Abstract: To study the effects of different reagents on seedling quality of machine-transplanted early rice, the authors evaluated the effects by soaking seeds, mixing seeds and spraying seedlings. The seedling quality evaluation revealed that KH2PO3 was the best treatment during soaking seeds. Meanwhile, Na2HPO4, KH2PO3 and CaCl2 were antagonistic each other. Gaoqiao was the best one after mixing seeds and the performance of all the three treatments were better than the control. It was distinct that Gaoqiao was quite good for growing root ability. The mixture of Na2HPO4, KH2PO3 and CaCl2 was the best treatment if spraying seedlings. Generally speaking, commercial reagents used for mixing seeds were better than inorganic chemicals used for soaking seeds. The effects of KH2PO3 were close to those of commercial reagent, and the effects by soaking seeds or mixing seeds were better than those by spraying seedlings. 

Key words: machine-transplanted, early rice, seedling raising, cold-resistant

摘要： 用不同试剂对机插早稻种子或秧苗进行处理，结果发现，在浸种时添加试剂的各处理中，KH2PO3处理的表现最好，而混合试剂处理之间存在拮抗作用；在拌种时添加试剂的各处理中，高巧处理的表现最好，3种试剂的表现均好于对照，其中高巧对秧苗发根能力方面的作用十分明显；后期采用喷施的各处理中，混合试剂处理效果最佳。从整体上看，商品拌种剂使用效果优于无机化合物的浸种效果，而KH2PO3处理的效果比较接近拌种剂，前期浸种、拌种的效果好于后期喷施。

关键词: 机插, 早稻, 育秧, 抗低温