稻板茬直播小麦在淮北地区已开始大面积推广应用,但由于淮北地下水位较低且不稳,秋旱频率较高,表土易板结甚至开裂,在水源不足或灌溉条件差的地区常造成严重减产,生产上因缺少覆盖物,小麦冻害严重。1984年秋我所采用稻草和土杂肥混合覆盖、土杂肥顺播种行覆盖、稻草全层覆盖等办法,均明显减 Direct seeding of rice and stubble wheat has been widely applied in Huaibei area. However, due to the low and unsteady groundwater level in Huaibei, the frequency of autumn droughts is high, and the surface soil is easy to crack or even crack, which often results in serious water shortage or poor irrigation conditions Production cuts due to lack of coverage, wheat serious frost damage. In the autumn of 1984, I used straw and mixed soil to cover mixed fertilizers, soil mixed with sowing and fertilizer to cover, full-thickness straw and other methods were significantly reduced