In upland rice the decrement was greater in the first than in the second crop, with genotypes Tainung sel. 1, Tainung sel. 2, and Nohrin Mochi 4 had better yield performance in both crops.

• 陆稻品种（系）因期作不同表现不同，第一期作减少幅度大于第二期作，其中台农选1、2号及农林糯4号在两期作处理间表现较稳定，即对水分多寡之反应较钝感。