CAJ | 학술논문

马尾松（Pinus massoniana）是中国南方大面积造林的树种，也是抗火能力最弱的树种。研究了广西苍梧11龄马尾松用材林和4龄大叶栎萌芽林在正常冬季和干旱夏季情景下的火行为，用behaveplus 计算了火线强度、蔓延速度、树冠火可能性等参数。结果表明，两种林分在干旱夏季的火行为高于在正常冬季的火行为。无论是在正常冬季还是在干旱夏季，都没有出现马尾松可燃物模型的火行为一致高于大叶栎可燃物模型的情况；天气、地形、可燃物床结构对可燃物含水率有很大影响，而含水率是火行为的决定因素。虽然大叶栎被划分为难燃树种，大叶栎萌芽林的火行为高于成年大叶栎乔木林，苍梧大叶栎萌芽林在极端干旱的夏季情景有被火把点燃的可能性。如果将大叶栎萌芽林作为防火林带使用，需要经常清除林下枯枝落叶，割除黑莎草，减少细小可燃物。
마미송（Pinus massoniana）시중국남방대면적조림적수충，야시항화능력최약적수충。연구료엄서창오11령마미송용재림화4령대협력맹아림재정상동계화간한하계정경하적화행위，용behaveplus 계산료화선강도、만연속도、수관화가능성등삼수。결과표명，량충림분재간한하계적화행위고우재정상동계적화행위。무론시재정상동계환시재간한하계，도몰유출현마미송가연물모형적화행위일치고우대협력가연물모형적정황；천기、지형、가연물상결구대가연물함수솔유흔대영향，이함수솔시화행위적결정인소。수연대협력피화분위난연수충，대협력맹아림적화행위고우성년대협력교목림，창오대협력맹아림재겁단간한적하계정경유피화파점연적가능성。여과장대협력맹아림작위방화림대사용，수요경상청제림하고지락협，할제흑사초，감소세소가연물。
Pinus massoniana is a tree species widely used for afforestation in southern China ,and one most flammable and weakly resistant to fire . Eleven‐yr‐old P . massoniana plantations and 4‐yr‐old Castanopsis f issa coppices on different topographies were investigated and fuel models were developed by BehavePlus 5 .0 to evaluate their fire potential in normal winter and summer drought moisture scenarios ,comparing their fireline intensity ,rate of spread and crown fire possibilities . The result showed that fire potential was higher in summer drought than in normal winter .However ,neither in normal winter nor in summer drought ,fire behavior of pine fuel models was consistently higher than that of C . f issa fuel models ;and weather ,topography ,fuelbed composition contributed heavily on fuel moistures which always were dominating factors for fire behaviors .Although C . f issa was classified as nonflammable tree species ,its coppices were more flammable than its mature arbor forests ;and the coppices in Cangwu were possible to be ignited by brands in extreme summer drought .If the C . f issa coppices are used as firebreak belt forest ,understory dead fuels ,herbs and other fine fuels should be treated regularly .