Silvicultural contributions towards sustainable management and conservation of forest resources in the highlands of Ethiopia

开展了一个造林项目，以设计可持续森林管理战略，利用埃塞俄比亚高地的森林资源。虽然天然林严重退化，但种植园林管理不当。进行了两个实验，一个在天然林和人工林。作为恢复退化的天然林的一项措施，进行了富集种植。在退化森林的空隙中种植了具有重要经济价值的土著物种。生存和增长是不同的物种，干旱和草食动物有影响的年轻的种植。经过两年调查的第一个结果表明，本地物种的富集种植的潜力。在种植园林中，不同的经营方案，包括不同的间伐强度和不同的保护措施，对牲畜的不同年龄级的3个主要种植园林进行了处理。对成熟林分、地面植被和更新进行了深入调查，获得了较为全面的数据。造林处理对成熟林分和更新的影响的初步结果是有希望的。然而，长期的调查是必不可少的，以得出有效的结论，进一步增长的人工林和成功/失败的富集种植恢复退化的天然林。出版物中的进一步分析和结果将为可持续管理和恢复埃塞俄比亚高原森林的建议提供科学依据。

A silvicultural project was conducted to design sustainable forest management strategy for the utilization of forest resources in the highlands of Ethiopia. While the natural forest is heavily degraded, plantation forests are inappropriately managed. Two experiments were conducted, one in the natural forest and the other in plantations. Enrichment plantings were undertaken as a measure to restore degraded natural forests. Ecologically and economically important indigenous species were planted in gaps of the degraded forests. Survival and growth were different among species, as draught and herbivory had an impact on the young plantings. First results after two-investigation years indicated the potential of enrichment plantings by native species. In plantation forests, different management options involving silviculture treatments with different thinning intensity and different protection variants against livestock were conducted in different age classes of three dominant plantation forests. Mature stand, ground vegetation and regeneration were in depth investigated and a comprehensive data is available. First results of the impact of the silvicultural treatments on mature stands and regeneration were promising. However, longer-term investigation is indispensable to draw valid conclusions about the further growth of the plantations and the success/failure of the enrichment plantings to restore degraded natural forests. Further analyses and results set in publications will provide scientific bases for recommendations on the sustainable management and restoration of the Ethiopian highland forests.