马尾松闽粤栲异龄复层混交林的林分特征及涵养水源能力

为探讨马尾松林套种闽粤栲后形成的异龄复层混交林的林分特征和固土保水能力,恢复与建立针阔异龄复层混交林,培育马尾松大径材,揭示马尾松与闽粤栲异龄复层混交林的林分特征、土壤肥力、涵养水源功能及林内物种多样性,以闽粤栲、马尾松人工纯林为对照,测定了异龄复层混交林中各林木生长状况、林分各层的生物量、土壤的物理化学性质及涵养水源能力。结果表明:马尾松林内套种闽粤栲,上层林马尾松保留密度为450~600株/hm~2建立的异龄复层混交林林分各林木生长良好,提高了林木生长量得到提高,土壤肥力得到得以改善,林分的固土保水能力提高。总结出马尾松林套种闽粤栲的更新技术,为马尾松纯林改造与经营管理、指导针阔异龄复层混交林培育和马尾松大径材培育提供科学依据。

Stand Characteristics and Water Conservation Capacity of Pinus massoniana and Castanopsis fissa Mixed Plantation

In order to explore the stand characteristics and soil and water conservation capacity of Pinus massoniana interplanting Castanopsis fissa plantations with different ages, a coniferous and broad-leaved mixed plantation with varies ages was restored and established at large-diameter timber cultivations.This plantation was used for revealing soil fertility, water conservation function and bio-diversity in C.fissa and P.massoniana mixed plantations.The pure C.fissa plantation and pure P.massoniana plantation was used as control treatment.Growth characters, biomass of different layers in the plantation, soil physical and chemical properties and water conservation capacity were measured, respectively.The tree growth of both P.massoniana and C.fissa was increased in the mixed plantation with upper layer of P.massoniana density of 450-600ind./hm2 than that in the control.The soil fertility was improved, and soil and water conservation capacity was enhanced.Stand renewal technology of P.massoniana mixed with C.fissa was established.This update technology can guide the transformation and management of pure P.massoniana plantation, and silviculture of coniferous and broad-leaved mixed plantation cultivation of different ages as well as large diameter timber cultivations.