Hypomagnesaemia in milking cows: the response of serum magnesium to alterations in herbage composition resulting from potash and nitrogen dressing on pasture.

Detailed results presented in this paper were obtained during an experiment reported previously (D.S.A. 21 [872]) and concern relationships between fertilizer treatment of pasture, chemical composition of the herbage and serum Mg levels. A heavy potash dressing caused increases in herbage K and decreases of 15-20% in the Mg level, while a heavy N application increased crude protein and Mg levels in the herbage. There was a significant correlation between serum Mg levels and Mg contents of the herbage in the week preceding blood sampling; in 822 cows no low serum Mg levels were found when the Mg content of the herbage was >0.20%. Negative correlations between serum Mg levels and crude protein or K content were significant. There was no relationship between daily milk yield and serum Mg levels. M.P.H. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Reliability of Milk Recording Data Under Conditions of Automatic Milking System

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun201462050911 ◽

2014 ◽

Vol 62 (5) ◽

pp. 911-917 ◽

Cited By ~ 1

Author(s):

Oto Hanuš ◽

Pavel Hering ◽

Gustav Chládek ◽

Daniel Falta ◽

Petr Roubal ◽

...

Keyword(s):

Dairy Cows ◽

Cell Count ◽

Milk Yield ◽

Somatic Cell Count ◽

Crude Protein ◽

Cattle Breeding ◽

Automatic Milking System ◽

Automatic Milking ◽

Daily Milk Yield ◽

Daily Milk

Automatic milking system (AMS) brings a change in approach to ensure the data reliability in the official milk recording (MR). The AMS is equipped with flowmeter. AMS software provides the daily milk yield (DMY) and average of the last 7 daily milk yields (AVG7) for MR. Classic MR uses DMY. AVG7 could be more reliable value. Origin of both records (DMY and AVG7) is from AMS flowmeter. The aim of paper was to compare the values of milk yield of cows from daily (DMY) and the extended records (AVG7) from AMS for objective assess of lactations to be used in cattle breeding. Study (2013) with 2 AMS herds (DeLaval and Lely Astronaut): herd 1 – Holstein (H) dairy cows; herd 2 – Czech Fleckvieh (CF) dairy cows. There were following milk records: n = 521 DeLaval (H); n = 567 Lely Astronaut (CF); 70 (H) and 68 (CF) dairy cows. MR samples were analyzed on: fat content; crude protein; somatic cell count. Correlations between AVG7 and DMY were: 0.888 (H); 0.898 (CF, both P ≤ 0.001). There were insignificant differences (P > 0.05; −0.07 ± 3.29 kg for H and 0.28 ± 3.3 kg for CF) between AVG7 and DMY for both robots. The same is valid for differences in the production of milk components. According to this comparison experiment the AVG7 of AMS is a suitable equivalent for the DMY regarding official MR for assessment of lactations.

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The influence of dietary protein intake during lactation on the reproductive performance of sows

Animal Science ◽

10.1017/s0003356100028440 ◽

1969 ◽

Vol 11 (4) ◽

pp. 443-451 ◽

Cited By ~ 11

Author(s):

R. M. MacPherson ◽

F. W. H. Elsley ◽

R. I. Smart

Keyword(s):

Milk Yield ◽

Crude Protein ◽

Dry Matter ◽

Live Weight ◽

Large White ◽

Treatment Groups ◽

Milk Samples ◽

Daily Milk Yield ◽

Daily Milk

SUMMARY1. Forty-five Large White gilts were given 2·20 kg daily of a diet containing 14·0% crude protein during three successive pregnancies. During a 6-week lactation they received 5·30 kg daily of one of three diets containing 19·0% (HP), 16·5% (MP) or 14·0% (LP) crude protein.2. Daily milk yield was estimated on the 10th, 20th, 30th and 40th day of lactation. Milk samples were obtained from the same sows for the determination of protein, fat, lactose and total solids on the 11th, 21st, 31st and 41st day.3. One sow and litter from each treatment in each lactation was placed in metabolism cages during lactation and estimates of nitrogen and dry matter excretion obtained.4. As the concentration of protein in the diet decreased the average 42-day gain in litter weight from birth increased significantly in the first lactation. This trend continued in the second lactation although it was not significant but did not appear in the third.5. There was no marked difference in daily milk yield between treatment groups.6. There was a significantly greater loss of live weight by the sows on the lower levels of protein in the first lactation. These differences were not significant in the second and third lactations.

