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以扬稻 6号 (籼稻 )、日本晴 (粳稻 )为试材 ,设计不同施氮时期 ,改变颖壳生长发育所需的物质和能量 ,研究其对稻穗不同部位籽粒谷壳大小 (谷壳长度、宽度和面积 )、重量和充实程度 (单位面积谷壳重 )的影响。结果表明 :①施用分蘖肥 ,可促进稻穗一、二次枝梗不同部位籽粒特别是下部枝梗籽粒谷壳的大小和重量 ,品种间表现一致 ,对谷壳充实程度的影响因品种而异 ;施用促花肥、保花肥或过多施用穗粒肥 ,稻穗一、二次枝梗各部位籽粒谷壳的大小、重量和充实程度均减小 ,减小幅度多以上、中部枝梗籽粒较大 ,品种间表现一致 ;施用基肥对稻穗不同部位籽粒谷壳性状的影响因品种而异。②促进谷壳的生长与发育 ,有利于籽粒同化产物的积累 ,糙米的长度、宽度、厚度、体积和重量均显著增加 (r为0 .35 0 7 ～ 0 .96 76 ) ,进而使粒重大幅度提高 (r为 0 .70 93 ～ 0 .96 86 )。
Yangdao 6 (indica rice) and Nipponbare (japonica rice) were used as materials to design different nitrogen application periods to change the material and energy needed for growth and development of glume, and to study the effect of different materials on chaff size (chaff length , Width and area), weight and extent of filling (weight of chaff per unit area). The results showed that: (1) The application of tillering fertilizer could promote the size and weight of chaff in different parts of the primary and secondary branches of rice, especially in the lower branch of the rice. The effects on the enrichment degree of chaff were different The size, weight and enrichment degree of grain chaff in all parts of rice primary and secondary branch stems decreased with the increase of flowering fertilizer, peanut fertilizer or excessive application of ear grain fertilizer. The results showed that the effects of different types of basal fertilizer on chapa-hull traits in different parts of rice panicle varied with different varieties. (2) The growth and development of chaffs were promoted, which was conducive to the accumulation of assimilation products. The length, width, thickness, volume and weight of brown rice increased significantly (r = 0.370 ~ 0.9676) The magnitude increased (r = 0.7093-0.96 86).