秧龄对机插早稻秧苗素质、分蘖能力及产量影响

摘要

A test of seedling flexibility was carried out with two rice varieties (Zhongzao39 and Zhuliangyou211) as materials in Yongan town, Liuyang City at 2015. The results showed that with 20 days seedling age for machine-transplanted, the seed setting rate of Zhongzao39 and Zhuliangyou211 reached the highest by 83.8% and 80.9%, respectively, and so did their yield, achieved 7.0 t/hm2 and 8.0 t/hm2, respectively. The ability of tillering and yield have close relationship amongto speciesand seedling age of rice. The seedling age at 15-25 d is appropriate in Liuyang area, longer or shorter seedling age may affect the ability of tillering and yield.%为探讨浏阳稻区机插早稻高产所需最佳秧龄，2015年春在浏阳永安镇以适宜湖南稻区的常规稻中早39和杂交稻株两优211为供试品种，开展了早稻秧龄弹性试验。结果表明：中早39及株两优211均以20 d秧龄的处理结实率最高，分别达到83.8%和80.9%；实际产量也以20 d秧龄的最高，分别为7.0 t/hm2和8.0 t/hm2。秧苗的分蘖能力及产量与品种和秧龄有密切关系，在浏阳地区秧龄以15~25 d为宜，秧龄过长或过短都会影响秧苗的分蘖能力及产量。