Chapter 9

Outline and discuss the life-cycle dairy cattle feeding program
Identify specific nutrient needs or additives used within the life cycle.
Identify nutrient-related diseases and disorders within the dairy cattle life cycle.

Read Chapter 9 concentrating on pp.397-top of 402. and the feeding periods (see fig. 9-1)
Complete study questions I -IV.
Go over and study [ Lecture notes ]

Chapter Highlights

Dairy diets are formulated around forages
estimated daily intake of forages is based on body weight and on forage quality
maximum forage dry matter consumption may be established at 1.75 to 2.0% of B.W.
If a 1400 lb dairy cow eat 2% of her BW as forage dry matter, how many pound of dry matter will she have consumed? Answer: 28 lb (1400 lb X 2% )
Dairy cows cannot consume enough forages to achieve maximum milk production; therefore, lactating diets contain both forages and concentrates (grains, soybean meal, minerals, vitamins)
Figure 9-1 illustrates the level of milk production, milk fat test, dry matter intake and change in body weight
High-producing cows during the first 12-16 weeks of lactation will benefit most form added fat.
High-producing cows will likely benefit form diets formulated to contain greater than normal proportions of bypass (UIP) protein
Posilac^® (recombinant bovine somatropin; rbST) is made in genetically engineered bacteria containing the bST gene.. Somatotropin and growth hormone are synonymous terms.
Expected increases in milk production in cows implanted with Posilac^® will be 8 to 10+ lb. milk per day per cow.
Ketosis, milk fever, fat-cow syndrome, displaced abomasum, bloat, and rumen acidosis are all common problems in dairy cows.