玉米育苗移栽定向密植高产栽培技术研究开发成本核算及效益评估云南省农科院陈瑞芳，马钧，杨红钧祥云县农牧局杨爱智云南省农科院土肥所“集约化课题组”针对云南高原玉米生产春旱缺糖、群体不足、旱年迟播、成熟不好、产量低而不稳的问题，开展了玉米育苗移栽、定向密植... Maize seedling transplanting directional planting high-yielding cultivation technology research and development cost accounting and benefit assessment Yunnan Academy of Agricultural Sciences Chen Ruifang, Ma Jun, Yang Hongjun Xiangyang County Animal Husbandry Bureau Yang Aizhi Yunnan Academy of Agricultural Sciences, soil and fertilization “Intensive Group” for Yunnan plateau corn Production of spring and drought lack of sugar, lack of groups, late dry sowing, poor maturity, low yield and instability, carried out transplanting corn seedlings, directional planting ...