Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/81579
標題: 穴格構型改善甘藍種苗盤根及其生育之研究
Studies on Plug Cell Modification for the Improvement of Root Bounding and Growth of Cabbage(Brassica oleracea L. var. capitata L. ) Seedlings
作者: 黃玉梅
Yu-Mei Huang
李文汕
張武男
Wen Shann Lee
Woo-Nang Chang
關鍵字: Plug;盤根;Root bounding;Cabbage;甘藍;穴格構型
Project: 興大園藝, Volume 23, Issue 2, Page(s) 63-76.
Horticulture NCHU, Volume 23, Issue 2, Page(s) 63-76.
摘要: 
方型或圓型穴盤經改變穴格構型後均具有減少甘藍種苗盤根之效果,根群在方型側壁漏空處理穴格中,當根尖生長至漏空部份後,根會沿著漏空處向下生長,具導根效果,部份根尖在接觸空氣後停止生長,刺激支根產生。在去底處理穴格中根生長至底部時,根尖停止生長,無法形成盤根同時可促使支根產生。圓型穴格雖較方型易產生纏繞根,但經穴格構型改變後仍有改善現象,其中側壁漏空處理穴格同樣可避免根沿著穴格側壁盤繞,而底部U型設計雖可減少根在底部纏繞的機會。幼苗根尖數目亦因穴格構型處理而提高,側壁漏空之方型穴格所培育的甘藍四週齡苗根尖數較未處理穴格多159%,去底處理亦提高151%,而圓型穴格則以側壁漏空處理較未處理穴格多178%最顯著。定植後由改良穴格所培育之甘藍種苗因苗期穴格的導根及空氣斷根作用根系直接生長,定植後10天根尖數方型以完全去底最多,漏空處理次之,圓型以漏空處理穴格最多對照組最少,且苗株定植後相對生長速率亦顯著高於未處理組。定植後經改良構型穴格所培育甘藍苗葉球收穫量亦顯著高於未處理穴格。

Modification of both inverse pyramid and cone shape plug cells had the effect of improving root bounding in cabbage seedlings. For Inverse pyramid cells, vertical narrow openings on each sidewall (T-A-4)had the effects of root pruning, so as to increase root branching. The side opening could also direct the root growth of the seedlings to the bottom of plug cells. More branch roots and no root bounding were observed on seedling in de-bottomed plug cells. The reason for this positive result was postulated to b4 air pruning effect of cell modification. Although more severe root bounding problem has been observed in cone shape than in inverse pyramid plug cells, modification of plug cell either by vertical opening (R-A-3) or by U-shape cutting at the bottom (R-U) could significantly improve the phenomenon of root bounding. Results indicated that, seedlings in inverse pyramid plug cells with R-A-3 and R-U treatments had 159% and 151% more root tips than controls, respectively; while seedlings in cone shape plug cells with R-A-3 treatment had 178% more root tips than control. The post effect of plug cell modification was also observed on seedlings after transplanting. As the root tip number counted at 10 days after transplanting was found being the highest on plants from de-bottomed cells, which was followed by T-A-4, and the control set was the lowest. It was believed that the increase in root tip number of seedlings from modified plug cells was mainly due to the air pruning effect. When compared to control, all of the modifications on plug cell had the effects of increased fresh weight per head and increased yields.
URI: http://hdl.handle.net/11455/81579
ISSN: 0255-5921
Appears in Collections:第23卷 第02期
園藝學系

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