cultivation techniques emphasize early sowing, generally 5cm below the surface temperature through the 14 ℃ date for the initial sowing date, the purpose is to extend the effective flowering period to increase production. In recent years, the coastal cotton uses the “short, dense, early and tune” cultivation techniques, requiring centralized end bell, focus on picking, high and stable production and high efficiency. To this end we conducted a sowing date in 1997 in order to improve the cultivation techniques ...