春小麦的不同播期对产量影响很大。在雁北地区气象局的协助下,1976-1981年我们连续进行了春小麦分期播种试验。一、试验方法单因素分期播种试验。供试品种为墨西哥沙瑞克小麦。前三年设7个播期:3月5日至4月16日,7天一个播期,共42天。亩播量30斤,小区面积均为2厘;后两年切头去尾,从3月15日至4月9日,26天,5天一个播期。二、试验结果 Different sowing dates of spring wheat have a great impact on the yield. With the assistance of the Bureau of Meteorology in Yanbei, 1976-1981 we conducted a series of seeding trials of spring wheat in succession. First, the test method Single-factor sowing test. The tested varieties were Mexican Sharick wheat. The first three years set seven sowing dates: March 5 to April 16, 7 days a sowing date, a total of 42 days. Acre sowing 30 pounds, the plot area is 2%; after two years, cut to the tail, from March 15 to April 9, 26 days, 5 days a sowing date. Second, the test results