不同播种密度对垦粳5号秧苗素质及产量的影响

采用单因素完全随机设计,以垦粳5号水稻(Oryza sativa L.)品种为试验材料,在不同播种密度条件下对秧苗株高、根长、根数、充实度等多方面产生的影响进行比较研究。结果表明,随着播种密度的增大,根长、根数、茎基宽以及充实度均呈降低趋势,且差异达到显著或极显著水平,播种密度与理论产量呈负相关,但差异不显著,秧苗素质指标与理论产量的相关系数排序为百株地上干重充实度根长根数百株地下干重茎基宽。播种密度为125 g/盘的产量最高,秧苗素质各项指标表现良好,适当降低秧田播种量能够改善水稻秧苗素质。

Effect of Different Sowing Density on the Quality and Yield of Kenjing 5 Seedling

Using single-factor completely random design, Kenjiandao 5 was studied to understand the effect of different sowing density on seedling height, root length, root number and plumpness of seedlings. The results showed that the root length, root number, base stem width and plumpness decreased as the sowing density increased. The differences were a significant. sowing density was negatively corelated to the theoretical yield, but the difference between them was not significant. The correlation coefficient between quality indexes of seedlings and the theoretical yield showed the order of 100 strains dry weight aboveground>plumpness>root length>root number>100 strains dry weight underground >base stem width. The yield was the highest for the sowing density of 125 g/disk, the indexes of seedling quality were good, appropriate reduction of the amount of nursery seeding can improve the seedling quality of rice.