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促根剂系为难以生根的花卉而准备的,也为促进早生根和根群壮旺而设。实践证明,它既有积极的作用,也有消极的作用。如使用得当会产生促进,反之亦有抑制、破坏作用。故使用时必须掌握其浓度和用法,又要依据植株的分生组织强弱而定,不可盲目使用。一、难长根者宜浓宜多浸:难长根的植物,大都靠种籽分株法来繁衍后代的。因此,它的枝较少或不具“根原体”,薄壁细胞不活跃,分生组织不发达。离体后,生根的进程长,易受生态条件的制约,所以难以生根。对这类扦插材料,如进行离体扦插时,必须以高浓度的促根剂浸渍多时,才会产生强大的激动去催化、诱导,才能充分发挥促根剂的积极作用。通常
The rooting agent is prepared for hard-to-root flowers and also for the promotion of early roots and root vigor. Practice has proved that it has both positive and negative effects. If used properly will have a promotion, and vice versa inhibit, destroy the role. Therefore, it must be used to control its concentration and usage, but also based on the strength of the plant meristem may not be blind to use. First, it is difficult for root-rich should be more concentrated: more difficult to plant roots, mostly by ramets seed multiplication of offspring. Therefore, its branches are less or not “root”, parenchyma cells are not active, meristem is underdeveloped. Ex vivo, the rooting process is long, vulnerable to ecological constraints, it is difficult to take root. For such cutting materials, such as in vitro cutting, must be high concentrations of rooting agent impregnated for a long time, will have a strong excitement to induce, in order to give full play to the positive role of rooting agent. usually