scholarly journals Lactation performance of dairy cows fed yeast-derived microbial protein in low- and high-forage diets

2016 ◽  
Vol 99 (4) ◽  
pp. 2775-2787 ◽  
Author(s):  
A.K. Manthey ◽  
K.F. Kalscheur ◽  
A.D. Garcia ◽  
K. Mjoun
Keyword(s):  
Dairy Cows ◽  
Microbial Protein ◽  
Lactation Performance ◽  
High Forage ◽  
Forage Diets

Influence of a dietary excess of rumen degradable or undegradable protein on the lactation performance of Dairy cows

1984 ◽  
Vol 1984 ◽  
pp. 3-3
Author(s):  
B. Sloan ◽  
P. Rowlinson ◽  
D.G. Armstrong
Keyword(s):  
Dairy Cows ◽  
Early Lactation ◽  
Microbial Protein ◽  
Lactation Performance ◽  
Protein Requirement ◽  
Tissue Protein ◽  
Protein Requirements ◽  
Minimum Requirements ◽  
Rumen Microflora ◽  
Degradable Protein

The basis of the proposed scheme introduced by the A.R.C. (1980) for calculating the protein requirements of ruminants is the division of the protein requirement into two parts, (1) a minimum rumen degradable protein (RDP) supply to satisfy the requirements of the rumen microflora for cell wall synthesis, (2) a minimum undegradable protein (UDP) supply (protein that passes through the rumen to the intestine) which supplements the microbial protein produced in the rumen ensuring the tissue protein requirements of the ruminant can be met. The purpose of the experiment reported here was to investigate the effects on lactation parameters of feeding early lactation cattle levels of UDP or RDP above the minimum requirements proposed by the A.R.C. (1980).

scholarly journals Responses of Lactating Dairy Cows to Protected Fats or Whole Cottonseed in Low or High Forage Diets

1990 ◽  
Vol 73 (12) ◽  
pp. 3512-3525 ◽  
Author(s):  
D. Lubis ◽  
H.H. Van Horn ◽  
B. Harris ◽  
K.C. Bachman ◽  
S.M. Emanuele
Keyword(s):  
Dairy Cows ◽  
Lactating Dairy Cows ◽  
Whole Cottonseed ◽  
High Forage ◽  
Forage Diets

scholarly journals Use of condensed molasses fermentation solubles as an alternative source of concentrates in dairy cows

2021 ◽  
Vol 34 (2) ◽  
pp. 205-212
Author(s):  
Jian Ma ◽  
Chen Ma ◽  
Xue Fan ◽  
Ali Mujtaba Shah ◽  
Jiang Mao
Keyword(s):  
Dairy Cows ◽  
Dry Matter ◽  
Nutrient Digestibility ◽  
Immunoglobulin M ◽  
Production Performance ◽  
Control Group ◽  
Microbial Protein ◽  
Lactation Performance ◽  
Alternative Source ◽  
Lactating Cows

Objective: The purpose of present study was to investigate the effects of condensed molasses fermentation solubles (CMS) on lactation performance, rumen fermentation, nutrient digestibility, and serum parameters of dairy cows.Methods: A total of 75 healthy Holstein cows with the same parity (milk production = 35±2.5 kg, body weight = 570±28 kg) were randomly selected and divided into 5 groups. One group served as control group (CON; no CMS), whereas the other 4 groups were CMS1 (accounted for 1% of the diet), CMS2 (2%), CMS3 (3%), and CMS4 (4%). All cows were fed regularly three times each day at 0800, 1600, and 2400 h. Cows received diet and water <i>ad libitum</i>. The experiment lasted for 60 days.Results: Results showed that the dry matter intake, milk yield, and protein of CMS2 were maximum and higher (p<0.05) than CMS4. The ruminal pH was observed less than 6 in CMS3 and CMS4 groups. No noticeable difference of microbial protein was found between CON and CMS2 groups, while the microbial protein in these groups was higher (p<0.05) than CMS3 and CMS4 groups. The apparent digestibility of dry matter, organic matter, and crude protein in CMS2 group was higher (p<0.05) than CMS3 and CMS4 groups. Compared to CMS3 and CMS4 groups, the CMS2 group increased (p<0.05) the serum concentrations of immunoglobulin G and immunoglobulin M on d 60.Conclusion: Therefore, it is practicable that CMS substitutes for a part of concentrates in lactating cows’ diets, but higher addition of CMS (more than 3% of the diet) could decrease production performance of dairy cows as seen in the present study.

ENERGY SUPPLEMENTATION OF HIGH FORAGE DIETS FOR MID-LACTATION DAIRY COWS

1990 ◽  
Vol 70 (3) ◽  
pp. 867-874 ◽  
Author(s):  
P. H. ROBINSON ◽  
P. L. BURGESS
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Feed Intake ◽  
Dry Matter ◽  
Short Chain Fatty Acids ◽  
Animal Performance ◽  
Milk Fatty Acids ◽  
Alfalfa Silage ◽  
High Forage ◽  
Forage Diets

Alfalfa silage-based rations containing corn grain, oats or tallow as the primary supplemental energy source were fed to a total of 48 mid-lactation cows in two 56-d experiments. Corn, oats or tallow were mixed with the alfalfa silage and fed ad libitum. A corn-barley-soybean meal-based concentrate was fed twice daily proportional to milk production. Overall rations varied from 55 to 70% alfalfa silage on a dry matter basis. Feed intake was lower for tallow-supplemented cows, whereas milk yield and milk proportions of fat and lactose were similar for cows in all groups. Tallow-supplemented cows produced milk with a lower protein proportion and protein yield was also lower. Tallow-supplemented cows produced milk with major shifts in milk fatty acids from most short-chain fatty acids (<C16:1) to primarily C18:1 as well as C18:0 and C20:0. Parameters of rumen fermentation were similar among all groups and did not suggest a ruminal mechanism for reduced feed intake in spite of the high level of added fat (8.6 and 6.2% of dietary dry matter in exp. 1 and exp. 2, respectively). Isoenergetic substitution of oats for corn had no negative effects on animal performance in these high-forage diets. However, addition of tallow to alfalfa silage at these levels depressed overall animal performance. Key words: Tallow, oats, corn, milk fatty acids, dairy cows

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