Milk production from dairy cows offered a conserved barley/kale bicrop compared to grass silage

1998 ◽  
Vol 1998 ◽  
pp. 24-24
Author(s):  
J.M. Moorby ◽  
P.R. Evans ◽  
N.E. Young
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Energy Supply ◽  
Protein Production ◽  
Milk Protein ◽  
Microbial Population ◽  
Grass Silage ◽  
Feed Protein

The efficiency of use of feed protein for milk protein production is very poor, particularly for animals offered conserved forages. Contributing to this is the inefficient capture of rumen degradable N in situations where a readily fermentable energy supply is not available for use by the rumen microbial population. The incorporation of a whole crop cereal into a conserved forage could increase rumen protein efficiency. This experiment was carried out to investigate the milk production of dairy cows offered a conserved forage of a whole crop barley and kale bicrop compared with grass silage, and a mixture of the two.

Milk production from dairy cows offered a conserved barley/kale bicrop compared to grass silage

1998 ◽  
Vol 1998 ◽  
pp. 24-24 ◽  
Author(s):  
J.M. Moorby ◽  
P.R. Evans ◽  
N.E. Young
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Energy Supply ◽  
Protein Production ◽  
Milk Protein ◽  
Microbial Population ◽  
Grass Silage ◽  
Feed Protein

The efficiency of use of feed protein for milk protein production is very poor, particularly for animals offered conserved forages. Contributing to this is the inefficient capture of rumen degradable N in situations where a readily fermentable energy supply is not available for use by the rumen microbial population. The incorporation of a whole crop cereal into a conserved forage could increase rumen protein efficiency. This experiment was carried out to investigate the milk production of dairy cows offered a conserved forage of a whole crop barley and kale bicrop compared with grass silage, and a mixture of the two.

Replacing wheat with canola meal and maize grain in the diet of lactating dairy cows: Feed intake, milk production and cow condition responses

2017 ◽  
Vol 84 (3) ◽  
pp. 240-247 ◽  
Author(s):  
Ruairi P McDonnell ◽  
Martin vH Staines
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Milk Fat ◽  
Milk Protein ◽  
Daily Intake ◽  
Canola Meal ◽  
Grass Silage ◽  
Holstein Friesian ◽  
Maize Grain ◽  
The Difference

This research paper describes the effect of partially replacing wheat with maize grain and canola meal on milk production and body condition changes in early lactation Holstein-Friesian dairy cows consuming a grass silage-based diet over an 83-d period. Two groups of 39 cows were stratified for age, parity, historical milk yield and days in milk (DIM), and offered one of two treatment diets. The first treatment (CON) reflected a typical diet used by Western Australian dairy producers in summer and comprised (kg DM/cow per d); 8 kg of annual ryegrass silage, 6 kg of crushed wheat (provided once daily in a mixed ration), 3·6 kg of crushed lupins (provided in the milking parlour in two daily portions) and ad libitum lucerne haylage. The second treatment diet (COMP) was identical except the 6 kg of crushed wheat was replaced by 6 kg of a more complex concentrate mix (27% crushed wheat, 34% maize grain and 37% canola meal). Lucerne haylage was provided independently in the paddock to all cows, and no pasture was available throughout the experiment. The COMP group had a greater mean overall daily intake (22·5vs20·4 kg DM/cow) and a higher energy corrected milk (ECM) yield (29·2vs27·1 kg/cow;P= 0·047) than the CON cows. The difference in overall intake was caused by a higher daily intake of lucerne haylage in COMP cows (4·5vs2·3 kg DM/cow). The CON group had a higher concentration of milk fat (42·1vs39·3 g/kg;P= 0·029) than COMP cows. Milk protein yield was greater in COMP cows (P< 0·021); however, milk fat yield was unaffected by treatment. It is concluded that partially replacing wheat with canola meal and maize grain in a grass silage-based diet increases voluntary DMI of conserved forage and consequently yields of ECM and milk protein.

The Effect of Level of Supplement Feeding and Source of Protein on Milk Production and Nutrient Flows of Dairy Cows

1994 ◽  
Vol 1994 ◽  
pp. 142-142
Author(s):  
F.P. O'Mara ◽  
J.J. Murphy ◽  
M. Rath
Keyword(s):  
Protein Synthesis ◽  
Dairy Cows ◽  
Milk Production ◽  
Milk Protein ◽  
Solid Phase ◽  
Latin Square ◽  
Nutrient Flows ◽  
Grass Silage ◽  
Bacterial Marker ◽  
Friesian Cows

Milk protein synthesis may be limited by amino acid (AA) flow to the duodenum. This can be increased by increasing the flow of microbial AA's or undegraded feed AA's. This experiment was carried out to determine the effect on milk production and nutrient flows at the duodenum of including fishmeal (120g/kg) in the supplement to grass silage at two levels of supplement feeding.The treatments, arranged in a 2x2 factorial, were 1.) 3.5 kg/day of 0% fishmeal supplement (L-UDP), 2.) 7 kg/day of L-UDP, 3.) 3.5 kg/day of 12% fishmeal supplement (H-UDP), and 4.) 7 kg/day of H-UDP. Supplements were fed to 3 6 Friesian cows in a 4x4 multiple Latin-square trial with three week periods to determine production responses, and to four ruminally and duodenally cannulated cows to determine rumen fermentation and nutrient flows. Flows were determined by the dual marker technique of Faichney (1975) using cobalt-EDTA and ytterbium acetate as liquid and solid phase markers respectively. Purines were used as the bacterial marker (Zinn and Owens, 1986). Degradability of the feeds was measured in 3 other cows using the small bag technique described by De Boer et al. (1987).

