铜水平对生长育肥猪生产性能及铜的表观消化率、粪铜排泄率的影响
동수평대생장육비저생산성능급동적표관소화솔、분동배설솔적영향
Effects of different Copper Levels on Production Performance of Growing-Finishing Pigs,Apparent Digestibility and Excretion Rate of Copper in Excrement
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