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试验研究结果表明：ＫＨ２ＰＯ４和Ｈ３ＢＯ３单独叶面喷施对大丽花的株高无显著影响，但３ｇ／ｋｇ的ＫＨ２ＰＯ４和０．５ｇ／ｋｇＨ３ＢＯ３混合液喷施可延长大丽花观赏期５ｄ，可使花径增大３．２ｃｍ；采用多效唑（ＰＰ３３３）叶面喷施及根灌相结合的方法，能缩短大丽花节间长度３．０ｃｍ，使株高降低５１．９ｃｍ，并提早１０ｄ现蕾。
The experimental results showed that KH2PO4 and H3BO3 alone had no significant effect on the plant height of Dahurica, but spraying 3g / kg KH2PO4 and 0.5g / kg H3BO3 mixture could prolong the ornamental period of Dahlia for 5 days, Which is 3.2cm in length. The combination of PP333 foliar spray and root irrigation can shorten the internode length of Dahlia by 3.0cm, reduce the plant height by 51.9cm and induce the budding by 10 days earlier.