節位、穴盤規格與養分對菊花插穗發根之影響

Influence of Nodes, Trays and Nutrition on Rooting of Chrysanthemum Cutting

本試驗係摘取不同菊花節位枝條作為插穗種植於128格、240格入432格（60×40×3.5公分）寶麗龍穴盤內，並給予不同濃度氮、磷、鉀肥及不同型態氮肥，種植28天後觀察菊花插穗根系發育情形。結果顯示摘取菊花各節位枝條作為插穗均具良好發根能力。頂芽插穗在穴盤內前21天除432格穴盤根系生長量較低外，其餘2種穴盤差異不顯著，至第28天時呈現明顯穴盤效應，即插穗種植大格（128格）穴盤內根系生長量高，種植小格（432格）穴盤內根系生長量低。施肥效果方面以每週澆施2次氮：磷：鉀＝224:124:468ppm濃度對於插穗根系發育較佳。將氮肥濃度固定為224ppm，分別給予不同比例之NO3（上標 -）-N/NH4（上標 +）-N/Urea-N時，以1:1:1之組合可獲得較高根重，提高NO3（上標 -）-N的比例無法增加根重。

In this study, chrysanthemum cuttings from different nodules were grown in 128 cells, 240 cells, 432 cells trays (60×40×3.5cm) and fertilized with nutrient solutions containing different sources. To study the rooting of cuttings in trays until 28 days of planting. Root growth of cuttings was all well for different nodes. Root fresh weight of top cuttings in big tray (128 cells) was higher than that of small tray (432 cells) in the fourth week, We observed best growth of chrysanthemum when the fertilizer was treated N:P:K=224:124:468ppm 2 times a week. The cuttings fertilized: with NO3(superscript -)NH4(superscript +):Urea=1:1:1 medium exhibited higher root fresh weight than others.