桉树林对水库蓄水量及水质影响的调查研究

Effect of Eucalyptus Plantation on Water Storage and Quality of Reservoir

大面积集中连片的桉树(Eucalyptus spp.)种植模式,引起社会质疑桉树影响下游水库水量与水质。为了解水库集水区桉树林对水库蓄水量和水质的影响,本研究通过实地考察、数据收集和水样化验的方法,对南宁市、巴马县和柳江县的4个水库的集水区桉树林发展情况、水库蓄水量和水库水质进行分析。结果表明,水库入库量与当年降水量密切相关,而蓄水量主要受出库量的影响;水库水中的氮素富集降低水质主要与养殖和其他人为活动有关,而受桉树林的影响不显著。本研究提出了减少桉树人工林经营的生态问题和促进桉树与环境可持续发展的建议。

The effect of Eucalyptus plantation on water storage and quality of downstream would be questioned becauseEucalyptus plantation was planted in large areas.To understand the impact of Eucalyptus plantation on water storage and quality of reservoir watershed,the Eucalyptus plantation development,water storage and quality were analyzed in four reservoir watersheds of Nanning,Bama and Liujiang region with the methods of field investigation,data collection and test of water samples.Results suggested that reservoir intake was closely related with current precipitation,and reservoir water storage was mainly influenced by water output.The nitrogen enrichment in reservoir water was mainly related to the aquaculture and other artificial activities,however,there was no significant evidence which proved it was connected with Eucalyptus plantation.In addition,several approaches to reduce ecological problems ofEucalyptus management and improve sustainable development between Eucalyptus and environment were also summarized.