【目的】 以叶面喷施的形式研究硒对再生稻产量及品质的影响,旨在为再生稻优质、高产栽培技术提供依据。【方法】 试验于2016年在湖北省洪湖市沙口镇进行,以丰两优香1号为试验材料,Na₂SeO₃为供硒源;设置0、5.625和11.250 g/hm²三个硒肥施用量,始穗期、齐穗期和始+齐穗期三个施硒时期进行叶面喷施。【结果】 叶面喷施Na₂SeO₃的处理再生稻产量均高于对照组,始穗期喷施Na₂SeO₃处理的再生稻产量与对照相比虽然有提升但并不显著;齐穗期施用5.625 g/hm²、11.250 g/hm² Na₂SeO₃处理分别增产2.59%和5.50%,始穗期+齐穗期施用5.625 g/hm²、11.250 g/hm² Na₂SeO₃处理分别增产4.83%和7.08%;始穗期与齐穗期均喷施11.250 g/hm² Na₂SeO₃处理产量最高,为5533 kg/hm²,叶面施用Na₂SeO₃能增加再生稻每穗粒数、实粒数和结实率。齐穗期施用11.250 g/hm² Na₂SeO₃的再生稻稻米整精米率最高,且显著高于对照组,最高值为61.37%;齐穗期施用11.250 g/hm² Na₂SeO₃的再生稻稻米垩白粒率最低,且显著低对照组,最低值为9.37%。【结论】 研究表明,施用Na₂SeO₃能提升再生稻产量,改善再生稻米品质,提升再生稻整精米率,降低垩白率。始穗期与齐穗期均喷施11.250 g/hm² Na₂SeO₃再生稻产量达到最高;齐穗期施用11.250 g/hm² Na₂SeO₃再生稻品质最优。

【Objective】 The objective of this study is to reveal the effects of foliar application of selenium on the yield and quality of ratooning rice, which will lay a theoretical basis for high quality and high yield cultivation of ratooning rice.【Method】 The experiment was carried out at Shakou Town, Honghu City, Hubei Province in 2016 with Fengliangyouxiang1 as the experimental material and Na₂SeO₃ as selenium source. Foliar spray of Na₂SeO₃ was conducted in the initial heading stage, full heading stage, and initial heading date+full heading date at 0g/hm², 5.625g/hm², and 11.250g/hm².【Result】 The foliar application of Na₂SeO₃ increased the yield of ratooning rice with no significant difference between the control and the treatment with Na₂SeO₃ spraying in initial heading stage. Na₂SeO₃ spray during the full heading date at 5.625g/hm² and 11.250g/hm² increased the rationing rice yield by 2.59% and 5.50%, respectively, foliar spraying of 5.625g/hm² and 11.250g/hm² Na₂SeO₃ duning initial heading date and full heading date increased the yield by 4.83% and 7.08%, respectively. The suitable dosage was 11.250g/hm² for initial heading date and heading date, with the highest yield of 5533.33kg/hm². The foliar application of Na₂SeO₃ increased yield by increasing grain number, filled grain number and seed setting rate. The foliar application of Na₂SeO₃ can improve the quality of ratooning rice. The suitable dosage was 11.250g/hm² for full heading date. The spraying of selenium fertilizer improved quality by increasing whole polished rice rate, and reduced the chalky grain rate. At the full heading date, under foliar spraying of 11.250g/hm² Na₂SeO₃ the whole polished rice rate was the highest(61.37%) and the chalky grain rate was the lowest (9.37%).【Conclusion】 The results showed that the application of Na₂SeO₃ could improve the yield and quality of ratooning rice. The yield of ratooning rice peaked during initial heading date and full heading date at 11.250g/hm² Na₂SeO₃; ratooning rice had the best quality at 11.250g/hm² Na₂SeO₃ in the full heading date.