水稻不同育苗移栽方式的比较研究

A Comparative Study on Different Planting Patterns of Rice

试验结果表明 ,摆秧的产量高于插秧 ,二者的产量均显著地高于抛秧 ,品种间及品种与栽培方式互作间的差异均不显著。摆秧的增产机理是秧苗素质好 ,移栽植伤很轻 ,分蘖早生快发 ,最高茎蘖数和成穗率均较高 ;叶面积指数高 ,且变化辐度小 ;在抽穗前比叶重增加快 ,此后增加慢 ;在生育后期 ,叶层面积大且占据层次多 ,群体基部绿叶面积大 ,穗层面积大且分布集中 ,位置偏中上 ,SOD含量高 。

The results of the experiment showed that the yield of rice with pot tray-seedling and transplanting was higher than that of pliable tray-seedling and hand-transplanting. The yields of the two patterns were significantly higher than that of pot tray-seedling and scattering-transplanting. The yield differences among three varieties and the interactions between varieties and planting patterns were not significant. The mechanism of grain yield increasing of pot tray-seedling and transplanting rice included the healthy seedlings, light transplanting injury, early and fast tillers, mone and effective tillers, high and stable LAI, fast increased specific leaf weight, the optimum leaf area of the plant population in late growth period, rationally distributed leaves and panicles of the plants in the canopy, high level SOD content of the plants and low MDA content.