scholarly journals Rapeseed meal as a supplementary protein for dairy cows on grass silage-based diet, with the emphasis on the Nordic AAT-PBV feed protein evaluation system

1992 ◽  
Vol 1 (4) ◽  
pp. 367-439 ◽  
Author(s):  
Mikko Tuori
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Evaluation System ◽  
Rapeseed Meal ◽  
Glucosinolate Content ◽  
Grass Silage ◽  
Utilization Of Protein ◽  
Concentrate Mixture ◽  
Feeding Trials ◽  
Feed Protein

The effect of rapeseed meal (RSM) supplementation on the performance of dairy cows on direct cut grass silage based diets was studied in five feeding trials. The proportion of RSM varied from 0% to 33% in the concentrate mixture (the grain was an oat-barley mixture of 1:1). In one experiment the treatments were RSM and soybean meal (SBM), while in another experiment forage was either grass silage or bam dried hay cut at the same maturity. In addition, this was compared to the data of other trials in Finland during the last ten years, in which RSM supplementation had been used. Using this data the response in terms of milk yield to RSM supplementation was estimated. The utilization of protein in milk production was estimated by the Nordic AAT-PBV protein evaluation system. During the experiments (1983-1990) the varieties of turnip rape were changed from high glucosinolate, containing single-zero, to low glucosinolate containing doublezero varieties, while the glucosinolate content was reduced from 40-50 μmoles to 14 μmoles per g of defatted meal. Heat-moisture treatment (™Öpex) further reduced the glucosinolate content by half. By replacing grain with RSM in the concentratemixture with ad libitum silage feeding, the silage intake increased by 0.43 kg per kg increase in RSM on the basis of dry matter (DM) (non significant). The response in increased milk production was 0.77 kg in milk or 0.70 kg in energy corrected milk (ECM) yield (P

Examining the Metabolisable Protein system at ideal protein:energy ratios in dairy cows

1997 ◽  
Vol 1997 ◽  
pp. 83-83
Author(s):  
J A Metcalf ◽  
R J Mansbridge ◽  
J S Blake ◽  
J R Newbold ◽  
J D Oldham
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Protein Production ◽  
Milk Protein ◽  
Protein System ◽  
Metabolisable Energy

Previous work at ADAS Bridgets aimed at evaluating the Metabolisable Protein (MP) system (AFRC 1992) has indicated that the efficiency of MP use for milk production may be too high, or that the amount of MP required for maintenance may be too low (Newbold et al 1994). This experiment was designed to indicate the true efficiency of MP use for milk protein production when metabolisable energy (ME) and MP supplies were balanced.

scholarly journals Validation of protein evaluation systems by means of milk production experiments with dairy cows

1994 ◽  
Vol 42 (2) ◽  
pp. 89-104
Author(s):  
W.M. Van Straalen ◽  
C. Salaun ◽  
W.A.G. Veen ◽  
Y.S. Rijpkema ◽  
G. Hof ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Crude Protein ◽  
Protein Production ◽  
Milk Protein ◽  
Evaluation Systems ◽  
System 2 ◽  
The Difference ◽  
Using Data ◽  
Protein Supply

Protein evaluation systems (crude protein (CP), digestible crude protein (DCP), protein digested in the intestine (PDI), amino acids truly absorbed in the small intestine (AAT), absorbed protein (AP), metabolizable protein (MP), crude protein flow at the duodenum (AAS) and digestible protein in intestine (DVE)) were validated using data from 15 production experiments with dairy cows, carried out in the Netherlands. Only treatments that were deficient in protein according to at least one system were selected. Average yield was 31.2 kg of fat and protein corrected milk daily and 989 g of milk protein daily. The observed milk protein production was compared with milk protein production predicted from the protein supply and requirements in each system. The difference between observed and predicted milk protein production expressed as the absolute and relative prediction error was smallest for the DVE-system (-2 g/day; 5.7%) and increased in the order CP (-22 g/day; 6.7%), PDI (-19 g/day; 7.8%), DCP (-44 g/day; 8.8%), AP(-37 g/day; 9.3%), AAS (100 g/day; 11.7%), AAT (112 g/day; 13.4%) and MP system (204 g/day; 22.9%). Predictions can be improved when a variable efficiency of milk protein production is used. In the DVE-system the observed efficiency decreased with increasing protein to energy ratio in the diet and milk production level. It was concluded that under Dutch conditions the prediction of milk protein production decreased in the order DVE, CP, PDI, DCP, AP, AAS, AAT and MP system.

