Some studies show that the duck droppings has higher crude protein, its nutrient content is higher than corn and other feed.
有研究表明，鸭粪含粗蛋白质较高，其营养物质含量高于玉米等饲料。
Some studies show that the duck droppings has higher crude protein, its nutrient content is higher than corn and other feed.
有研究表明，鸭粪含粗蛋白质较高，其营养物质含量高于玉米等饲料。
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