摘要
选用7个杂交中稻品种为材料,在拔节前7～10 d喷施立丰灵,研究了立丰灵对杂交中稻抗倒性与产量的调控效果。结果表明,株高、基部第2,3,4,5节间长度、抗折力和倒伏指数在不同品种和处理间均有显著差异;倒伏指数与抗折力呈极显著负相关,与株高和基部第1,2,3节间长度呈极显著正相关;喷施立丰灵的处理,基部第2,3节间长度显著降低,第6节间长度显著增加,抗折力提高,倒伏指数降低;施用立丰灵对穗粒结构和产量的影响因品种而异,总体上没有显著影响。
The effects of Lifengling,a new plant growth retardant,on lodging resistance and grain yield of seven medium hybrid rice combinations were studied by spraying it 7~10 days before booting stage.The results showed that there existed significant differences among varieties and Lifengling spraying treatments in plant height,the length of the 2nd,3rd,4th and 5th internodes from the base,stem breaking resistance and lodging index.The lodging index was negatively correlated to breaking resistance at a very significant level,and positively correlated to plant height and the length of the 1st,2nd and 3rd internodes from the base at a very significant level.The treatment by spraying Lifengling shortened greatly the 2nd and 3rd internodes but elongated the 6th internode,resulting in a higher breaking resistance and a lower lodging index.Application of Lifengling had a varied effect on yield and yield structure with different varieties,but the effect was not very remarkable as a whole.
出处
《杂交水稻》
CSCD
北大核心
2011年第1期56-60,80,共6页
Hybrid Rice
基金
国家自然科学基金(30771269)
国家科技支撑计划资助项目(2007BAD65B04-1)
关键词
杂交中稻
植物生长延缓剂
立丰灵
抗倒性
产量
medium hybrid rice
plant growth retardant
Lifengling
lodging resistance
yield
