水稻籽粒受容活性及其控制——稻穗不同部位、粒位籽粒的粒重与饱粒率  

GRAIN CAPACITY ACTIVITY AND ITS REGULATION IN RICE ——GRAIN WEIGHT AND FULFILLED GRAIN PERCENTAGE IN DIFFERENT PARTS AND GRAIN POSITIONS IN THE PANICLE

作　　者：黄建晔[1] 李昙云[1] 王余龙[1] 姚友礼[1] 蔡建中[1] 

机构地区：[1]江苏农学院稻麦研究室

出　　处：《江苏农学院学报》1997年第3期8-14,共7页Jiangsu Agricultural Research

基　　金：江苏省自然科学基金;国家留学回国人员资金资助

摘　　要：在盆栽条件下，以盐粳２号为供试品种，设施氮量、施氮时期、水分、遮光、剪叶、剪穗等７８个处理，研究其对稻穗不同部位相同粒位籽粒、同枝梗不同粒位籽粒粒重和饱粒率的影响。结果表明：（１）稻穗不同部位１、２次枝梗的相同粒位所有籽粒（含饱、瘪、空粒）的粒重、饱粒重、饱粒率均有上部＞中部＞下部、上部＞下部＞中部、中部＞上部＞下部、中部＞下部＞上部、下部＞中部＞上部、下部＞上部＞中部等６种类型。（２）２次枝梗各粒位籽粒的粒重（所有籽粒重、饱粒重）、饱粒率在同枝梗内的顺序虽受栽培条件的影响，但主要决定于开花早迟，而１次枝梗各粒位籽粒的粒重。Spikelets on one rice panicle were separated into 27 grain positions: upper, middle and lower part of the panicles, each with primary branch and secondary branch, with grain positions 1 to 6 on the primary branch, and grain positions 1 to 3 on the secondary branch. Treatments of nitrogen application rate and date, irrigation level, shading, leaf and branch cutting were carried out in pot with japonica rice Yanjing 2 in analyzing their influences on grain weights and fulfilled grain percentages of spikelets on one grain positions in different parts of the panicle and of spikelets in different grain position in the primary and secondary branch in the same part of the panicle. Results showed that the precedences of grain weight of spikelets on one grain position in different part of the panicle in different treatments could be any of the following 6 types: Upper (U)>Middle(M)>Lower(L), U>L>M, M>U>L, M>L>U, L>U>M, L>M>U. The precedences of grain weight of different grain position in the secondary branch in different treatments were mainly subjected to the flowering order; while in the primary branch they were mainly subjected to the cultural conditions (treatments). The same trends were also found in the precedences of all ful-filled grain weight and ful filled grain percentage.

关 键 词：水稻 粒重 结实率 控制 

分 类 号：S511.01[农业科学—作物学]