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Substantiation of the criterion of relationship of sugars with starch and structural carbohydrates to crude protein in the rations of cows

Feeds and Feed Production ◽

10.31073/kormovyrobnytstvo202089-18 ◽

1970 ◽

pp. 181-193

Author(s):

M.F. Kulik ◽

T.O. Didorenko ◽

V.P. Zhukov ◽

Y.V. Obertiukh ◽

I.O. Vygovska

Keyword(s):

Energy Balance ◽

Milk Yield ◽

Crude Protein ◽

Corn Starch ◽

Animal Feed ◽

Sugar Fermentation ◽

Protein Energy ◽

Daily Milk Yield ◽

Relationship Of ◽

Daily Milk

Purpose. The past and present interpretation of any ratio of sugar to protein in the diet of cows of different productivity levels is unfounded. The period of sugar fermentation in the first hour after consumption of feed by cows is not subject to discussion, and in the next 6-7 hours before re-distribution of feed starch and pectins are fermented, and then hemicellulose, cellulose (crude fiber). That is, the necessary criterion for combining all fractions of carbohydrates. Methods. The substantiation of the criterion of ratio of sugars with starch and structural carbohydrates to crude protein is based on the ratio of milk protein energy to lactose energy, which is 1 to 1.25 in milk of cows with daily milk yield of 40 l and fermentation period of sugars, starch and structural carbohydrates in rumen. Because the cow rumen is an open system of microbial protein synthesis, the ratio of 1 to 1.25 is intermittent and variable. When fermenting sugar, starch and structural carbohydrates in the rumen, energy losses are known to be 15 % and then the ratio will be 1 to 1.4. The use of ATP similar to the use of energy is within 80 % and the ratio will change from 1 to 1.6. Results. Digestibility of dry corn starch in the rumen is 50 % and other cereals 77-80 %, then we have a total digestibility of 70 %, which will increase by 30 % the need for starch or it will be 6.8 kg. In this analysis of the energy balance, the ratio of crude protein to sugar, starch and part of the structural carbohydrates will be 1 to 1.7, and in natural terms (kg) 1 to 2.2. Free sugars degraded in the rumen for 30 minutes, the remaining time starch and structural carbohydrates at 3-time distribution of animal feed. Conclusions. In the energy balance, the ratio of sugars to starch and structural carbohydrates should be 10 % for sugar, 80 % starch and 10 % structural carbohydrates. For cows with a productivity of 40 liters of daily milk yield in the diet should be 1.5 kg of molasses (0.65 kg of sugar) and 6.8 kg of digestible in the rumen starch of grain components and 10 % of energy during fermentation of structural carbohydrates.

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Evaluation by milk production of sunflower oilcake, extruded and expanded soybean in the diets of cows

Feeds and Feed Production ◽

10.31073/kormovyrobnytstvo201987-15 ◽

2019 ◽

pp. 102-107

Author(s):

K. S. Yakyvchuk

Keyword(s):

Milk Production ◽

Milk Yield ◽

Crude Protein ◽

Daily Milk Yield ◽

Daily Milk

The results of studies on evaluation of milk production of sunflower milk, extruded and expanded soybeans in the diets of cows are presented. It has been found that the assessment of feeds in milk production by crude protein and starch with sugar indicates that the diet is balanced by raw protein and easily fermented carbohydrates and provides an average daily milk yield of 26 liters by crude protein and 28.7 liters by starch with sugar.

