论文部分内容阅读
为了探讨水稻品种生产力的发展方向，选用了在水稻生产发展的不同阶段上具有一定代表性的5类10个籼型水稻品种（组合），进行了比较研究，结果表明：不同发展阶段上的水稻品种（组合）产量差异显著，从地方高秆品种→改良高秆品种→老改良矮秆品种→新改良矮秆品种→杂交稻，稻谷产量递增74．9～96．3kg／666．7m2。产量与单位面积总颖花数呈极显著正相关（r＝0．897**）。5类水稻品种（组合）中，以杂交稻在各生育期中干物质积累量最高，新改良矮秆品种次之，其它品种较低。产量的11．1％～37．7％来源于抽穗前茎鞘贮存物质。茎鞘贮存物质对产量的贡献率随着产量提高而增加。高秆品种发展至矮秆品种，其产量主要随经济系数提高而提高，而矮秆品种发展至杂交稻，其产量主要随着生物学产量增加而增加。
In order to explore the development direction of rice variety productivity, 10 types of indica rice (combinations) of 5 types and 10 varieties which were representative at different stages of rice production development were selected and compared. The results showed that rice in different developmental stages The yield of the cultivars (combinations) was significantly different from that of the local high-stalk varieties → improved high-stalk varieties → old improved dwarf varieties → newly improved dwarf varieties and hybrid rice. The yield of paddy increased by 74.9-96.3 kg / 666.7m2. The yield was significantly and positively correlated with the total number of spikes per unit area (r = 0.897 **). Among the five types of rice varieties (combinations), the dry matter accumulation of hybrid rice was the highest in all growth stages, followed by the new improved dwarf varieties, while the other varieties were lower. 11.1% ~ 37.7% of the yield comes from stem-sheath storage material before heading. The contribution of stem-sheath storage material to yield increased with increasing yield. The development of high-stalk varieties to dwarf varieties, the yield increased mainly with the economic coefficient increased, while the development of dwarf varieties to hybrid rice, the yield increases with the biological yield increased.