發(fā)布時間：2018-08-09 15:08

【摘要】：三峽工程建設(shè)對農(nóng)業(yè)持續(xù)發(fā)展、移民安穩(wěn)致富、生態(tài)環(huán)境保護等帶來了重大影響.為減輕和避免三峽工程對庫區(qū)生態(tài)環(huán)境、農(nóng)業(yè)生產(chǎn)和國家戰(zhàn)略性淡水資源產(chǎn)生的負面影響,將三峽環(huán)庫屏障區(qū)、消落區(qū)和水域區(qū)作為整體,實施以屏障區(qū)柑橘、消落區(qū)耐淹牧草、水域區(qū)天然魚場為重點的環(huán)庫特色產(chǎn)業(yè)帶建設(shè)工程,構(gòu)建三峽庫區(qū)循環(huán)農(nóng)業(yè)生態(tài)系統(tǒng),依托特色生態(tài)農(nóng)業(yè)帶阻控面源污染.實證證明,應(yīng)用柑橘營養(yǎng)診斷配方施肥技術(shù),果園營養(yǎng)元素利用率顯著提高,果園出口端徑流可達到地表Ⅱ-Ⅲ類水質(zhì)標準;消落區(qū)耐淹草場底端的入庫徑流NH_4~+-N未檢出,NO_3~--N較果園徑流降低1.5%,可溶性總磷減少48.6%;水域區(qū)實施魚類增殖放流工程,覓食綠藻浮萍等,固定富集水域中的氮磷.項目通過農(nóng)業(yè)生產(chǎn)-產(chǎn)品銷售途徑,將富集的氮磷大量移出庫區(qū).扭轉(zhuǎn)了三峽庫區(qū)生態(tài)環(huán)境退化、農(nóng)業(yè)萎縮和環(huán)境污染加劇的勢頭,保護了國家淡水資源庫安全,可為同類地區(qū)修復(fù)退化生態(tài)系統(tǒng)、發(fā)展循環(huán)生態(tài)農(nóng)業(yè)提供借鑒.
[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，

本文編號：2174477