小麦与秋作物接茬紧,成熟期与农村季节的矛盾是生产上长期存在的问题。近几年随着水肥条件的改善和氮肥使用量的增加,小麦和秋作物成熟期延迟,有相当比例的麦田,形成了晚熟晚播的恶性循环。例如,邢台地区宁晋县小麦种植面积约65万亩,由于大秋作物腾茬晚,1982年十月十日以前仅播种31.5万亩,不到种麦任务的50%,十月十 The tight connection between wheat and autumn crops and the conflict between the mature period and the rural season are long-standing problems in production. In recent years, with the improvement of water and fertilizer conditions and the increased use of nitrogen fertilizer, the maturity of wheat and autumn crops is delayed, and a considerable proportion of wheat fields are formed, forming a vicious cycle of late sowing late sowing. For example, the planting area of ​​wheat in Ningjin County in Xingtai Region is about 65 million mu. Since the crop of T’u-Ch’u-t’u was stubble late, only 315,000 mu was sown before October 10, 1982, less than 50% of the task of planting wheat and October 10