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Effect of Bypass Protein on Milk Production and Economic of Lactating Crossbred Cows

Journal of AgriSearch ◽

10.21921/jas.v7i01.17633 ◽

2020 ◽

Vol 7 (01) ◽

Author(s):

RATNESH K CHOUDHARY ◽

A Saran ROY ◽

N K SINGH3 ◽

SANJAY KUMAR ◽

RAUSHAN K SINGH

Keyword(s):

Milk Production ◽

Milk Yield ◽

Crossbred Cows ◽

Lactating Cows ◽

Feed Cost ◽

Total Diet ◽

T1 And T2 ◽

Daily Milk Yield ◽

On Farm ◽

Daily Milk

An On-Farm Trial was conducted on 24 lactating crossbred cows for assessment of feeding formaldehyde treated mustard cake (bypass protein) on milk production and economic analysis of lactating cow. Cows were divided into three groups having 8 cows each, treatments were farmers’ practice (FP); (Control): The lactating animals under this group were fedas per the feeding schedule of the farmers (5 kg. dry roughage as rice straw + 6 hrs grazing as local grass and 4 kg. commercial concentrates), T1: The lactating animals under this group were fed as per farmers practicewith 12% mustard cake of total diet was provided to the cow by replacing the same amount of commercial concentrates andT2: The lactating animals under this group were fed as per farmers practicewith 12% formaldehyde treated mustard cake of total diet was provided to the cow by replacing same amount of commercial concentrates. The average daily milk yield of lactating cows under FP, T1 and T2 was 8.58, 8.82 and 9.85 kg per cow, respectively. Differences between FP and T2 were significant. The daily increase in milk yield was 1.27 kg and 1.03 kg in cows fed T2diet over the cows fed FP and T1diet, respectively. The B: C ratios for FP, T1 and T2 groups were 2.6, 3.0 and 3.3, respectively. The feed cost reduced in T2 group by Rs. 8.64 and increased milk production by 1.27 kg in respect to FP group.

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Daily milk yield prediction of dairy cows based on the GA-LSTM algorithm

2020 15th IEEE International Conference on Signal Processing (ICSP) ◽

10.1109/icsp48669.2020.9320926 ◽

2020 ◽

Author(s):

Wenli Zhang ◽

Kun Yang ◽

Naigong Yu ◽

Tingting Cheng ◽

Jichao Liu

Keyword(s):

Dairy Cows ◽

Milk Yield ◽

Yield Prediction ◽

Daily Milk Yield ◽

Daily Milk

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Novel Genes Associated with Dairy Traits in Sarda Sheep

Animals ◽

10.3390/ani11082207 ◽

2021 ◽

Vol 11 (8) ◽

pp. 2207

Author(s):

Michele Pazzola ◽

Giuseppe Massimo Vacca ◽

Pietro Paschino ◽

Giovanni Bittante ◽

Maria Luisa Dettori

Keyword(s):

Association Analysis ◽

Milk Yield ◽

Dairy Traits ◽

Breeding Schemes ◽

Milk Coagulation ◽

Set Up ◽

A Minor ◽

Daily Milk Yield ◽

Breed Sheep ◽

Daily Milk

The aim of the present research was to analyze the variability of 45 SNPs from different genes involved in metabolism and innate immunity to perform an association analysis with the milk yield, composition and milk coagulation traits. A population of 1112 Sarda breed sheep was sampled. Genotyping was generated by a TaqMan Open ArrayTM. Thirty out of the 45 SNPs were polymorphic, and 12 displayed a minor allele frequency higher than 0.05. An association analysis showed that the variability at genes PRKAG3 and CD14 was significantly associated with the daily milk yield. The variability at PRKAG3 was also associated with the protein and casein content, somatic cell score and bacterial score. The variation at the PRKAA2 gene was associated with the milk lactose concentration. The SNPs at CD14 were also associated with the traditional milk coagulation properties, while the SNPs at GHR and GHRHR were associated with kSR, a derived coagulation parameter related to the rate of syneresis. The information provided here is new and increases our knowledge of genotype–phenotype interactions in sheep. Our findings might be useful in appropriate breeding schemes to be set up for the Sarda sheep breed, but these should be confirmed by further studies, possibly performed on independent populations.

