杂交水稻Ⅱ优航1号产量构成因素分析与高产栽培技术研究

运用二次回归旋转组合设计，对Ⅱ优航1号进行秧苗4叶期喷施多效唑浓度、移栽期、插植密度、施N量、施K量5项农艺措施进行研究。对Ⅱ优航1号的产量构成因素进行分析，明确了各因素对产量的影响和各因素相互之间的关系。结果表明，穗数对产量作用最大，每穗粒数、结实率对产量的影响程度较低。建立产量与5项农艺措施的回归模型。分析了农艺措施对产量的影响。结果表明，对产量的影响主要是多效唑浓度、移栽期、密度、施N量。并经微机模拟，其高产栽培[措施是：多效唑浓度为718.7~783.1mg/kg,移栽期为7月10—12日，每公顷插25.52~26.78万丛，施纯N 166.8~176.5kg、K2O 122.4~134.1kg。

Analysis of Yield Components and Study on the Culture Techniques of High Yield for the Hybrid Rice- Ⅱ youhang 1

The effects of the factors(panicle number per hectare, spikelet number and seed setting percentage)on yield and the interaction among these factors have been defined through analyzing the yield of youhang 1.The analysis result show that the effect of panicle number per hectare on the yleld of youhang 1 is the greatest; spikelet number and seed setting percentage doesn't have much effect on the yield of youhang 1.A culture techniques for the hybrid rice youhang 1 was studied by the method of quadratic regression rotation design. Five influential elements for the culture techniques were density of pp333(x1) ,planting stage(x2),planting density(x3),quantities of nitrogen(x4) and potassium(x5).The regression models of five elements with yield were established. Results showed that main agronomic practices for yield were density of pp333, planting stage,planting density and nitrogen amount. After simulated screening and optimal selection by computer,the high yield cuture techniques were 718.7~783.1 mg/kg pp333, transplanting on July10~12,as 255200~267800 hills per hm2 , 166.8~176.5 kg N per hm2 and 122.5~134.1 kg K2O per hm2.