不同氮磷钾水平对枫叶秋海棠观赏性状的影响

Effects of Different Nitrogen,Phosphorus and Potassium Levels on Ornamental Characters of Begonia dregei var.macbethii

以具膨大茎基的枫叶秋海棠为试验材料,通过温室盆栽试验,考察不同氮磷钾水平对枫叶秋海棠观赏性状(茎基直径、生物量、株高、分枝数和开花数等)的影响,以期为枫叶秋海棠规范化栽培与生产的合理施肥提供理论依据。结果表明,与标准浓度NPK处理相比,缺氮、缺磷处理下枫叶秋海棠生长和各观赏性状指标均显著降低;提高氮、磷水平对枫叶秋海棠的茎基直径、茎基和地上部分生物量、株高、分枝数和开花数均有不同程度的促进作用,其中2NPK处理下,枫叶秋海棠的茎基直径、茎基生物量和开花数量等各项生长指标均高于其他处理。综上所述,不同氮磷钾水平对枫叶秋海棠观赏性状影响显著,在保证磷素供应的基础上提高氮素供给水平对维持枫叶秋海棠的健康生长和良好的观赏形态尤为重要。

The effects of nitrogen,phosphorus,and potassium on the ornamental characters(caudex diameter and biomass,plant height,number of branches and flowers)of Begonia dregei var.macbethii were investigated via a pot experiment in the greenhouse.The results showed that compared with the standard concentration NPK treatment,the growth and ornamental traits of Begonia dregei var.macbethii were significantly decreased under nitrogen and phosphorus deficiency treatment.Increasing N and P levels could promote the caudex diameter and biomass of caudex and above-ground part,plant height,branch number,and flowering number of Begonia dregei var.macbethii to varying degrees.The growth indexes of caudex diameter,caudex biomass,and flowering number of Begonia dregei var.macbethii under 2NPK treatment were higher than those under other treatments.In conclusion,different nitrogen,phosphorus,and potassium levels significantly affected the ornamental traits of Begonia dregei var.macbethii.To maintain the healthy growth and good ornamental morphology of Begonia dregei var.macbethii,higher nitrogen and essential phosphorus were needed.