过瘤胃蛋氨酸与过瘤胃赖氨酸不同组合对奶牛瘤胃微生物蛋白产量、产奶性能和氮排泄的影响
Effects of Different Combinations of Rumen-Protected Methionine and Rumen-Protected Lysine on Rumen Microbial Protein Production, Lactation Performance and Nitrogen Excretion of Dairy Cows
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