栽植密度和施肥量对长龄秧迟栽油茬杂交稻生长和产量的影响

以杂交稻F优498为材料设计田间试验,研究了4种栽植密度和3种施肥量处理长龄秧迟栽油茬杂交稻的生长和产量状况。其结果是：栽植密度由10.50万穴/hm ²增加至18.00万和21.75万穴/hm ²,施肥量比当地实际施肥量降低12.5%~25.0%,仍可获得同低密度与高肥处理组合相当的茎蘖数量、经济性状和产量水平。表明在现有人工栽插水稻密度普遍偏低的情况下,适当增大栽植密度,有利于减少肥料施用并获得较高产量水平。

Effects of Planting Density and Fertilization on Growth and Yield of Hybrid Rice under Longer Seedling-Age and Late-Transplantation after Rapeseed

Using hybrid rice F-you 498 as material, by designing a field experiment of 4 transplantation densities and 3 fertilization quantity, the growth and yield of hybrid rice under longer seedling-age and late-transplantation after rapeseed was studied. The result showed that there were the same tiller number, economic traits and yield when the density increased from 105 000 holes/hm ² to 180 000 holes/hm ² or 217 500 holes/hm ², and the fertilization quantity decreased from 12.5% to 25.0%. It showed that the increase of planting density properly could benefit for decreasing fertilizer application and getting higher production under the situation of lower artificial planting density.