【摘 要】
：
考察了不同栽培密度和播期对广两优272产量形成的影响,结果表明,广两优272栽培密度为22.8万穴/hm2、播期在4月15日时产量最高.随着广两优272栽培密度增大,茎蘖数峰值增加而无
【机 构】
：
粮食作物种质创新与遗传改良湖北省重点实验室/湖北省农业科学院粮食作物研究所,浠水县农业技术推广中心
论文部分内容阅读
考察了不同栽培密度和播期对广两优272产量形成的影响,结果表明,广两优272栽培密度为22.8万穴/hm2、播期在4月15日时产量最高.随着广两优272栽培密度增大,茎蘖数峰值增加而无效分蘖增多,有效穗数增多而穗实粒数减少;播期推迟,该品种分蘖峰值滞后,无效分蘖增多而穗实粒数减少.栽培密度、播期两者均与产量呈抛物线关系,在栽培密度25.8万穴/hm2时,广两优272产量最高可达9 611.7kg/hm2;4月25日后播种,广两优272产量显著降低,提前播种产量略有增加.广两优272作为一种高产迟熟中稻品种,在湖北省种植适宜播期为4月中旬或略提前,栽培密度应保持25.8万穴/hm2左右.
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