| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Department of Animal and Avian Sciences, University of Maryland, College Park 20742
2 Nutrient Conservation and Metabolism Laboratory, Livestock and Poultry Sciences Institute, Agricultural Research Service, USDA, Beltsville, MD 20705
Effects of genotype and level of intake on net energy for lactation values of corn silage were evaluated by indirect calorimetry in two experiments using lactating and dry, nonpregnant dairy cows. In experiment 1, six multiparous Holstein cows in early lactation were fed experimental diets containing either brown midrib (bm3) or isogenic normal corn silage. Dietary treatments were isogenic and bm3 diets fed ad libitum, and the bm3 diets restricted-fed. Dry matter (DM) intake was 2.4 kg/d greater for cows fed the bm3 diet ad libitum compared with cows fed the isogenic diet. Apparent digestibilities of DM, organic matter, neutral detergent fiber, and acid detergent fiber were greater for cows restricted-fed bm3 than the isogenic diet. In experiment 2, six dry, nonpregnant Holstein cows were fed maintenance diets containing either bm3 or isogenic corn silage. Apparent digestibilities of DM, organic matter, neutral detergent fiber, and acid detergent fiber were greater for cows fed bm3 compared with isogenic corn silage. Digestible energy and metabolizable energy were greater for maintenance diets containing bm3 compared with isogenic corn silage, respectively. These data indicate increased milk production seen in other studies is a result of increased DMI rather than an increase in energy efficiency. Increased organic matter digestibility of bm3 corn silage resulted in greater digestible energy and metabolizable energy values in cows fed at maintenance energy intake. However, calculated net energy for lactation values of bm3 and isogenic corn silages were similar at both productive and maintenance levels of feeding.
Key Words: brown midrib corn silage • energy balance
Submitted on June 1, 2000
Accepted on November 11, 2000
This article has been cited by other articles:
|
|
 |
|
  C. Kendall, C. Leonardi, P. C. Hoffman, and D. K. Combs Intake and milk production of cows fed diets that differed in dietary neutral detergent fiber and neutral detergent fiber digestibility J Dairy Sci, January 1, 2009; 92(1): 313 - 323. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. I. Borucki Castro, L. E. Phillip, H. Lapierre, P. W. Jardon, and R. Berthiaume The Relative Merit of Ruminal Undegradable Protein from Soybean Meal or Soluble Fiber from Beet Pulp to Improve Nitrogen Utilization in Dairy Cows J Dairy Sci, October 1, 2008; 91(10): 3947 - 3957. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. Kung Jr., B. M. Moulder, C. M. Mulrooney, R. S. Teller, and R. J. Schmidt The Effect of Silage Cutting Height on the Nutritive Value of a Normal Corn Silage Hybrid Compared with Brown Midrib Corn Silage Fed to Lactating Cows J Dairy Sci, April 1, 2008; 91(4): 1451 - 1457. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. O. Chow, V. S. Baron, R. Corbett, and M. Oba Effects of Planting Date on Fiber Digestibility of Whole-Crop Barley and Productivity of Lactating Dairy Cows J Dairy Sci, April 1, 2008; 91(4): 1534 - 1543. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. M. Gehman, P. J. Kononoff, C. R. Mullins, and B. N. Janicek Evaluation of Nitrogen Utilization and the Effects of Monensin in Dairy Cows Fed Brown Midrib Corn Silage J Dairy Sci, January 1, 2008; 91(1): 288 - 300. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. P. Weiss and D. J. Wyatt Effect of Corn Silage Hybrid and Metabolizable Protein Supply on Nitrogen Metabolism of Lactating Dairy Cows J Dairy Sci, May 1, 2006; 89(5): 1644 - 1653. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. L. Oliver, J. F. Pedersen, R. J. Grant, and T. J. Klopfenstein Comparative Effects of the Sorghum bmr-6 and bmr-12 Genes: I. Forage Sorghum Yield and Quality Crop Sci., September 23, 2005; 45(6): 2234 - 2239. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. C. Taylor and M. S. Allen Corn Grain Endosperm Type and Brown Midrib 3 Corn Silage: Feeding Behavior and Milk Yield of Lactating Cows J Dairy Sci, April 1, 2005; 88(4): 1425 - 1433. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. L. Beckman and W. P. Weiss Nutrient Digestibility of Diets with Different Fiber to Starch Ratios when Fed to Lactating Dairy Cows J Dairy Sci, March 1, 2005; 88(3): 1015 - 1023. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
X. Qiu, M. L. Eastridge, and Z. Wang Effects of Corn Silage Hybrid and Dietary Concentration of Forage NDF on Digestibility and Performance by Dairy Cows J Dairy Sci, November 1, 2003; 86(11): 3667 - 3674. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Oba and M. S. Allen Effects of Diet Fermentability on Efficiency of Microbial Nitrogen Production in Lactating Dairy Cows J Dairy Sci, January 1, 2003; 86(1): 195 - 207. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. P. Weiss and D. J. Wyatt Effects of Feeding Diets Based on Silage from Corn Hybrids that Differed in Concentration and In Vitro Digestibility of Neutral Detergent Fiber to Dairy Cows J Dairy Sci, December 1, 2002; 85(12): 3462 - 3469. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
