壮秧剂施用量对杂交稻五优308农艺性状及产量的影响

Effects of Seedling Strengthen Agent Application Rate on Agronomic Traits and Yield for Wuyou 308

以杂交稻五优308为试验材料,研究壮秧剂施用量对杂交稻农艺性状及产量的影响。结果表明,施用壮秧剂可显著改善晚稻分蘖进程,分蘖早发快长,显著提高分蘖成穗率;优化群体整齐度,打破了主穗顶端优势,加快分蘖穗发育的进度;改善晚稻源库关系,粒叶比趋于合理;优化亩穗数、穗粒数和千粒重等产量构成参数。在本研究条件下,壮秧剂最佳施用量为29.206kg/hm2,可以实现水稻产量8 592.68kg/hm2的高产目标。

＂Wuyou 308＂ was used as material to study the effect of seedling strengthen agent application rate on agronomic characters and yield of hybrid rice. The results indicated that application of seedling strengthen agent could significantly improve rice tillering process that made the tillering earlier and faster and significantly increased tillering rate;Stand uniformity was optimized, apical dominance of rice main stem was broken and progress of tiller panicles development was sped up;Sink-source relation of late rice was improved and grain-leaf ratio was rationalized. And it was also optimized the yield components including ear number, grain number per ear and 1000-grain weight. Therefore, the optimum application rate of seedling strengthen agent was 29. 206kg/hm2, with which high yield of 8 592.68kg/hm2 of rice can be achieved.