尿素IBA和羊粪对苹果幼树新根的诱导与调控-中国农业科学.PDF

　2001, 34( 1): 1- 4 Scie tia Ag ricultura Si ica　　　 、 IBA 杨洪强,接玉玲,黄天栋,束怀瑞 (, 　271018) : 以新植苹果( M alus p um ila Mill /M alus hup en ensis Rhed)幼树为材料,研究了植物生长物质和肥料 果树 新根(吸收根和延长根)的诱导效应。 结果表明,尿素、 IBA和羊粪不论单用与合用均增加新根总数、提高根系活力、改 变吸收根 /延长根数量比值。其中尿素主要增加延长根数量,降低根 /冠比。 明显促进延长根加长生长,提高根/冠 IBA 比。羊粪主要增加吸收根数量,提高吸收根 /延长根数量比值,使新根分枝增多、鲜重增加、延长根加粗。尿素与羊粪合 用,增加根鲜重但降低根/冠比值。 IBA与羊粪合用提高吸收根 /延长根数量比值,增加根鲜重 ,但 根 /冠比值没有明 显影响, 因而地上地下生长均衡。 : 尿素; IBA;羊粪;苹果;根系 : S661. 1; S606. 2　: A　: 0578-1752(2001) 01-0051-05 The Induct ion of Root Format ion by Urea , IBA and Sheep Dung in Young Apple Tree - , - , - , - YAN G Ho g qia g JIE Yu li g HU ANG Tia do g S HU Huai rui ( Hor ticu lture Dep ar tm ent of S hand ong A g r icu lture Un iv ersity , Ta ian　271018 ) Abstract: The effect of pla t growth substa ce a d fertilizer o root formatio w as studied i ew pla ted apple tree( Mal us p um ila Mill / Mal us hup en ensis Rhed). The results i dicated that urea a d IBA a d sheep du g all i creased the total umber a d activity of ew roots a d cha ged the ratio of absorbi g . root to exte sive root obviously Urea i creaced the umber of exte sive root a d decreased the ratio of root to shoot mostly. IBA le gth e ed the exte sive root a d i creased the ratio of root to shoot obviously. Sheep du g i creased the umber of absorbi g root a d i creased the ratio of absorbi g root to exte sive , , . root divided ew root i to ma y bra ches i creased the fresh w eight of root a d thiche exte sive root The fresh w