The relationship between the serum magnesium concentration of grazing ewes and their dry matter intake and milk yield

Abstract

1. A group of six lactating ewes, rotationally grazed a low-nitrogen treated plot (40 lb nitrogen applied in early March) and a similar group a highnitrogen treated plot (1001b nitrogen applied in early March and 60 lb at monthly intervals thereafter, all as Nitro-chalk) from mid-April to early July, and the concentrations of serum magnesium and calcium along with food intake and milk yields of the ewes were studied.