4个国庆盆菊品种扦插繁殖

Cutting propagation with four cultivars of pot chrysanthemums

以自主选育的国庆盆菊Chysanthemum×morifolium品种‘金陵皇冠’‘Jinling Huangguan’‘金陵阳光’‘JinlingYangguang’‘金陵娇黄’‘Jinling Jiaohuang’‘金陵紫衫’‘Jinling Zishan’为材料,以生根率、根数、最长根长、平均根长、根径、根鲜质量6项指标衡量扦插生根效果,研究了扦插基质、穴盘规格(50孔、72孔、128孔、288孔)、萘乙酸(NAA)处理(0,250,500,750,1 000 mg.L-1)和插穗冷藏(4℃条件下分别冷藏0,14,28,42 d)对扦插生根的影响。结果表明:除插穗冷藏处理外,其余处理对插条生根率无影响,生根率均为100%;草炭∶蛭石=1∶1为最佳基质组合,其次为草炭∶珍珠岩=1∶1;随着穴盘孔数增多,生根效果下降;不同品种对NAA质量浓度的反应存在差异,但在500～750 mg.L-1范围内,可显著增加根长和根鲜质量;冷藏42 d后成活率下降,但可促进‘金陵阳光’的生根数量,冷藏14 d可促进‘金陵阳光’的最长根长和平均根径。

To determine optimal conditions for cutung propagation of four newly bred pot chrysanthemums （Chrysanthemum × morifolium） cuhivars： ＇Jinling Huangguan＇, ＇Jinling Yangguang＇, ＇Jinling Jlaohuang and ＇]inling Zishan＇. Six indexes including： maximum root length, average root length, root diameter, ad- ventitious root number, root fresh weight, and rooting rate were used to evaluate rooting ability. Treatments were： matrices （vermiculite, perlite, and grass charcoal）, plug size （50, 72, 128, and 288-cave）to test the rooting effect, 1-naphthylacetic acid （NAA） concentration （0, 250, 500, 750, and 1 000 mg L-1）, and cold storage period for cuttings （4 ℃ for 14, 28, and 42 d）. The plants were randomly plotted, each plot includes 30 cuttings, and the experiment contains three replicates, 90 cuttings for each cultivar were included. 10 cuttings were sampled from each plot at 20 days after being planted. Kesuits snoweu mat vermwume and grass charcoal （1 ： 1, V ： V） was the optimal matrix for rooting, followed by grass charcoal and perlite （1 ： 1, V ： V）. Rooting ability of ＇ Jinling I-Iuanggnan＇, ＇ Jinling Yangguang＇ and ＇ Jinling Jiaohuang＇ planted in 288-cave plug decreased significantly at P=0.05 level compared to those planted in the other plugs of lesser caves. Root length and root fresh weight overall increased with 500：-750 mg＇L-t NAA. In addition, rooting a- bility decreased after 42 d cold storage, hower ere, there is no significant difference between 42 d cold storage and control in ＇Jinling Huangguan＇ and ＇Jinling Jiaohuang＇cultivars. The root number of ＇Jinling Yangguang＇ increased significantly at P=0.01 level after 42 d cold storage. However, maximum root length of Jinling Yangguang＇ increased significantly at P=0.05 level after 14 d cold storage. The present study will do aid to the seedling production of these newly bred cuhivars. [Ch, 4 tab. 8 ref. ]