在小麦苗期、花前和花后喷施0.025%和0.25%的双胍三乙酸盐溶液,促进了幼苗生长,但对根部无效。花前施用双胍盐因粒数增加而使穗重提高25—27%。花后施用仅增加了粒重,故使穗重增加20%。苗期和花期施用,使表观光合强度增加8—10%,而蒸腾强度不变。施用双胍盐使水分利用率增加15%。 Spraying 0.025% and 0.25% of the biguanide triacetate solution at seedling stage, pre-flowering and post-flowering promoted seedling growth but was ineffective at the roots. Pre-application of biguanidine salts increased panicle weight by 25-27% due to increased grain number. After anthesis, only the grain weight was increased, so the panicle weight increased by 20%. Seedling and flowering applications, the apparent photosynthetic intensity increased by 8-10%, while the transpiration intensity unchanged. Applying biguanide salts increased water use efficiency by 15%.