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Study on the relationship between yield and yield components in rice at cold region
Author(s): 
Pages: 33-35
Year: Issue:  6
Journal: Reclaiming and Rice Cultivation

Keyword:  灰色关联度 相关性 逐步回归 产量构成四要素;
Abstract: 通过对影响水稻产量性状的灰色关联度、相关性及逐步回归分析,结果表明:产量构成四要素对产量的贡献依次为穗粒数>穗数/㎡>千粒重>结实率;穗粒数与实际产量之间有正相关性,其它与产量呈较弱的负相关性;产量构成因素与产量的多元逐步回归模型为■:=283.6605+0.4863X1+2.6405X2+0.6511X3+1.4269X4,回归方程中穗粒数偏回归系数最大。因此,在制定水稻高产栽培措施时,应在稳定平方米穗数的基础上,提高穗粒数,是获得高产主要途径之一。栽培上采取的措施是倒4叶后半叶酌情施N肥和倒2叶采用间歇灌溉。
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