植物生長調節劑及修剪對香椿生育之影響

Effect of Plant Growth Regulators and Pruning on Growth of Chinese Mahogany

蘇炳鐸(Bing-Dwo Su) ； 黃明得(Ming-Teh Huang)

《臺東區農業改良場研究彙報》 14輯 (2003/12) Pp. 39-48

https://doi.org/10.6959/RBTDAIS.200312.0039

摘要

本試驗旨在探討香椿利用扦插及修剪方式，對其種苗繁殖及幼嫩葉片採收產量之影響，以達到經濟栽培目的。在5種不同藥劑處理下，以NAA 4000ppm粉劑處理者，對插穗之複葉、羽狀小葉片長度，以及複葉數有促進作用；插穗萌芽率為16%，其他處理則低於10%。NAA同時也對扦插苗之發根數及根長度有顯著增進作用，插穗成活率較以IBA等處理者為高。不同藥劑處理對香椿扦插枝之萌芽數並無顯著影響。修剪方式對香椿發育之影響較密植方式為大。以當年三月修剪一次的方式處理，能產生最長之嫩葉長度，植株嫩芽產量最高。以當年三月、六月及九月分別修剪方式處理，植株萌芽速度快，萌芽數最多，但其葉片長度，芽體長度亦最小。以當年三月及六月分別修剪處理者與三月、六月及九月分別修剪處理者比較，二者在萌芽數、複葉長度，以及小羽狀葉片之長度、寬度上並無顯著差異存在，惟在產量上以三月、六月及九月分別修剪處理者較高。

關鍵字

香椿 ； 植物生長調節劑 ； 扦插 ； 修剪

並列摘要

The influence of plant growth regulators on cuttings growth and annual pruning times on paripinnate leaf yield of Chinese mahogany (Cedrela sinensis Juss.) under field condition were investigated in this experiments.The cuttings of Chinese mahogany were treated with mancozeb 80% powder, NAA 4000ppm (powder), IBA 4000ppm (liquid), and IBA 5000ppm (powder). It resulted that NAA had the best effect on increasing leaf number and leaflet length and promoting leaf numbers on cuttings. The sprouting rate of lateral buds on cuttings treated with NAA was 16%, and others were below 10%. The rooting number and length of cutting were also significantly induced by NAA treatment. Besides, it had no obviously effect on sprouting numbers of cuttings in all these treatments.To change the pruning months appeared greater benefits than to be the dense planting in Chinese mahogany. The edible paripinnate leaf length and yield from the shoots pruned only in March had been promoted than that pruned in other months. However, when plants were pruned in March, June, and September, it got the most sprouting numbers and the minimum leaf and budding length during the year. To compare the different pruning methods, pruned in March to June with pruned in March to September, more edible paripinnate leaf yield occurred pruned in March to September than the other. There were not significantly different in these two methods in shoot sprouting numbers, leaf length, and the length and width of paripinnate leaf.

並列關鍵字

Chinese mahogany ； Plant growth regulators ； Pruning ； Cutting