【摘要】 [目的]探讨桂南地区林分改造后4个乡土阔叶树种的生长规律和木材性质，为乡土阔叶树种人工林可持续经营提供依据。[方法]以20年生米老排(Mytilaria laosensis)、观光木(Michelia odora)、红锥(Castanopsis hystrix)和西南桦(Betula alnoides)4个乡土阔叶树种为研究对象，采用树干解析法测定不同林龄各树种胸径、树高和单株材积的生长规律及木材性质。[结果](1)20年生不同阔叶树种胸径和单株材积总生长量的排序为：米老排>红锥>观光木>西南桦，树高总生长量的排序则为：米老排>观光木>红锥>西南桦。米老排和红锥胸径连年生长量在不同林龄波动较大，并在中后期表现出显著的材积生长优势；观光木的胸径和树高平均生长量在中后期平缓上升；西南桦的材积生长在接近18 a时达数量成熟。(2)红锥的木材气干密度最大，米老排的木材顺纹抗压强度最高，而观光木的木材顺纹抗压强度显著低于其他树种(P<0.05)。[结论]结合4个乡土阔叶树种的生长规律及木材性质，米老排和红锥适合作为大径材培育树种，观光木建议作为前期造林树种，而西南桦适合作为中短期用材树种。生产上，建议根据各树种的生长表现采取不同的营林策略。更多还原

【Abstract】 [Purpose] This study investigated the growth patterns and wood properties of four indigenous broadleaf tree species following stand improvement in Southern Guangxi, aiming to provide a basis for the sustainable management of indigenous broadleaf plantations. [Method] Four 20-year-old indigenous broadleaf tree species of Mytilaria laosensis, Michelia odora, Castanopsis hystrix, and Betula alnoides were studied. Stem analysis was employed to determine the growth patterns of diameter at breast height(DBH), tree height, and individual timber volume and wood properties across different stand ages. [Result](1) At 20 years of age, the total increments in DBH and individual timber volume followed the trend of Mytilaria laosensis>C.hystrix>Michelia odora>B.alnoides, while that in tree height was in descending order of Mytilaria laosensis>Michelia odora>C.hystrix>B.alnoides. The current annual increment in DBH of Mytilaria laosensis and C.hystrix fluctuated considerably across ages, with both species demonstrating advantages in timber volume growth during the mid-to-late stages. The mean annual increments in DBH and tree height of Michelia odora increased gradually in the mid-to-late stages. B.alnoides reached quantitative maturity in timber volume growth near 18 years.(2) C.hystrix exhibited the highest air-dry density, while Mytilaria laosensis had the highest compressive strength parallel to grain. Michelia odora showed lower compressive strength parallel to grain than the other species(P<0.05). [Conclusion] The comprehensive comparison of growth patterns and wood properties among the four indigenous broadleaf tree species suggests that Mytilaria laosensis and C.hystrix are suitable for large-diameter timber production, Michelia odora for early-stage afforestation, and B.alnoides for short-to-medium rotation timber production. In production, silvicultural practices should be adopted according to the specific growth performance of each species.更多还原