Studies On Cutting Propagation Technology And Rooting Mechanism Of Cytisus

Cytisus is important and multipurpose plant, includes view, medicinal and landscape value,with unique ornamental value.This article studys on cutting propagation technology and rootingmechanism, The main results as follows:（1） In hard-wood cutting completely random test, IAA900mg/L had the highest rooting rate,it was87.8%; NAA₂00mg/L had the most average plant rooting number, it was13.48; meanwile,NAA₂00mg/L had the longest total root length, it was73.74mm. Form the rooting dynamic time,GGR600mg/L had the fastest rooting rate, emerge cullusing in5days, in9days appearsadventitious root formation, in15days appears abundant adventitious root formation, ahead of6days compare to check.（2） In hard-wood cutting orthogonal test, treatment2（A₁B₂C₂D₂） had the highest rooting rate,reached79.97%; treatment5（A₂B₂C₃D₁） had the highest rooting effect indexes, reached3.09. Insoft-wood cutting orthogonal test, treatment2（A₁B₂C₂） had the highest rooting rate, reached57.78%; and had the highest rooting effect indexes, reached1.96.（3） Nutrient substance changed with the times of rooting process. solube sugar present“rise-descend-rise” variation tendency; amylum present “descend-rise” variation tendency;solube protein present “rise-descend” variation tendency.（4） Enzyme had close connection with cottage. SOD present “rise-descend” variationtendency; POD present “rise-descend-rise” variation tendency; and PPO present “rise-descend”variation tendency.（5） IAA, ABA and ZR had different change rules during rooting process. Compare of IAApresent “rise-descend” variation tendency, treatment present “rise-descend-rise” variationtendency; ABA present “descend-rise-descend” variation tendency; compare of ZR has one peak,but treatment has two. In emerge cullusing and adventitious root formation period, IAA/ABAwas increasing; in emerge cullusing, adventitious root formation and abundant adventitious rootformation period, IAA/ZR was increasing.