种、菜套作高产高效栽培技术毕可承戚其发李雪英周守平彭守华尉继强（山东省农业科学院威海分院２６４２００）目前，在玉米种子生产领域，产量低、效益差仍是制约种子生产发展的重要因素。据统计，肥水条件较好的纯春播地块，玉米制种亩产一般在２００～２５０ｋｇ左右... At present, in the field of corn seed production, low yield and poor efficiency are still the important factors restricting the development of seed production. According to statistics, pure spring water and fertilizer conditions better plots, corn seed production per mu is generally about 200 ~ 250kg ...