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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、饱粒率在同枝梗内的顺序主要取决于栽培条件
Under the condition of pot experiment, salt treatment was conducted on 78 rice grains with the same grain weight in different parts of the rice panicle with salt-japonica No.2 as tested varieties, nitrogen in facilities, nitrogen application period, moisture, shading, Effects of grain weight and grain filling rate at different grain positions of branch. The results showed as follows: (1) The grain weight, grain weight and grain-filling rate of all the grains with the same position of the first and second branchlets in different parts of rice panicle had upper> middle> lower, Upper> Lower> Middle, Middle> Upper> Lower, Middle> Lower> Upper, Lower> Middle> Upper, Lower> Upper> Middle 6 types. (2) The grain weight (grain weight and grain weight) of grain at each position of the second branch was affected by the cultivation conditions, but the order of the grain filling rate was the same as that of the first stage, The order of grain weight and grain-filling rate in the same stems of primary branchlets depends on the cultivation conditions