Grazing systems and supplementation effects on tropical forage-based dairy systems in the dry season

I.E. B. Zanette, D.P. Sousa,N.F. de Paula,A.R.M. Santos, B.G. Macedo,R.V. Costa, K.D.V. Camargo,Perivaldo Carvalho,C.H.A. Cabral,C.E.A. Cabral

Livestock Science（2020）

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摘要

•Excess protein in the diet cause N loss in urine and milk.•Increasing CP concentration in the diet had no effect on milk protein content.•Dairy cows in intensive system has greater milk yield and milk lactose content.•Dairy cows in intensive system has lesser nitrogen use efficiency.

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关键词

Dairy cattle,Irrigation,Nitrogen fertilization,Nitrogen metabolism,Protein supplementation

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