美香占2号是目前广东省种植面积最大的高端丝苗米品种，具有米质优、再生能力强、适应性广的特点。本文总结了该品种2018—2021年在粤北作低桩机收再生稻的种植表现。美香占2号再生季生育期84~89 d，早季收割至再生季齐穗期有效积温893 ℃~1 092 ℃，再生季产量为293.5~343.0 kg/667 m²，为早季产量的69.1%~74.6%。2021年，“早稻-再生稻”模式下两季总成本投入1 974.5元/667 m²，经济效益为824.3元/667 m²。与一季稻相比，再生稻模式增产328.0 kg/667 m²，经济效益增加740.3元/667 m²；与双季稻相比，再生稻模式两季总产降低57.0 kg/667 m²，节省成本582.5元/667 m²，经济效益增加377.3元/667 m²。本文还总结了美香占2号作低桩机收再生稻的关键栽培技术，以期为华南地区机收再生稻高产栽培提供参考。

Meixiangzhan 2 is a high-quality Simiao rice variety with the largest planting area in Guangdong Province. It has the characteristics of high quality, strong regeneration ability and wide adaptability. This paper summarized the planting performance of Meixiangzhan 2 as machine-harvested low stubble ratooning rice in northern Guangdong from 2018 to 2021. In ratooning season, Meixiangzhan 2 had a growth period of 84~89 days, and the effective accumulated temperature from harvest of the early season to the heading stage of the ratooning season was 893 ℃~1 092 ℃. The grain yield of ratoon rice was 293.5~343.0 kg/667 m², amounting to 69.1%~74.6% of that of early season. In 2021, the total cost investment and economic benefit of early rice-ratooning rice mode was 1 974.5 yuan/667 m² and 824.3 yuan/667 m², respectively. Compared with the single-season rice, the yield of ratooning rice mode increased 328.0 kg/667 m², and the economic benefit increased 740.3 yuan/667 m², respectively. Compared with the double cropping rice, early rice-ratooning rice mode decreased the total grain yield by 57.0 kg/667 m², but saved the total cost investment by 582.5 yuan/667 m², and increased the economic benefit by 377.3 yuan/667 m². This paper also summarized the key cultivation techniques of Meixiangzhan 2 as machine-harvested low stubble ratooning rice, in order to provide reference for high-yield cultivation of mechanically harvested ratooning rice in South China.