试论福建省桉树人工林的生态问题及其对策
Ecological defects and countermeasures of Eucalyptus plantation in Fujian Province
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摘要: 针对近几年福建省桉树人工林迅猛发展的趋势, 论述了福建省桉树人工林存在的生态问题, 并结合笔者多年对桉树人工林的定位调查和研究成果, 认为桉树人工林生态问题产生的根本原因不在桉树本身的生物学特性, 而是目前生产经营者采取的不尽合理的栽培制度及经营管理措施。因此, 亟需制定一套能够提高桉树人工林生态稳定性的科学合理栽培制度, 包括: 选择合适树种, 优化林分结构和树种结构; 推广不炼山的林地清理方式, 降低整地强度; 保留采伐剩余物, 科学施肥; 选择科学合理的经营密度和轮伐期。Abstract: Based on the rapid trend of development of Eucalyptus plantations in Fujian Province in recent years, ecological problems of Eucalyptus plantation were investigated. The results of the study, in combination with long-term investigation on Eucalyptus plantation at our field research station, show that ecological defects in the region are not merely due to the biology characteristic of Eucalyptus but are rather driven by undesirable cultural system and management practices. There is therefore an urgent need to draft out a set of feasible cultural systems for improving ecological stabilization of Eucalyptus plantations. Such systems should include choosing suitable tree species, optimizing stand and tree species structure; disseminating methods of controlled burning cutting- blank and limiting soil preparation practices. Restricting residuum logging, scientific fertilization, adopting sound management density and rotation felling are equally very important.