【摘要】 华安３ 号最适宜的秧龄、密度、纯氮分别是３８ｄ、２２．５ 或１５．０ 万穴／ｈｍ ２、１８７．５ｋｇ／ｈｍ ２。必须施足基面肥，不施促蘖肥，以促苗早发、快发，奠定大穗基础；超前搁田，在每公顷茎蘖苗达１５０ 万时即开始搁田，以稳苗健株，协调群体发展，控制无效分蘖，增加有效积累；合理巧施穗粒肥，养根保叶，活熟到老，提高结实率和千粒重，夺取高产。更多还原

【Abstract】 The most suitable seedling age, planting density and the amount of N fertilizer application for two Line rice combination--Huaan No.3 were respectively 38 days, 225 or 150 thousand hole/hm 2 and 187.5kg/hm 2. The early and fast seed germination ensured the large spike formed through enough basal application and without fertilizer for tillering. The midsummer drainage started when the number of stems and tillerings amounted to 1.5 million/ha, which made the plants strong, infective tillering controlled and effective matter accumulation increased. The high yield was obtained through the top dressing applied cleverly at young ear formation and ripening stage to raise the percentage of seed setting and weight per 1000 grain.更多还原