水稻不同粒位籽粒的结实能力  

Ripening Abilities of Spikelets on Different Positions of Panicle in Rice (Oryza sativa L.)

作　　者：王余龙[1] 姚友礼[1] 李昙云[1] 蔡建中[1] 

机构地区：[1]江苏农学院稻麦研究室,江苏扬州225001

出　　处：《作物学报》1995年第4期434-441,共8页Acta Agronomica Sinica

基　　金：江苏省自然科学基金资助项目

摘　　要：供试品种为武育粳2号.设分蘖肥、促花肥、保花肥、粒肥及水分等处理,研究其对一、二次枝梗各粒位籽粒粒重和饱粒率的影响.结果表明:(1)施氮量、施肥时期、土壤水分状况对不同粒位籽粒饱粒率和粒重的影响程度不同;(2)在一次枝梗六个粒位中,第1粒的饱粒率既有最高的,也有最低的,还有处于2—5位的,其它粒位也是如此,二次枝梗籽粒亦有类似趋势;(3)二次枝梗各粒位籽粒的粒重顺序与开花早迟一致,一次枝梗籽粒除第二粒外,其它粒位籽粒的粒重顺序因栽培条件不同而变化.Experiments with nitrogen application dates and rates as well as water supply levels were carried out with Japonica rice Wuyujing No. 2 in pot. Effects on fulfilled grain percentage and grain weight in different grain positions were analysed. Results showed that: 1. Effects on the fulfilled grain percentages and grain weights varied with grain positions. 2. The fulfilled grain percentage of the Ist grains on primary branches might range from the highest to lowest among the six grain positions. The same trend was observed in other grains on primary branch and that on secondary branch. 3. Sequences of grain weight on different positions of secondary branches was identical in order of their flowering, and that of primary branch was sub-jected to the treatments except the 2nd grain.

关 键 词：水稻 粒位 饱粒率 粒重 氮素 水分 

分 类 号：S511.101[农业科学—作物学]