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辽宁盘锦市大洼县西安农场生态养殖试验场,从1984年开始,根据生态学系统工程原理,将放养水生饲料同养猪、养禽、养鱼,养蚌、养蟹和种植水稻有机结合起来。经过几年的试验开发,现已形成了一个较为完整,经水生饲料为核心,以水资源为纽带,猪、禽粪尿水四级净化,五步利用的生态养殖系统工程。首先将冲洗猪、禽舍的高浓度粪尿水作为第一级肥水,引入水葫芦养殖池,经过水葫芦7天的吸收净化后为第二级肥水,引入细绿萍池中,经过细绿萍7天的吸收净化后为第三级肥水(此时水质变清并生长出大量浮游生
Panjin City, Liaoning Daxian Xian farms ecological farms, from 1984 onwards, according to principles of ecological systems engineering, aquaculture stocking with pigs, poultry, fish, clams, crabs and rice cultivation organically combined . After several years of trial and development, a more complete ecological aquaculture system project has been formed that uses aquatic feed as the core, water resources as a link, pigs and poultry excrement as a four-stage purification and five-step utilization. First flushing pigs, poultry houses of high concentration of excreta as a first-class fertilizer water, water hyacinth aquaculture ponds, water hyacinth 7 days after the absorption of purified water for the second stage, the introduction of fine green Ping pool, after the fine green After 7 days of absorption and purification, the third-level fertilizer and water (at this time, the water quality became clear and a large amount of plankton grew