Pigs in the control group were fed a basal diet, and in experimental groups were fed basal diets with 30% and 60% reduction of the trace mineral elements.

对照组饲喂基础饲粮，试验组饲喂在基础饲粮基础上减少30%或60%矿物元素的饲粮。

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A 40% fish meal basal diet was formulated using fish meal and wheat gluten meal as main protein sources, and fish oil, soybean oil and soybean lecithin as main lipid sources.

以鱼粉、小麦蛋白粉为主要蛋白质源，鱼油、大豆油和大豆卵磷脂为主要脂肪源，配制含40%鱼粉的基础饲料。

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