播种量和育秧方式对籼粳杂交稻甬优1540秧苗素质的影响

以生产上应用面积较大的广适性籼粳杂交稻甬优1540为材料,设置钵苗育秧和毯苗育秧2种育秧方式以及4种播种量处理,研究不同播种量和育秧方式对籼粳杂交稻秧苗素质的影响。结果表明,随着播种量的增加,无论是钵苗育秧还是毯苗育秧,各秧苗素质指标总体上呈降低趋势。同一播种量条件下,钵苗育秧处理的株高极显著高于毯苗育秧处理;钵苗育秧处理出苗率在S4播种量（8粒/孔）时显著低于毯苗育秧处理（86.0 g/盘）,其他播种量下无显著差异。2种育秧方式的叶龄和茎基宽在S1播种量（2粒/孔或21.5 g/盘）时差异不显著,在其他播种量时钵苗育秧处理显著或极显著高于毯苗育秧处理。2种育秧方式的根长、地上部干物质量和地下部干物质量仅在低播种量时差异显著;同一播种量下2种育秧方式间的根数无显著差异。

Effects of Different Seeding Rates and Seedling Raising Methods on Seedling Quality of Indica-Japonica Hybrid Rice Yongyou 1540

In this study, Yongyou 1540, a wide adaptability indica-japonica hybrid rice with a large area of application in production, was used as the material to study the effects of different seeding rates and seedling raising methods on the seedling quality of indica-japonica hybrid rice, by setting two seedling raising methods of pot seedling and carpet seedling and four seeding rates. The results showed that all seedling quality indexes showed a decreasing trend in general with the increase of seeding rates, whether it was pot seedling or carpet seedling. Under the same seeding rate, the plant height of pot seedling was significantly higher than that of blanket seedling; the germination rate of S4 treatment（8 grains/hole） was significantly lower than that of the carpet seedlings, and there was no significant difference in other seeding rates. At S1 seeding rate（2 grains/hole）, there was no significant difference in leaf age and stem base width among two seedling raising methods, and at other seeding rates, the leaf age and stem base width of pot seedlings was significantly or extremely significantly higher than that of carpet seedlings. The root length, dry weight of aboveground parts and underground parts of two seedling raising methods were significantly different only at low seeding rate, while the root number of two seedling raising methods at the same seeding rate had no significant difference.