摘要
观察水稻施用立丰灵后的节间形态、抗倒性及产量性状的生理效应,结果表明:①立丰灵抑制节间伸长期的纵向伸长,促进节间伸长期的横向生长,使节间外径增粗,秆壁加厚;②立丰灵通过矮缩节间减少弯曲力矩和增进节间粗厚度提高抗折力的双重作用,来降低倒伏指数,即增加抗倒力;③水稻倒4、倒3节间是最易倒伏的部位,因而,倒4、倒3节间的倒伏指数,是评价抗倒剂效能及其适宜技术,鉴定水稻品种抗倒性的衡量指标;④在拔节前7 d至拔节始期喷施5%立丰灵600～750 g.hm-2,水稻抗倒力最强,并促进穗粒发育显著提高产量。
Physiological effects of Lifengling, an anti lodging agent, on internode＇s morphology, lodging resistance and yield traits of rice were observed. The results showed that （1） Lifengling inhibited the longitudinal elongation of internodes, while promoted the latetudinal growth, resulting in the increases of internode＇s diameter and stalk wall＇s thickness; （2） it decreased lodging index （or, increased lodging resistance） through dwarfing the internodes to reduce bending torque and thichening the stalk walls to increase rigidity; （3） the lodging indices of the 3^rd and 4^th internodes from the top, which were most susceptable to lodging, were used to evaluate the rice plant＇s overall resistance to lodging; and （4） when a rice plant was sprayed with 5% Lifengling at the rate of 600--750 g·hm^-2 from 7 d before jointing stage till the jointing stage, the greatest lodging resistance was obtained, and at the same time, the most significantly improved grain development and yield for the rice plant acchieved.
出处
《福建农业学报》
CAS
2011年第3期355-359,共5页
Fujian Journal of Agricultural Sciences
基金
福建省现代农业水稻产业技术体系建设(闽财指[2009]528号)
福建省农业厅科技项目(2009-04)
福建省财政专项--福建省农业科学院科技创新团队(STIF-Y04)
关键词
水稻
抗倒剂
抗倒性
rice
anti-lodging agent
lodging resistance
