修剪節位與時期對迷你玫瑰盆花品質之影響

Effect of Pruning Position and Timing on the Quality of Potted Miniature Roses

本研究以迷你玫瑰'Lavender Jewel'和'Orangs Sunblaze'為材料，利用不同修剪方式，促進植株分枝，使盆花在短期內即具有較好的品質。即樹冠投影面積（CSA）大於理想樹冠標准值（TSCSA），而且植株較矮且有較多的枝條和花。在冬季栽培時'Lavender Jewel'經下列修剪方法，品質較好。1.植株先經鱗剪（剪除所有鱗片葉），然後在第二個花期時中剪（留二節伸長的節間）。2.兩次花期都經中剪。3.植株先經低剪（所有伸長的節間剪除），再經高剪（只剪除最上二片葉）。在春季栽培時，二次花期都用中剪，品質最好。'Orange Sunblaze'，在冬季栽培時，植株宜先經高剪，再經中剪或低剪。在春季栽培時，則先經中剪再經高剪。中剪的時機在'Lavender Jewel'以在第三個伸長節間形成時摘心，可促進分枝。而'Orange Sunblaze'在花萼反卷時中剪，可得最大的CSA。

Potted miniature roses 'Lavender Jewel' and 'Orange Sunblaze' were pruned by different ways for enhancing to have better quality quickly. That mans the canopy shading area (CSA) was greater than the theoretical standard of canopy shading area (TSCSA), and the dwarfer plant had more shoots and flowers in short time. In winter, the following pruning methods on 'Lavender Jewel' got better quality, 1. Plant was pruned at the position where scale leaves were cut (Scale cut) at the first flower flower flush and at the position where two elongating internodes left (middle cut) was pruned at the second flower flush. 2. Plant was done middle cut two times. 3. Plant was pruned at the position where all elongating internodes were cut (low cut) first, in the following at the position where the upper two leaves were cut (high cut). In spring, two times of middle cut was the best pruning. On 'Orange Sunblaze', in winter, plant done a high cut first, and followed by a middle cut or low cut got better quality. In spring, plant done a middle cut first and a high cut in the following got the best quality. To do a middle cut, by pinching 'Lavender Jewel' when the third internode developed enhanced branching. On 'Orange Sunblaze' to prune at middle position when calyx unfolded got more CSA.