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对不同源库特性水稻品种齐穗期LAI,单位面积颖花量的研究结果表明,品种单位面积实粒数与齐穗期LAI,单位面积颖花量的关系均为抛物线方程:y=ax+bx~2。抛物线的顶点即品种的最适颖花量和齐穗期最适LAI有明显差异,其中秀杂单位面积最适颖花量和齐穗期适宜LAI均较高,而其它品种不是两者均低就是两者不平衡,因而产量受到影响。从库(颖花)效率来看,在氮肥增加时,秋光和秀杂的库效率高,其余几个品种的库效率都明显较低。由此可见,在高产育种上,应注意选拔单位面积最适颖花量和齐穗期最适LAI及库效率均高的优良材料。
The results of LAI and spikelet yield per unit area at heading stage showed that the relationships between grain number per unit area and LAI per unit area and spikelet per unit area were parabolic equations: y = ax + bx ~ 2. The optimal spikelet of the parabola, ie, the optimal spikelet size and the optimum LAI at heading stage, were significantly different. The optimal spikelet size and littoral LAI were all higher, while the other varieties were not both low Is the imbalance between the two, and thus affected the yield. From the library (spike) efficiency point of view, when the nitrogen fertilizer increases, the Qiu light and show hybrid library efficiency, the rest of several varieties of library efficiency are significantly lower. Thus, in high-yielding breeding, attention should be paid to select the best per unit area of ?? the optimum volume and full heading stage LAI and library efficiency are high quality materials.