播种期适当与否直接关系着小麦整个生长发育过程和对外界不良环境的抵抗能力的强弱,从而影响产量的高低。过早播种在秋季温度高,湿度大的情况下,往往过份的繁茂生长,过早的消耗养分,对抵抗冬春低温与霜冻能力减低,降低产量;而过迟播种由于冬前生长短促,不能很好的分蘗和扎根,秋季锻炼程度差,对不良外界环境抵抗力极弱,因此产量不高,这种过早过晚播种降低产量的根本原因, Appropriate sowing period is directly related to the wheat growth and development process and the external environment of the resistance ability, thus affecting the level of output. Premature sowing in the autumn under the conditions of high temperature and humidity, often excessive growth, premature consumption of nutrients, resistance to cold and frost in winter and spring ability to reduce and reduce production; late sowing due to short growth before winter, Not good tillering and rooting, autumn exercise is poor, very poor resistance to the adverse external environment, so the yield is not high, this too early sowing to reduce the root causes of yield,