１９９１～１９９３ 年利用３ 年时间对玉米生产田施用新型肥料———包裹型长效复合肥的用量和施肥技术进行了研究。结果表明：包裹型玉米长效复合肥（ 氮、磷、钾复合一体） 是替代二铵的一种新型肥料；经多年多点联合试验，明确了玉米生产田施用包复肥宜作底（ 口） 肥，不宜作追肥和一次性施肥；每公顷施用包复肥２５０～３００ ｋｇ 为宜；较常规施肥（ 二铵２００ ｋｇ／ｈｍ２） 产量提高１１－６％～１３ ％ ，增加收入５２７～５３２ 元 From 1991 to 1993, the amount of fertilizing technology and application of a new type of fertilizer - corn co-long-acting compound fertilizer - on maize fields was studied over three years. The results showed that the long-term compound corn (W, P, K) was a new type of fertilizer to replace diammonium. After many years of combined experiments, ) Fertilizer should not be used for topdressing and one-time fertilization; applying compound fertilizer of 250-300 kg per hectare is suitable; the yield of conventional fertilization (diammonium 200 kg / hm2) is increased by 11-6% -13% and the income is increased by 527-532 yuan