免耕播种是保护性耕作的关键技术,因为播种质量是直接影响到作物产量形成的最基础因子。保护性耕作必须用免耕播种机播种,因为免耕播种作业是在地表有覆盖物、表土层内有作物根且比较坚硬的情况下进行的,化肥不能像传统耕作那样撒在地表再翻耕下去,而需要在播种的同时集中施入土壤,要求施肥量大、施得深,这样普通的播种机是不能满足要求的,免耕播种机的各工作部件都坚固。它能完成在特殊条件下的播种作业,因此在作业前应 No-till sowing is the key technique of conservation tillage, because sowing quality is the most basic factor that directly affects crop yield formation. Conservation tillage must be sown with a no-tillage seeder, as no-tillage sowing is carried out with cover on the surface, crop roots in the topsoil and relatively hard, and fertilizer can not be planted on the surface as in conventional tillage Go down, and need to be concentrated at the same time sowing into the soil, requires a large amount of fertilizer, applied deep, so that ordinary seeder can not meet the requirements, no-tillage planter of the working parts are solid. It can finish sowing under special conditions, so it should be done before work