Production efficiency, milk yield, and milk composition and fatty acids profile of lactating goats feeding formaldehyde-treated canola meal in two levels of dietary crude protein

2021 ◽  
Vol 204 ◽  
pp. 106519
Author(s):  
M.A. Tajaddini ◽  
O. Dayani ◽  
A. Khezri ◽  
R. Tahmasbi ◽  
M.M. Sharifi-Hoseini
Keyword(s):  
Fatty Acids ◽  
Milk Yield ◽  
Crude Protein ◽  
Production Efficiency ◽  
Milk Composition ◽  
Canola Meal ◽  
Fatty Acids Profile ◽  
Dietary Crude Protein ◽  
Lactating Goats

Effect of feeding formaldehyde- and heat-treated oil seed on milk yield and milk composition

1998 ◽  
Vol 78 (4) ◽  
pp. 693-700 ◽  
Author(s):  
S. M. Tymchuk ◽  
G. R. Khorasani ◽  
J. J. Kennelly
Keyword(s):  
Fatty Acids ◽  
Linolenic Acid ◽  
Milk Yield ◽  
Milk Protein ◽  
Control Diet ◽  
Milk Composition ◽  
Canola Meal ◽  
Canola Seed ◽  
Heat Treated ◽  
Formaldehyde Treatment

The primary objective of this study was to determine the effect of formaldehyde-treated oil seed on milk composition, with particular emphasis on the fatty acid and protein composition of milk. Ground and heat-treated canola seed treatments were included for comparison purposes. Four early-lactation Holstein cows were assigned to four treatments in a 4 × 4 Latin square design. Cows were fed a control diet containing 60% concentrate, 20% alfalfa silage and 20% barley silage (DM basis). The concentrate portion was based on rolled barley, canola meal, and ground corn. Canola seed replaced barley and canola meal in the control diet at 5% on a DM basis. Dry matter intake (21.0 ± 0.1 kg d−1), milk yield (33.3 ± 1.57 kg d−1), milk component yield and milk protein and lactose percentages were not affected (P > 0.05) by dietary treatment. Cows fed untreated ground canola seed had lower (P < 0.05) milk fat percentage than cows fed the other treatments. The addition of untreated and heat-treated canola seed reduced palmitic acid (15%) and increased oleic acid (14%), but had no effect on linoleic and linolenic acid concentrations. Formaldehyde treatment resulted in a 76 and 123% increase in C18:2 and C18:3, respectively over the control diet, whereas untreated and heat-treated canola seed did not influence the concentration of these fatty acids. Effects of treatments on milk protein and non-protein nitrogen components were minor or nonexistent. Transfer efficiencies calculated for linoleic and linolenic acid indicated that formaldehyde treatment was efficacious in significantly reducing the extent of biohydrogenation of fatty acids in the rumen. Key words: Canola seed, dietary fat, dairy cattle, milk composition

The effects of feeding high fiber canola meal on total tract digestibility and milk production

1997 ◽  
Vol 77 (1) ◽  
pp. 133-140 ◽  
Author(s):  
A. F. Mustafa ◽  
D. A. Christensen ◽  
J. J. McKinnon
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Nutritive Value ◽  
Block Design ◽  
Latin Square ◽  
Total Solid ◽  
Milk Composition ◽  
Canola Meal ◽  
Protein Supplement ◽  
High Fiber

Two studies were undertaken to evaluate the nutritive value of high fiber canola meal (HFCM) relative to regular canola meal for ruminants. In the first study, 21 growing lambs were utilized in a randomized complete block design to determine the total tract digestion coefficients of dry matter (DMD), crude protein (CPD), gross energy (GED), neutral (NDFD) and acid (ADFD) detergent fiber and the digestible energy (DE) contents of seven dehydrated alfalfa-based diets containing 0, 250, 500 and 750 g kg−1 HFCM or canola meal. In the second study, the effect of feeding HFCM as a protein supplement to dairy cows relative to canola meal and soybean meal (SBM) was examined in a triple 3 × 3 Latin square design. Results of the first study showed that HFCM had lower (P < 0.05) DMD, CPD, GED and DE contents than canola meal. The estimated DMD, CPD and GED and DE contents for HFCM were 674 and 795 g kg−1, 695 kJ MJ−1 and 13.68 MJ kg−1, respectively. The corresponding values for canola meal were 707 and 841 g kg−1, 727 kJ MJ−1 and 14.10 MJ kg−1, respectively. Results of the second study showed that protein supplement source had no effect on DM intake, milk yield, milk fat g kg−1, lactose g kg−1 and total solid g kg−1. However, cows fed HFCM- and canola meal-based diets produced milk with lower (P < 0.05) protein content than those fed the SBM-based diet. It was concluded that HFCM had lower total tract nutrient digestion coefficients and DE content compared with canola meal. Incorporation of HFCM in dairy rations up to 100 g kg−1 of the ration had no adverse effect on milk yield or milk composition compared with canola meal. Key words: High fiber, canola meal, total tract digestibility, lactation

Crude protein levels in diets of lactating goats: nitrogen balance, urea excretion and microbial protein synthesis

