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鉴于“汕优6号”为我地区目前晚造的主要当家品种,研究影响该种齐穗期以及穗粒重的诸因素有其重要意义。本试验采用四元二次回归正交旋转组合设计,从不同播期、插期、秧苗带蘖数及中期追施氮肥等4个方面各5个水平着手探讨和建立适宜的数学模型,以供生产参考。“汕优6号”种子由连南县农科所提供,1982年6月15日开始播种,7天播1期,7月13日播完,共播5期。本田微型小区,每区30科,双行区,规格7×4寸,单株植,共36个
In view of the “Shanyou 6” is the main late-making varieties in our region, it is of great significance to study the factors affecting the heading date and grain weight. In this study, quaternary quadratic regression orthogonal rotation combination design was used to explore and establish suitable mathematical models from four aspects including different sowing dates, interplanting dates, tiller number of seedlings and topdressing nitrogen fertilizer in the middle period for Production reference. “Shanyou 6” seeds provided by Liannan County Agricultural Sciences, June 15, 1982 began sowing, sowing 7 days, July 13 sowing, a total of 5 broadcast. Honda micro-district, 30 families, two-line area, size 7 × 4 inch, single plant, a total of 36