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选用５种不同冬春性类型的１１个推广品种在山东省４个生态类型区分期播种，研究不同类型品种在不同生态区的穗分化进程，结果表明．在相同生态类型区，春性偏冬性品种的穗分化进程最快，冬性品种的穗分化进程最慢；在不同生态类型区，鲁西南平原湖洼区的穗分化进程最快，胶东丘陵区的穗分化进程最慢。文中讨论了与小麦穗分化有关的安全播种期问题。并就生产上的肥水措施提出了建议。
Eleven popularized varieties with five different winter-spring types were selected and sown in four ecotypes in Shandong Province to study the spike differentiation process of different types of cultivars in different ecotopes. In the same ecotype area, the spike differentiation process was the fastest in winter and the spike differentiation process was the slowest in winter. The spike differentiation process was the fastest in the hilly areas of the southwestern plains in different ecological types, District spike differentiation process is the slowest. The paper discusses the issue of safe seeding period related to spike differentiation of wheat. And put forward suggestions on measures of fertilizer and water production.