关键词: 洞庭湖, 退田还湖, 畜牧业, 资源, 环境

Abstract: A serial programme of ecological restoration for lake recovery and flood control were implemented, and a large amount of land resources were lost for farmers. In Dongting lake region, the farmers who implemented the project of lake recovery and flood control only had limited land resources,and animal husbandry has been chosen as a principle substitute industry in the demonstrative region of Yuanjiang and Hanshou county. The objectives of this paper are to probe the feasibility of developing green and organic animal husbandry. The results showed that the major indexes of sampling water are lower than those of the state sanitation standard of nonpublic hazard and green food on irrigating and feeding water except the coliform. The background values of heavy metals and fluorine in soil were also lower than those of the state sanitation standard of nonpublic hazard and green food in soil environmental background .The indexes of trace elements and heavy metals and fluorine of major feedstuffs and forages were lower than those of the state sanitation standard of nonpublic hazard and green food on feedstuffs and forages. At present, the higher copper, zinc, arsenic and chromium premixes were popularly used in the complete rations or supplements, and the environment and animal products could be influenced by the abusement of feed additives. On the other hand, a minority of feedstuffs and forages which has the ability of largely absorbing trace elements and heavy metals may provide the possibility to formulate reasonablely animal rations satisfied with the requirements of livestock and poultry. Furthermore, it is not necessary to supplement inorganic and organic trace elements in the complete ration in the future. It was found out that coliform populations were higher than those of the state standard, resulted possibly from implementing directly animal and human wastes into the field. So it is necessary to enhance the management of animal waste.

Key words: Dongting Lake, animal husbandry, resources, environment