不同保鲜剂对唐菖蒲鲜切花水分平衡和鲜重的影响

筛选唐菖蒲鲜切花合适的保鲜剂。用不同浓度的蔗糖、硫酸铝、柠檬酸、硝酸银处理唐菖蒲,测定切花的鲜重变化率、观赏值及瓶插寿命。不同的保鲜剂及同种保鲜剂的不同浓度对唐菖蒲切花的水分平衡值和鲜重均有不同的影响。200mg/L硫酸铝、500mg/L柠檬酸保鲜效果最好,切花的瓶插寿命均为5d,比对照延长1d。各处理的水分平衡值变化趋势与对照相似,总的趋势是下降的。瓶插前期的水分平衡值大于1,而后期的水分平衡值小于1。除2%蔗糖处理的唐菖蒲鲜重值变化率呈下降趋势外,其他处理总体上均呈先升后降趋势。瓶插结束时,花枝鲜重明显低于初始鲜重。低浓度蔗糖溶液对唐菖蒲切花保鲜效果明显。综合考虑,500mg/L柠檬酸和250mg/L硫酸铝具有最佳的保鲜效果。

Effects of Different Fresh-keeping Agents on the Water Balance and Fresh Weight of Fresh Cut Flowers of Gladiolus hybridus

The aim of the research was to screen out the suitable fresh-keeping agent for fresh cut flowers of Gladiolus hybridus.G.hybridus was treated with different concentrations of sucrose,aluminum sulfate,citric acid and silver nitrate to determine the fresh weight dynamic,ornamental value and the vase life of cut flowers.Different fresh-keeping agents and different concentrations of the same kind of fresh-keeping agent all had different effects on the water balance value and fresh weight of G.hybridus cut flowers.The fresh-keeping effects of 200 mg/L aluminum sulfate and 500 mg/L citric acid were best.And their vase lives of cut flowers were both 5 d,which were prolonged 1 d than CK.The change tendency of water balance values in all treatments was similar to that of CK and the whole tendency was decreasing.The water balance values in early vase stage of were more than 1 and that in late stage were less than 1.Except that the fresh weight changing rate of G.hybridus treated with 2% sucrose showed a decreasing trend,that in other treatments all showed a trend of first increasing and then decreasing.When vase holding was ended,fresh weight of flower branches was obviously lower than the initial fresh weight.The fresh-keeping effect of sucrose solution with low concentration is obvious.Considering comprehensively,200 mg/L aluminum sulfate and 500 mg/L citric acid can get best fresh-keeping effects.