伐採月份對麻竹及桂竹抗蟲性之影響

Effect of Felling Season on the Insect Resistance of Maso and Makino Bamboo

張誌仁(Chih-Jen Chang) ； 張豐吉(Feng-Jyi Chang) ； 杜明宏(Ming-Homg Duh)

《林產工業》 23卷2期 (2004/06) Pp. 157-166

https://doi.org/10.6561/FPI.2004.23(2).7

摘要

本研究之目的在探討竹材伐採月份對其抽出物、澱粉含量與蟲害抵抗性之相關性。研究結果顯示麻竹與桂竹之抽出物及澱粉含量均具季節性之變化，而此變化隨勢受其發筍等生理現象影響，但由於麻竹與桂竹之發筍期不同，故兩種竹材抽出物及澱粉含量之高峰期也有所不同。竹材澱粉含量與蟲害程度有密切關係，不同竹種之間，麻竹因澱粉含量達高於桂竹，因此抗蟲性不如桂竹甚多。麻竹2～9月澱粉含量較高且多集中於竹桿中部；桂竹於1～2月及4～7月之澱粉含量偏高且以梢部之含量較多，這些月份的竹材受蟲害情形均較其他月份為嚴重。故為獲得較高天然抗蟲性之竹材，竹材伐探時應避開澱粉含量較高之月份。

關鍵字

澱粉含量 ； 抗蟲性 ； 發筍期

並列摘要

The main purpose of this study was to investigate the relationship between extractives, starch content and the insect resistance property of bamboo. The results showed that the extractives and starch contents of Ma bamboo and Makino bamboo both changed by season. The change trend was dependent upon the physiology phenomena of bamboo such as shooting period. The high seasons of extractives and starch content of the two species of bamboo were different due to different shooting period. The insect resistance property of bamboo was closely related to its starch content. Ma bamboo showed less insect-resistant than Makino bamboo due to its higher starch content. Ma bamboo felled from February to September, especially the middle stem were higher in starch contents than felled in other months. In the case of Makino bamboo, top stems felled in January February and from April to July showed higher starch content than felled in other months. All these bamboo specimen having higher starch content were poor in insect resistance. In order to get bamboo raw material with higher natural insect resistance, it was recommended not to fell bamboo in those months with higher starch content.

並列關鍵字

Starch content ； Insect resistance Shooting period