夜温升高对双季晚稻产量和品质影响

The Effects of the Elevated Nighttime Temperature on the Yield and Quality of Double Season Late Rice

利用2间玻璃室内夜间不同的温度条件，研究了生长期间夜温升高对双季晚稻产量和品质的影响。结果表明，夜温升高促进双季晚稻的生长发育，缩短双季晚稻生育期4～6d；前期夜温升高提高了双季晚稻的分蘖能力，增加了有效穗；中后期夜温升高有利于双季晚稻颖花分化和籽粒灌浆，提高结实率；另外，夜温升高有利于双季晚稻稻米的碾磨和外观品质形成，降低直链淀粉的含量。结论是夜温升高有利于双季晚稻产量与品质的形成。

Two glass houses with different nighttime temperatures were used to investigate the effects of elevated nighttime temperature on the grain yield and quality of double season late rice. The results showed that the elevated nighttime temperature hastened plant development rates, and shortened rice growth period by 4 to 6 days. The elevated nighttime temperature facilitated the tillering ability of late rice, increased the effective panicles in earlier stage. And the spikelets differentiation of late rice were improved and seed-setting rate were increased in middle stage. In addition, rice milling and appearance quality became better than control, and the content of amylase decreased after treated by higher nighttime temperature. The conclusion is that the elevated nighttime temperature improved the yield and quality of double season late rice.