旱地小麦的播种期对出苗、分蘖、各种器官的建成及产量的构成等至关重要。掌握得当,就可充分发挥良种和栽培技术的增产作用,获得较高产量。掌握不当,就会事与愿违,一切增产措施将大为减色。因此,认真总结旱地小麦播种期对产量影响的经验教训,对指导旱地小麦生产有重要意义。一、旱地小麦的生育特点旱地小麦因无浇水条件,栽培条件差,一般麦苗生长偏弱。冬春干旱,土壤表墒常不足,次生根发生的迟,入土较浅。初生根(种子根)发生较早,入土较深,冬前入 The sowing date of dryland wheat is crucial for emergence, tillering, the establishment of various organs and the composition of yield. Mastered properly, we can give full play to the improved production of seed and cultivation techniques, access to higher yields. Improper grasp, things will be contrary to expectations, all production measures will greatly reduce color. Therefore, earnestly summarizing the experiences and lessons of the impact of sowing date on the yield of dry land wheat is of great significance to guide the wheat production in dry land. First, the characteristics of dry land wheat Fertility Dryland wheat because of no watering conditions, poor cultivation conditions, the general weak growth of wheat seedlings. Winter and spring droughts, soil often lack of table moisture, secondary roots occur later, into the soil shallow. Primary root (seed root) occurred earlier, deeper soil, into the winter before