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Effects of Sprinkler Flow Rate on Physiological, Behavioral and Production Responses of Nili Ravi Buffaloes during Subtropical Summer

Animals ◽

10.3390/ani11020339 ◽

2021 ◽

Vol 11 (2) ◽

pp. 339

Author(s):

Musa Bah ◽

Muhammad Afzal Rashid ◽

Khalid Javed ◽

Talat Naseer Pasha ◽

Muhammad Qamer Shahid

Keyword(s):

Heat Stress ◽

Milk Yield ◽

Flow Rate ◽

Rectal Temperature ◽

Latin Square ◽

Flow Rates ◽

Group Water ◽

Humidity Index ◽

Daily Milk Yield ◽

Daily Milk

Water buffaloes wallow in water to combat heat stress during summer. With the decreasing reservoirs for wallowing, the farmers use sprinklers to cool the buffaloes in Pakistan. These sprinklers use a large quantity of groundwater, which is becoming scarce. The objective of the current study was to determine the effect of different sprinkler flow rates on the physiological, behavioral, and production responses of Nili Ravi buffaloes during summer. Eighteen buffaloes were randomly subjected to three sprinkler flow rate treatments in a double replicated 3 × 3 Latin square design. The flow rates were 0.8, 1.25, and 2.0 L/min. During the study, the average afternoon temperature humidity index was 84.6. The 1.25 and 2.0 L/min groups had significantly lower rectal temperature and respiratory rates than the 0.8 L/min group. Water intake was significantly higher in the 0.8 L/min group. Daily milk yield was higher in the 1.25 and 2.0 L/min groups than in the 0.8 L/min group. These results suggested that the sprinkler flow rates > 0.8 L/min effectively cooled the buffaloes. The sprinkler flow rate of 1.25 L/min appeared to be more efficient, as it used 37.5% less water compared to the 2.0 L/min.

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Milk production and its relationship with milk composition, body and udder morphological traits in Bedouin goat reared under arid conditions

Acta Scientiarum Animal Sciences ◽

10.4025/actascianimsci.v41i1.42552 ◽

2018 ◽

Vol 41 (1) ◽

pp. 42552

Author(s):

Fatima Kouri ◽

Salima Charallah ◽

Amina Kouri ◽

Zaina Amirat ◽

Farida Khammar

Keyword(s):

Body Weight ◽

Milk Production ◽

Milk Yield ◽

Milk Fat ◽

Morphological Traits ◽

Growth Traits ◽

Average Daily Gain ◽

Arid Conditions ◽

Daily Milk Yield ◽

Daily Milk

This research aims to assess the performances of lactating Bedouin goat under arid conditions, focusing on the relationship of milk yield with body and udder morphology and growth traits. Fourteen goats and their kids were followed during early lactation (90 days post-partum). Mean daily milk yield was 0.56 kg. Milk fat, proteins, lactose, solids non-fat and minerals were respectively 34.9, 38.9, 48.8, 107 and 6.7 g L-1. Mean kids’ birth weight, adjusted body weight at 90 days of age and average daily gain were respectively 2 kg, 6.6 kg and 51.4 g day-1. Daily milk yield was correlated with goats’ body weight, withers height, rump height, udder width and udder circumference but not with linear udder score and growth performances. These results provide important data about the milk production of Bedouin goat emphasizing its correlation with body and udder morphological traits which can help to elaborate a specific breeding program for this breed.

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