三峡库区循环农业生态系统构建及控氮减磷效果验证试验
发布时间：2018-08-09 15:08
【摘要】：三峡工程建设对农业持续发展、移民安稳致富、生态环境保护等带来了重大影响.为减轻和避免三峡工程对库区生态环境、农业生产和国家战略性淡水资源产生的负面影响,将三峡环库屏障区、消落区和水域区作为整体,实施以屏障区柑橘、消落区耐淹牧草、水域区天然鱼场为重点的环库特色产业带建设工程,构建三峡库区循环农业生态系统,依托特色生态农业带阻控面源污染.实证证明,应用柑橘营养诊断配方施肥技术,果园营养元素利用率显著提高,果园出口端径流可达到地表Ⅱ-Ⅲ类水质标准;消落区耐淹草场底端的入库径流NH_4~+-N未检出,NO_3~--N较果园径流降低1.5%,可溶性总磷减少48.6%;水域区实施鱼类增殖放流工程,觅食绿藻浮萍等,固定富集水域中的氮磷.项目通过农业生产-产品销售途径,将富集的氮磷大量移出库区.扭转了三峡库区生态环境退化、农业萎缩和环境污染加剧的势头,保护了国家淡水资源库安全,可为同类地区修复退化生态系统、发展循环生态农业提供借鉴.
[Abstract]:The construction of the three Gorges Project has a great impact on the sustainable development of agriculture, the stability and prosperity of the immigrants and the protection of the ecological environment. In order to mitigate and avoid the negative effects of the three Gorges Project on the ecological environment, agricultural production and the national strategic freshwater resources of the reservoir area, the three Gorges Ring Reservoir Barrier area, the decline area and the Water area are taken as a whole, and the citrus as a barrier area is implemented. In order to construct the circular agro-ecosystem in the three Gorges Reservoir area and to control the non-point source pollution by relying on the characteristic ecological agriculture belt, the construction of the ring reservoir characteristic industrial belt with the emphasis on the flood tolerance forage and the natural fish farm in the water area is carried out in the three Gorges Reservoir area. It is proved that the utilization rate of nutrient elements in orchard can be improved significantly by applying citrus nutrition diagnosis formula, and the runoff at the exit end of orchard can reach the water quality standard of class 鈪，
本文编号：2174477
[Abstract]:The construction of the three Gorges Project has a great impact on the sustainable development of agriculture, the stability and prosperity of the immigrants and the protection of the ecological environment. In order to mitigate and avoid the negative effects of the three Gorges Project on the ecological environment, agricultural production and the national strategic freshwater resources of the reservoir area, the three Gorges Ring Reservoir Barrier area, the decline area and the Water area are taken as a whole, and the citrus as a barrier area is implemented. In order to construct the circular agro-ecosystem in the three Gorges Reservoir area and to control the non-point source pollution by relying on the characteristic ecological agriculture belt, the construction of the ring reservoir characteristic industrial belt with the emphasis on the flood tolerance forage and the natural fish farm in the water area is carried out in the three Gorges Reservoir area. It is proved that the utilization rate of nutrient elements in orchard can be improved significantly by applying citrus nutrition diagnosis formula, and the runoff at the exit end of orchard can reach the water quality standard of class 鈪，
本文编号：2174477
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