Lee S, Britton W M
Poult Sci. 1980 Sep;59(9):1989-94. doi: 10.3382/ps.0591989.
Excessive dietary magnesium (Mg) (.3, .5, and .9% additions to a corn-soy basal diet) fed to broiler chicks was found to be cathartic and significantly decreased 28-day body weight, significantly increased mortality, and induced leg abnormalities. Increasing dietary phosphorus (P) significantly ameliorated the detrimental effects of Mg toxicity except at the highest Mg level (.9% addition). Increasing dietary chloride (Cl) significantly increased body weights of Mg intoxicated chicks and significantly reduced the hypermagnesemia induced by excessive dietary magnesium. Excessive dietary magnesium increases the need for dietary P. Failure to monitor Mg content of diets may contribute to the ambiguity of ascertaining the P requirement of domestic fowl.
给肉鸡雏鸡饲喂过量的膳食镁（在玉米 - 大豆基础日粮中添加0.3%、0.5%和0.9%）被发现具有导泻作用，显著降低了28日龄时的体重，显著提高了死亡率，并引发腿部异常。增加膳食磷（P）显著改善了镁中毒的有害影响，但在最高镁水平（添加0.9%）时除外。增加膳食氯（Cl）显著增加了镁中毒雏鸡的体重，并显著降低了过量膳食镁引起的高镁血症。过量的膳食镁增加了对膳食磷的需求。未能监测日粮中的镁含量可能会导致确定家禽磷需求量的不确定性。
