论文部分内容阅读
为了探明杂交水稻制种母本适宜的机插密度,选用湘陵628S、丰源A、广占63S、深95A、Y58S和隆科638S等6个不同生育期和分蘖成穗特性的母本,以人工移栽16.7×20(cm)作对照,研究不同机插密度对母本群体生长发育特性的影响。结果表明:6个母本中随着机插密度的减小,播始历期、抽穗历期及盛穗历期呈延长趋势,穗平颖花数有增长趋势,成穗率则表现为减少趋势,其中抽穗历期与盛穗历期在机插密度处理间差异不显著。单位面积最高苗、有效穗、颖花数在湘陵628S、丰源A、广占63S、深95A中随着机插密度的减小而减小,均以高密度18×14(cm)最高。综合抽穗特性和穗粒构成,湘陵628S、丰源A、深95A、广占63S、隆科638S五个母本均以机插密度18×14(cm)最为适宜,Y58S以机插密度20×14(cm)最为适宜。机插条件下,应根据机插密度对不同特性母本播始历期的影响,相应调整父母本播差期以确保花期相遇。
In order to investigate the suitable density of maternal host for hybrid rice seed production, six female parents with different growth stages and tillering characteristics were selected from Xiangling 628S, Fengyuan A, Guanghan 63S, Shen 95A, Y58S and Longke 638S , And artificial transplanting 16.7 × 20 (cm) as a control to study the effects of different machine density on the growth and development characteristics of the female parent population. The results showed that with the decrease of insertion density, the sowing date, heading date and Sheng spike duration tended to increase with the increasing of spikelet spikelet number and spikelet percentage There was no significant difference between the heading dates and the spike duration of Sheng-Sui during the heading period. The highest spikelet, effective spike and spikelet per unit area in Xiangling 628S, Fengyuan A, broadly occupied 63S and deep 95A decreased with the decrease of insertion density, all of which were highest at 18 × 14 (cm) . Combining with heading characteristics and ear grain composition, the five female parents of Xiangling 628S, Fengyuan A, Shen 95A, Guangxian 63S and Longke 638S were the most suitable for the insertion density of 18 × 14 (cm), and the density of Y58S was 20 × 14 (cm) is most suitable. Machine insertion conditions, should be based on the machine density on the characteristics of different characteristics of the mother of the broadcast period of the impact of the corresponding adjustment of the parent sowing period to ensure the flowering meet.