scholarly journals Supply of nutrients and productive responses in dairy cows given diets based on restrictively fermented silage

1998 ◽  
Vol 7 (2) ◽  
pp. 219-250 ◽  
Author(s):  
Pekka Huhtanen
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Evaluation System ◽  
Milk Protein ◽  
High Efficiency ◽  
Protein Supplementation ◽  
Protein Yield ◽  
Grass Silage ◽  
Body Tissues ◽  
Protein Supply

The objective of this paper is to review research which has evaluated the feeding of dairy cows with diets containing large proportions of grass silage. In Finland, milk production systems evolved are based on the use of restrictively fermented silages. Higher potential yields, smaller production risks than with cereal grains, short grazing period and high digestibility of grasses grown in northern latitudes have facilitated this development. Factors affecting nutrient supply from these diets are discussed. Digestibility is determined mainly by the stage of maturity at harvesting and it is not markedly affected by the level of energy and protein supplementation. Intake of grass silage is influenced both by digestibility and fermentation characteristics. Efficiency of microbial synthesis is high in animals given diets based on restrictively fermented silage but rumen fermentation pattern is characterised by low molar proportions of propionate. Production responses to additional concentrate are relatively small, especially when the amount of concentrate exceeds 10 kg day-1. High substitution of silage dry matter (DM), negative associative effects on digestion and partitioning of energy towards body tissues account for small production responses. Protein supplementation has consistently increased milk protein yield but responses do not appear to be related to the level of milk production, silage crude protein content, amount of concentrate or stage of lactation. The new protein evaluation system provides an accurate prediction of protein yield with the typical Finnish dairy cow diets. The high slopes (ca. 0.5) between protein supply and milk protein yield within experiments suggest that protein supply is suboptimal and protein supplements are used with a high efficiency.

scholarly journals Calcium Propionate Increased Milk Parameters in Holstein Cows

2019 ◽  
Vol 47 (1) ◽  
Author(s):  
William Del Conte Martins ◽  
Sérgio Henrique Mioso Cunha ◽  
André Giarola Boscarato ◽  
Jonhatan Soares De Lima ◽  
Jair Dario Esteves Junior ◽  
...  
Keyword(s):  
Mammary Gland ◽  
Dairy Cows ◽  
Milk Production ◽  
Milk Yield ◽  
Energy Supply ◽  
Metabolic Disorders ◽  
Milk Protein ◽  
Early Lactation ◽  
Protein Levels ◽  
Calcium Propionate

Background: In the early lactation, dairy cows go through a period of negative energy balance because they do not intake enough food to supply the energetic demand of milk production. In this period, dairy cows are susceptible to metabolic disorders, although has little evidence that milk production contribute to increase diseases occurrence. Some alternatives to minimize metabolic disorders, that reduce milk yield, has been suggested, as increase energy density in the diet of dry cows 21 days before the parturition and include additives in the diet pre and post-partum. The aim of this study was to measure the productive parameters in dairy cows fed calcium salts as energetic source.           Materials, Methods & Results: Two Latin square 4x4 were used, whereas one comprehended of early lactation cows and the other of mid lactation cows. Animals of 2nd and 3rd parity were used only. Parity was distributed evenly among groups. The trial consisted of 4 groups with 4 treatments as follow: T1: 300 g of calcium acetate, T2: 200 g of calcium propionate, T3: 200 g of calcium salts of fatty acids, and T4: control without any calcium additive. The animals were milked twice a day, the first milking at 07:00 am and the second milking at 05:00 pm. Milk samples were collected in plastic containers with potassium dichromate. These samples were sent to the Laboratory of Milk Analysis of the Paranaense Association of Breeders of the Holstein Breed for analysis of fat, protein, lactose and total solids through the infrared method. Throughout the experimental period, the daily production of the animals under study was recorded. The production of milk (kg) was corrected to 3.5% fat using the formula PLA 3.5% = (0.432 + kg milk) + (0.1623 x kg milk x fat content).Discussion: Greater supply of glucose or propionate stimulate milk protein production, but the mechanism of this stimulation is unclear. Milk protein is dependent on energy supply, and deficient energy intake reduces milk protein levels. Calcium propionate provided enough energy supply and increased milk protein levels. The synthesis of lactose has influence in water absorption in mammary gland and lactose determine milk osmolarity. The lactose levels vary according blood glucose, somatic cells count and energy availability for physiological processes. In the literature, rarely has been found greater lactose concentration caused by feed intake, becoming very important the results found in this work. The diet energy concentration and consumption rate determine energy intake, which limit milk yield. Dairy cows in early lactation has marked increased of nutrient requirements to support milk production. Support milk lactose synthesis in the mammary gland is the one of responsible for increase of nutrients requirements. In this period, the glucose demands increases 2 times more than during late gestation. Propionate is converted to glucose in the liver and it will be support lactose synthesis in the mammary gland. Propionate supplementation in this work provided better energetic supply and it is possible to consider, evaluating the milk yield. It was concluded that calcium propionate increased milk parameters like: milk protein, lactose and milk fat. Holstein cows fed calcium propionate had greater milk yield than other groups.

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