晚播小麦应变高产栽培技术是在小麦播期推迟的情况下实现小麦高产的栽培技术。一、晚播小麦的生育特点1.冬前苗小、苗弱。小麦从播种至主茎上形成5叶1心的壮苗约需0℃以上积温550℃以上,习惯上把从播种至越冬前的积温低于420℃播种的小麦,称为晚播小麦。10月中上旬播种的小麦,多数年份只有一片叶出土,也称为“一根针”;10月中下旬播种的小麦冬前一般不能出苗,称为“土里捂”。 Late-sowing wheat strain high-yielding cultivation techniques is to achieve high-yielding wheat cultivation techniques in the case of delayed sowing of wheat. First, the characteristics of fertility of late-sown wheat 1. Seedlings before winter, weak seedlings. Wheat from the sowing to the main stem to form a 5 leaf 1 strong heart seedlings need about 0 ℃ above the accumulated temperature of 550 ℃ or more, customary from sowing to wintering before the temperature below 420 ℃ sown wheat, known as late sowing wheat. The wheat planted in the middle of October is only one piece of leaf unearthed in most years, also known as “a needle.” The winter wheat sowing in mid-to-late October generally can not emerge and is called “soil cover”.