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试验结果表明 :杂交中稻在 6～ 7叶期大苗单本移栽 ,苗质显著地影响结实期群体源、库及稻谷产量。结实期群体干物质增长量、总颖花量和稻谷产量与秧苗单株分蘖数、苗高干重比呈极显著或显著正相关 ,其定量关系可用y=a+bx直线回归方程表示。在旱、湿秧苗的单株分蘖数和苗高干重比指标量相似时 ,两育秧方式间的结实期群体干物质增长量、总颖花量和稻谷产量差异均不显著。江淮地区杂交中稻 6～ 7叶移栽 ,以秧苗单株分蘖数达 1.7～ 2 .0个 ,苗高干重比 5 .6～ 5 .8为宜
The results showed that the seedling transplanting of mid-season hybrid rice at the 6th to 7th leaf stage significantly affected the population source and sink and the grain yield of rice during grain filling stage. The dry matter growth, total spikelet yield and grain yield of the population during the grain-filling stage were significantly or significantly positively correlated with the tiller number per plant and dry weight of the seedling, and the quantitative relationship was expressed by the linear regression equation y = a + bx. In dry and wet seedlings, the number of tillers per plant and dry weight of seedlings were similar, the difference of dry matter increment, total spikelet yield and grain yield of two groups during seedling stage was not significant. Jianghuai hybrid rice 6 to 7 leaves transplanted to the tiller number of seedlings per plant reached 1.7 ~ 2.0, high seedling dry weight ratio of 5.6 ~ 5.8