两系籼型杂交水稻桂两优2号是广西首个超级稻品种,由广西农业科学院水稻研究所育成,具有高产、稳产、抗倒伏、适应性广等特点。桂两优2号可作早、晚稻两用,并且早稻产量高于晚稻。试验结果表明,结实率高和单位面积颖花量大是桂两优2号作早稻比作晚稻产量高的主要原因,并提出了缩小晚稻与早稻产量差距的栽培管理技术。 Two-line Indica Hybrid Rice Guiliangyou 2 is the first super rice variety in Guangxi. It was bred by the Rice Research Institute of Guangxi Academy of Agricultural Sciences. It has the characteristics of high yield, stable yield, lodging resistance and wide adaptability. Gui Liangyou 2 can be used for early and late rice dual purpose, and the yield of early rice is higher than late rice. The results showed that high seed setting rate and large spikelets per unit area were the main reasons for the high yield of early rice and late rice in Gui Liangyou 2, and put forward the cultivation and management techniques to reduce the yield gap between late rice and early rice.