不同藥劑塗布對櫸木修枝傷口變色與腐朽之效應

Effects of Different Chemical Dressings on Wound Areas of Pruned Taiwan Zelkova (Zelkova serrata Hay.) Trees Against Discoloration and Decay

邱志明(Chih-Ming Chiu) ； 林振榮(Cheng-Jung Lin) ； 唐盛林(Sheng-Lin Tang) ； 湯適謙(Shyh-Chian Tang) ； 羅卓振南(Chen-Nan Locho)

《台灣林業科學》 19卷3期 (2004/09) Pp. 177-186

https://doi.org/10.7075/TJFS.200409.0177

摘要

櫸木人工林在13年時，進行不同枝徑之修枝，隨後並以油漆、透明漆、CCA防腐劑作傷口塗布，未塗布為對照組。22年生時，解析塗布之傷口，觀測其癒合，變色及腐朽發生情形。結果顯示：2cm以下傷口直徑傷口均可完全癒合，而變色、腐朽發生機率亦很低，故不需塗布。修枝傷口之變色、腐朽最先發生在修枝傷口，當傷口超過3cm以上時，無法在短期間癒合，變色菌、腐朽菌等微生物即會入侵，使材色變濃，然後向傷口上、下兩側擴展，一般向下蔓延速度比向上快。林木枝徑若超過6cm以上時，變色和腐朽發生百分比及面積均會急速增大，亦即傷口直徑和變色面積或腐朽面積呈二次曲線之關係，因此不應修枝；若修枝，縱使傷口進行藥劑塗布，效果仍然有限。而在傷口直徑2~5cm間，傷口塗布對傷口癒合、變色及腐朽之防止有其效果，其中以油漆最佳，其次為透明漆及防腐劑，未塗布效果最差。

關鍵字

櫸木 ； 修枝傷口 ； 藥劑塗布

並列摘要

Pruning of different branch diameters was practiced in a 13-yr-old Taiwan Zelkova plantation, and then the pruned wound areas were coated with oil paint, lacquer, or CCA preservations or left untreated. The degrees of healing, discoloration, and decay on pruned wounds were examined 9 yr later. Results showed that pruned wounds smaller than 2cm in diameter with no coating healed well, because discoloration and wood decay seldom occurred. Wood-staining or wood-rotting fungi invaded first into the pruned wound areas with diameters greater than 3cm, which caused pruned wound discoloration and then extended to both sides of the wound. In general, fungal invasion extended downwardly more quickly than upwardly, and it ultimately resulted in wood decay. The occurrence percentage and area of discoloration and decay for wound diameters greater than 6cm increased rapidly. The relationship between discoloration area and wound diameter followed a second-order polynomial curve, which indicated that pruning should not be carried out. However, dressing treatments on wound diameters of 2~5cm were effective for wound occlusion and as protection against discoloration and decay. Among them, oil paint was the best selection for treatment, followed by lacquer and CCA preservative next, with uncoated treatment the last.

並列關鍵字

Zelkova serrata ； pruned wound ； chemical dressings