由于冬小麦较春小麦品质好,收获期早,并有利于提高复种指数和防御干热风的危害,所以从本世纪40年代以来,许多气象和农学工作者对我国冬小麦种植北界进行了较广泛地探讨。影响冬小麦种植北界的主导因素是小麦越冬期的温度条件,其次是积雪或水分条件。卢 Since winter wheat has better quality and harvested earlier than spring wheat, and is conducive to raising the index of multiple cropping and the protection against dry and hot wind, many meteorologists and agronomists have conducted a more extensive discussion on the planting of the northern boundary of winter wheat in our country since the 1940s . The dominant factor affecting winter wheat planting in the northern boundary is the winter wheat overwintering temperature, followed by snow or moisture conditions. Lu