Sulfur Requirement of Lactating Dairy Cows. I. Sulfur Balance and Dietary Supplementation

Effects of dietary polyunsaturated fatty acids on ovarian function and prostaglandin secretion in lactating dairy cows

As lactating cows in severe negative energy balance have poor reproductive performance, the effect of dietary fat supplementation (fish oil, soybean oil) on PGFM secretion, ovarian function and blood metabolites is investigated. In this experiment, the effects of dietary polyunsaturated fatty acids on plasma metabolites, ovarian function and prostaglandin secretion of 20 primiparous Holstein co...

Effect of yeast culture supplementation of alfalfa silage or alfalfa hay fed to lactating dairy cows

Feeding Lactating Dairy Cows Proteins Resistant to Ruminal Degradation I

Sixty multiprious Holstein cows were fed treatment diets from 11 to 40 d postpartum with corn silage as the forage. Treatment diets each contained a different supplemental protein: 1) solvent soybean meal; 2) extruded soy product; 3) combination of corn gluten meal and distillers dried grains with solubles; and 4) a combination of protein sources from diets 2 and 3. Covariate adjusted means for...

Enfluence of increasing dietary cation-anion balance on the performance of lactating dairy cattle

Tolerance of cattle to increased dietary sulfur and effect of dietary cation-anion balance.

The objective of this study was to determine if dietary cation-anion balance (DCAB) affects the concentration of S that can be tolerated by growing and finishing cattle without adversely affecting performance. Angus cross and Bradford steers (n=114; average initial BW=252.8 kg) were blocked by BW and breed, and randomly assigned within a block to treatment. The design was a 3 × 2 factorial arra...