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两优培九穗型大 ,结实率相对较低 ,亩产 6 50kg指标的亩穗数宜在 16 .0～ 16 .5万 ,每穗总粒数掌握在 190粒左右 ,有利于灌浆物质的充实和结实率的提高。优化栽培技术主要有 :适期早播早栽 ,4月底至 5月 5日播种 ,可在 10月 5日左右成熟 ;通过培育单株带蘖 3.5～ 4个的壮秧 ,亩栽 2万穴、7～ 8万基本茎蘖苗 ,从而保证足穗 ;合理用肥 ,亩施纯氮 17.5kg左右 ,增施磷、钾肥 ,前、后期氮肥配比为 7∶3;水浆管理上强调比汕优 6 3早 2个叶龄即 10叶期开始搁田 ,以控制高峰苗 ,提高成穗率。不能与汕优 6 3同时断水 ,掌握在成熟前 5～ 6d断水 ,提高结实率和千粒重 ;切实抓好稻曲病、粒黑粉病和三代三化螟等病虫的防治工作
Liangyoupeijiu large panicle, seed setting rate is relatively low, per mu yield index of 6 50kg acres should be 16.0 ~ 16.5 million, the total number of grains per spike at about 190, is conducive to the enrichment and fruiting of the filling material Rate increase. Optimized cultivation techniques are: early sowing early planting appropriate, from the end of April to May 5 sowing, mature around October 5; by cultivating a plant with tillers 3.5 to 4 strong seedlings planted 20,000 acres , 7 to 80,000 basic stems and tillers, so as to ensure the foot; rational use of fertilizer, Mushi Shi 17.5kg of pure nitrogen, increased phosphorus and potassium, before and after the ratio of 7: 3 nitrogen fertilizer; water slurry management stress ratio Shanyou 6 3 as early as 2 leaf age 10 leaf stage began to Tian, to control the peak seedlings, to increase the rate of ear into. Can not cut off water with Shanyou 6 3 at the same time, grasp the water cut off 5 to 6 days before maturity, increase the seed setting rate and 1000-grain weight; effectively control the prevention and control of rice germ, grain powdery mildew and three generations of striped borer