秋播小麦播种期对小麦的产量影响很大,选择适宜播种期是一项重要增产措施。确定适宜播种期大致有以下几种方法。一、积温法在小麦有越冬期的北方麦区,根据小麦冬前生育要求有一定茎数和壮苗的标准,大致需要0℃以上的积温500—600℃为指标,再根据气温0℃出现的日期反推算出适宜播种期。目前这种方法运用逐渐多起来。二、温度法根据小麦分蘖要求的适宜温度14—6℃为指标,再根据当地气候资料找出14—6℃出现时期,将分蘖期安排在上述温度出现的时期内,再确定适宜播种期。如北京气温14℃多年平均终现日期在10月10日,6℃的终现日期在11月10日,在一般情 Autumn sowing of wheat sowing period has a great impact on the yield of wheat, select the appropriate sowing period is an important stimulation. The appropriate sowing date to determine the following methods. First, the cumulative temperature method Wheat overwintering northern wheat area, according to the requirement of winter wheat before birth have a certain number of stalks and strong seedlings, generally need more than 0 ℃ accumulated temperature 500-600 ℃ as an indicator, then according to the temperature 0 ℃ The date back to calculate the appropriate sowing date. The current use of this method gradually increased. Second, the temperature method according to wheat tiller requirements of the appropriate temperature 14-6 ℃ as an indicator, and then find out the date of 14-6 ℃ according to the local climate data, the tillering stage arranged in the above temperature appears period, and then determine the appropriate sowing period. Such as Beijing temperature 14 ℃ average final date of many years on October 10, the final date of 6 ℃ on November 10, in the general situation