【摘要】 对杂交粳稻甬优8号进行不同播期、基本苗、施氮量和水分4因素3水平的正交试验,筛选其最佳栽培因子组合。结果表明:播期(x)对其全生育期(y)影响显著(F=82.71>F0.05),呈显著负相关,y=-0.4x+149.67,(R=0.997 4);基本苗对有效穗影响显著(F=52.74>F0.05),随着基本苗的增加有效穗呈递增趋势,结实率和千粒重呈下降趋势;播期和施氮量对产量影响极显著,密度对产量影响显著,甬优8号最佳栽培组合为播期(5月5日)、密度(5.46万/667 m2)、施氮量(20 kg/667 m2)和水分(表层无明水)。更多还原

【Abstract】 In order to select the optimum cultivation combination,we conducted orthogonal experiments to hybrid japonica rice Yongyou8 from different sowing date,basic seeding,nitrogen application rate and water. The results showed that the whole growth duration( y) was significantly influenced by sowing date( x)( F = 82. 71 > F0. 05),which had significant negative correlation( y =- 0. 4x +149. 67( R = 0. 9 986*)). Effective panicles were significantly influenced by basic seeding( F = 52. 74 > F0. 05. There was positive correlation between basic seeding and effective panicles,but negative correlation between grain filling and 1 000- grain weight. Both seeding date and nitrogen fertilization had remarkable influence on the yield of Yongyou 8. Meanwhile,planting density had greater effect on the yield. The study suggested that the optimum cultivation combination of Yongyou 8 was that sowing date was May 5 and planting densities were 5. 46 × 103/667 m2. And then nitrogen application rate was 20 kg /667 m2 with suitable water on soil surface.更多还原