Effects of dietary supplementation with fructooligosaccharides on the excretion of nitrogen and phosphorus in Miichthys ......

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随着氮肥、磷肥、钾肥投入量的不断增加,我国农作物的产量也不断提高,但忽视了植物必需的微量元素的补充,因土壤中微量元素缺乏引......