摘要
通过插秧量与行距配置对杂交稻和常规稻分蘖及穗重的影响研究表明 ,不同插秧量对水稻茎蘖消长规律存在明显影响 ,插单苗的在整个分蘖过程中茎蘖量比插3苗的少 ,最终的成穗数明显要少。其茎蘖消长规律的差异主要表现在辽粳326和优418最高分蘖量和最终有效穗数高于辽优3225,而辽优3225分蘖力较低 ,则是由于该品种分蘖峰值提前 ,分蘖两极分化早所致。各种处理成穗率相近 ,但在不同蘖位的成穗机制上存在差异 ,插3苗的成穗蘖位较为集中 ,而插单苗的成穗蘖位分布分散 ,并造成插3苗的穗重分布比插单苗的分散。杂交稻的穗重变异性大 ,分布较常规稻分散 ,具有产生大穗的潜力 ,而插单苗更利于杂交稻大穗潜力的发挥。
The effect of seedling quantity and row spacing on the tillers and panicle weight of hybrid and conventional rice varieties was studied.The result showed that different seedling quantities had obvious influences on tillers'growth and decline.The one-seedling rice had fewer stems than three-seedling rice during the whole phase,thus had appanently fewer seediong panicles.The difˉferences of stems were represented by the fact that the maximal number of tillers and number seeding panicles of Liaojing326and Shiyou418were higher than those of Liaoyou3225,while the lower tillering ability of Liaoyou3225was due to the earlier occurrence of its maximal tillers and polarization.The seeding tiller percentage was similar in different treatments,but the mechanisms of seeding tiller formation at different tiller positions were different.The seeding tiller positions of one-seedling rice were more dispersive than those of three-seedling rice.The panicle weight distribution of one-seedling rice was more dispersive than that of three-seedling rice.The panicle weight of hybrid rice had high variability,more dispersive and high potential of forming big panicles.Moreover,one-seedling hybrid rice was like to reach the big panicle potential.
出处
《沈阳农业大学学报》
CAS
CSCD
2003年第6期401-405,共5页
Journal of Shenyang Agricultural University
基金
教育部高等学校博士点基金(201005)
教育部高等学校骨干教师资助计划课题资助项目
