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在 6～ 8月间 ,采用质量分数为 5× 10 -5,1× 10 -4 ,2× 10 -4 的多效唑对大丽花地上部分喷施 .结果表明 ,多效唑对高科、中科、矮科 3类型大丽花均有明显的矮化作用 ,但质量分数在 5× 10 -5以上多效唑对大丽花茎粗有负面效应 ;多效唑对花芽分化 ,提早开花有促进作用 ,对分枝和节数生长作用不明显 .多效唑对盆栽大丽花有较好的矮化作用 .
In the period from June to August, the aboveground parts of Dahurica were sprayed with paclobutrazol (5 × 10 -5, 1 × 10 -4 and 2 × 10 -4) The type of dahlia had obvious dwarfing effect, but the mass fraction of more than 5 × 10-5 paclobutrazol had a negative effect on dahlia stem diameter; paclobutrazol on flower bud differentiation, early flowering has a promoting effect on the branch and the number of node growth was not obvious Paclobutrazol has better dwarf effect on potted dahlia.