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运用三元一次回归正交设计研究纯度（８６％ ～９６％ ）、栽播密度［（１～２）万窝／６６７ｍ ２］和每窝栽插谷粒秧数［（１～３）粒／窝］等因素对菲优多系１ 号产量的影响，结果表明，各因素对产量的影响未达５％ 差异水平，其影响大小顺序为：纯度＞ 栽插密度＞ 大田栽插密度与每窝谷粒秧数互作＞ 每窝谷粒秧数＞ 纯度与大田栽插密度互作＞ 纯度与每窝谷粒秧数互作
The results of orthogonal design of a ternary regression were used to study the purity (86% ~ 96%), the planting density [(1 ~ 2) 000 / 667m 2] The results showed that the effect of each factor on the yield did not reach the level of 5% difference, and the order of the effect was: purity> planting density> field planting density and litter size Interaction of grain seedling number> Seedling number per grain> Interaction of purity and planting density> Interaction with seedling number per grain