2016 ◽  
Vol 154 (6) ◽  
pp. 1102-1109 ◽  
Author(s):  
E. DE JESUS DOS SANTOS ◽  
M. L. ALBUQUERQUE PEREIRA ◽  
M. PEREIRA DE FIGUEIREDO ◽  
H. G. DE OLIVEIRA SILVA ◽  
J. FERREIRA DA CRUZ ◽  
...  
Keyword(s):  
Protein Synthesis ◽  
Crude Protein ◽  
Production Efficiency ◽  
The Body ◽  
N Balance ◽  
Microbial Protein ◽  
Urea Excretion ◽  
Microbial Protein Synthesis ◽  
Lactating Goats ◽  
Rate Of Increase

SUMMARYThe experiment, conducted at Bahia, Brazil, from May to August 2010, aimed to evaluate the nitrogen (N) balance, urea excretion and microbial protein synthesis in lactating goats fed pelleted concentrates with the addition of crude protein (CP), obtained by replacing alfalfa hay with soybean meal. The diets consisted of different levels of CP and 200 g of roughage (Tifton 85 hay)/kg. Maize and mesquite bran were used as the energy source, with maize replaced by mesquite bran in the ratio of 1·7:1. Eight female Saanen goats were used, confined in individual pens and allocated to a 4 × 4 Latin square design. The N balance in the body was positive, and loss of body weight (–0·03 g/day) was observed for the diet with 190 g CP/kg. The concentration (mg/dl) of urea in urine, milk and blood plasma was positively influenced in a linear form, and the highest rate of increase was found in urine, with 2 mg/dl for every 10 g CP/kg added to the diet. The microbial protein synthesis was not affected, but the diets reduced the microbial protein (44 g/day) and its ruminal production efficiency (30 g/kg total digestible nutrients). The levels above 190 g of CP are not recommended because of the energy expenditure required to excrete the urea.

scholarly journals Metabolism, Ketosis Treatment and Milk Production after Using Glycerol in Dairy Cows: A Review

Animals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1379
Author(s):  
Robert Kupczyński ◽  
Antoni Szumny ◽  
Katarzyna Wujcikowska ◽  
Natalia Pachura
Keyword(s):  
Fatty Acids ◽  
Milk Yield ◽  
Milk Fat ◽  
High Energy ◽  
Milk Composition ◽  
Raw Material ◽  
Biodiesel Production ◽  
Cattle Feed ◽  
Current State ◽  
Odd Chain Fatty Acids

The aim of this paper is to review and systematize the current state of knowledge on glycol metabolism in cattle. Glycerol, derived from biodiesel production, must be purified in order to be a useful product for feeding livestock. The use of glycerol in the feeding of ruminants can be justified for several reasons: (i) it is a source of energy in the ration, (ii) it is a glucogenic precursor, and (iii) it may have an effect on milk composition. The high energy value of glycerol provides the opportunity to use this raw material as a partial grain substitute in cattle feed rations. Dietary supplementation of glycerol is associated with increased propionate, butyrate, valerate, and isovalerate concentrations in the rumen. Glycerol can be used at up to 10%–15% of the dietary dry matter (DM) and is well-established as a treatment for ketosis in cows. Glycerol increases plasma glucose and may reduce non-esterified fatty acids and β-hydroxybutyrate levels. The use of glycerol does not have a clear effect on DM intake, milk yield, or milk composition. However, some authors have reported an increase in milk yield after glycerol supplementation associated with decreased milk fat concentration. It is also possible that the concentration in the milk of odd-chain fatty acids and cis-9, trans-11 conjugated linoleic acid may increase after glycerol application.

Supplementation with whole cottonseed changes milk composition and milk fatty acid profile in dairy cows

2011 ◽  
Vol 51 (2) ◽  
pp. 95 ◽  
Author(s):  
O. Dayani ◽  
G. R. Ghorbani ◽  
A. K. Esmailizadeh
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Fatty Acid Profile ◽  
Milk Yield ◽  
Experimental Period ◽  
Milk Composition ◽  
Milk Fatty Acid ◽  
Whole Cottonseed

Eight multiparous Holstein cows in mid lactation (average days in milking of 160 ± 40) were used in a replicated 4 by 4 Latin square design, each experimental period lasting 3 weeks, to determine the effects of whole cottonseed (WCS) treatment and dietary crude protein (CP) concentration on the profile of milk fatty acids. Each 3-week experimental period consisted of 2 weeks for ration adaptation followed by 1 week for data collection. The experimental diets consisted of: (1) Control (without WCS), 16% CP; (2) 20% WCS, 16% CP; (3) 20% WCS, 13% CP; and (4) 20% crushed WCS, 13% CP. Minerals and vitamin supplements were the same in all experimental diets. The WCS treatment led to increased DM intake, fat-corrected milk yield, fat concentration, proportion of long-chain fatty acids, unsaturated fatty acids and ratio of unsaturated to saturated fatty acids (P < 0.05). Decreased concentration of dietary CP from 16 to 13% (diet 2 compared with diet 3) led to a decrease in both milk yield and milk composition (P < 0.05). WCS crushed in diets with 13% CP (diet 4 compared with diet 3) increased (P < 0.05) the concentration of conjugated linoleic acid in milk fat. The results demonstrated that adding WCS to the diet of lactating cows improves both milk yield and milk fatty acid profile, particularly the proportion of conjugated linoleic acid.

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