选用3个水稻品种和2个陆稻品种,在正常水分管理、分蘖期及抽穗期水分胁迫下调查产量及产量相关性状的变化来评价各个材料对水分胁迫的反应.结果表明:水稻和陆稻在不同生育期水分胁迫条件下都表现出不同程度的减产,但陆稻品种较水稻品种更能在水分胁迫条件下保持高产、稳产,说明通过水稻品种改良以提高水稻品种在水分胁迫条件下的高产性、稳产性是可能的. Three rice cultivars and two Upland rice cultivars were selected to investigate the responses of different materials to water stress under normal water management, tillering stage and heading date under water stress.The results showed that the rice and upland rice Under different water stress conditions, the rice varieties showed different degrees of yield reduction. However, the upland rice varieties were more able to maintain high yield and stable yield under water stress conditions than rice varieties, indicating that rice varieties could be improved under water stress conditions through rice variety improvement High yield, stable yield is possible.