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为了找出最适宜于越南中部山区、预期综合环境效益最佳的、更利于生态平衡的农林复合模式,该研究以越南和平水电站库区4种主要农林复合模式:马占相思树(Acacia mangium)-玉米(Zea mays)、马占相思树-木薯(Manihot esculenta crantz)、赤桉树(Eucalyptus camandulensis)-旱稻(Oraza sativa)和马占相思树-木薯-玉米为研究对象,采用盖度、土壤理化性质、土壤蓄水能力、水土保持能力等指标进行环境效益的比较,最后得出的结论为:在4种农林复合模式中,马占相思树-木薯-玉米复合模式具有最高的水土保持效益和综合环境效益;赤桉树-旱稻复合模式的水土保持效益和综合环境效益均最低;实践中应该增加前者的种植面积,限制和减小后者的种植面积。在马占相思树-木薯-玉米复合模式的基础上加以改进,提出了预期综合环境效益更好的马占相思树-木薯-玉米-肉桂(Cinnamomum cassia)复合模式,为农林复合系统在和平水电站库区的应用提供更好的选择,同时也为世界上有类似气候环境条件的地区农林复合模式的采用提供参考。
In order to find out the agroforestry model which is most suitable for the mountainous area in central Vietnam and is expected to have the best comprehensive environmental benefit and is more eco-balanced, this study took four major agroforestry models of the Heping Hydropower Station: Acacia mangium, - Zea mays, Manihot esculenta crantz, Eucalyptus camandulensis - Oraza sativa and Acacia mangos - cassava - maize were selected as the study object, and cover, soil physiochemical The results showed that among the four agroforestry models, Acacia mangium-cassava-maize composite model had the highest soil and water conservation benefits and the highest soil and water conservation efficiency Comprehensive environmental benefits; Eucalyptus - Upland rice composite model of soil and water conservation benefits and the overall environmental benefits are the lowest; practice should increase the former acreage, limit and reduce the latter acreage. Based on the composite model of Acacia mangium-cassava-maize, the composite model of Cinnamomum cassia, which is expected to have better comprehensive environmental benefits, The application of the reservoir area provides a better choice and also provides a reference for the adoption of the agroforestry model in the world with similar climatic and environmental conditions.