温度、光照对80优121生育期及产量因素的影响

对杂交中粳８０优１２１在８个不同播期下的生育期、产量因素、理论产量与影响产量因素总积温、光照时数的相关研究。结果表明８０优１２１为中感温、中感光组合；随播期的推迟其全生育期缩短，播期每推迟１０ｄ，全生育期缩短５～７ｄ，播始历期缩短４～６ｄ；构成８０优１２１产量因素的单株有效穗、每穗总粒数与影响该因素的生育时段总积温相关极显著，相关系数分别为０．８４１和０．７０４，结实率不仅与影响该因素的生育时段总积温相关，而且与影响该因素的生育时段光照时数相关，相关系数分别为０．８０３和０．７７１，均达显著水平。千粒重与总积温、光照相关不显著。合肥地区适宜播期为５月上中旬。

Effect of Accumulated Temperature and Light Duration on the Growth Period and Yield Component of Hybrid Rice 80 You 121

The relationship between the growth period,yield component of japonica hybrid rice 80 you 121 and accumulated temperature,light duration was studied. The results showed that 80 you 121 was a thermosensitivity combination;the coefficents between the number of effective tiller,spikelets per plant and accumulated temperature were significant correlation,(0 841 and 0 704 respectively);the coefficents between 1 000 grain weight and accumulated temperature,light duration were significant correlation,(0 803 and 0 771 respectively). The coefficents between seed setting and accumulated temperature,lignt duration were not significant.