Lactation Curve
Studies on some factors influencing the shape of the lactation curve in Romanian Black and White cows
... the lactation curve for milk yield, milk fat percentage, milk protein percentage and milk lactose ...the lactation curves were drawn taking into consideration the effect of farm (farm 1 and farm 2) ...
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Estimating the Lactation Curve on a.m./p.m. Milkings in Dairy Cows
... We could state that estimating milk production per normal lactation either by using the lactation curve parameters or/and using the a.m. and p.m. milkings is providing similar results, at an average ...
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A link function approach to model heterogeneity of residual variances over time in lactation curve analyses
... Several studies with test-day models for the lactation curve show heterogeneity of residual variance over time. The most common approach is to divide the lacta- tion length into subclasses, assuming ...
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Associations between the time of conception and the shape of the lactation curve in early lactation in Norwegian dairy cattle
... The strength of the current study, using a large representative database and a large sample size, is that the results can be implemented on the study popula- tion of Norwegian dairy cattle. One must consider, however, ...
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Contrasting models for lactation curve analysis
... Model comparisons. The aim was to compare the performance of random regression and character pro- cess in modeling genetic and permanent environmen- tal parts for lactation curve analysis. In a first analy- ...
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The application of a mechanistic model to analyze the factors that affect the lactation curve parameters of dairy sheep in Mexico
... Lambing number effects on total milk yield (L) and maximum secretion potential (MSmax) of. 410[r] ...
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Comparative evaluation of a new lactation curve model for pasture based Holstein Friesian dairy cows
... DATA1 = Test-day data Tasmania; DATA2=Test-day data Victoria; Error = Mean residuals difference between daily actual and predicted milk yield per test-day for every cow; SDe = standard e[r] ...
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INDICES FOR THE QUANTITATIVE AND QUALITATIVE MILK PRODUCTION DURING THE MAXIMAL PHASE OF THE LACTATION CURVE
... maximum lactation was noticed, in three consecutive days, was considered for recording the main qualitative and quantitative ...same lactation interval, the same quantitative traits were studied in dynamics ...
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Using Geometric Morphometrics to Quantify Variation of Shape and Magnitude of the Pattern of Milk Production of Dairy Cattle
... any lactation pattern as any other biological shape and being able to appropriately measure it, may not only complement to the analysis by mathematical models, but also reveal profound information about the ...
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Dairy cattle management: survey on dairy cattle lactation trend in Sabah
... The experimental design is to arrange the collected raw data and put them into standard tables. It is so to make every of the tables comparable to each other as the raw samples from the farmers have different pattern of ...
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Seasonal influences on milk yield and composition dynamics during a normal lactation in dairy cows. Milk lactose, solids non fat, total dry matter percentage
... of lactation curves were calculated using the mathematical model proposed by Wood in 1967, called the incomplete gamma ...function. Lactation curve for lactose percentage was very different among ...
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Study of individual lactation patterns of Iranian dairy buffaloes
... tion curve shape improvement through selective breed- ...the lactation curve of Khuzestani bu ff aloes but the other Iranian bu ff alo ecotypes remain to be comprehensively ...individual ...
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Effect of Parity on Dynamics of Milk Yield and Composition during Normal Lactation in Dairy Cows
... peak lactation curve was obtained from cows in lactation 3, being ...in lactation 4 had the smallest parameter of only ...kg. Lactation curve aspect is of particular importance ...
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Analysis of the characteristics of the lactation curves in a group of high producing dairy farms in New Zealand : a thesis presented in partial fulfilment of the requirements for the degree of Master of Applied Science (MApplSci) in Pastoral Science, Institute of Natural Resources, Massey University, Palmerston North, New Zealand
... of lactation and the factors affecting it, in selected seasonal supply dairy farms in New ...the lactation curve components (peak yield, rate of decline and persistency), on the methods employed to ...
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Seasonal Influences on Milk Yield and Composition Dynamics during a Normal Lactation in Dairy Cows: Milk Yield, Fat and Protein Precentage
... Growth rate of daily milk production (parameter b) had the lowest value (0.011 kg) from cows that calved in summer and 0,023 kg in autumn calved cows. The value of this parameter is obtained from cows that have calved in ...
6
Linking first lactation survival to milk yield and components and lactation persistency in Tunisian Holstein cows
... pre-established lactation curve shape traits, i.e. by defining the lactation persistency as the ability to maintain constant yield during lactation (Gengler, 1996) or in the context of linking ...
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Factors for improving reproductive performance of sows and herd productivity in commercial breeding herds
... Information relating to herd management factors in- clude gilt development programs, insemination timings, farrowing and lactation management, farrowing spaces and culling guidelines. For example, analysis of ...
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Supplementing dairy ewes grazing low quality pastures with plant-derived oils and rumen-protected EPA+DHA pellets improves lactation traits and body condition score
... An outstanding enhancement of milk yield by approximately 30% compared to the control animals was observed in ewes supplemented with RPO. Increases in fat (13%) and protein (31%) were also observed. These incremental ...
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How seasonal dairy farmers in the Lower North Island of New Zealand achieve high per cow production : a participatory case study : a thesis presented in partial fulfilment of the requirements of the degree of Master of Agricultural Science in Farm Management, at Massey University, Palmerston North
... The results suggest that while the resources available to the farmers influenced per cow production, they did not constrain the achievement of high per cow production. Farmers strategically managed the resources ...
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Nutrition and Management Strategies for Improving Performance and Health of Sows and Nursery Pigs.
... Monovette tube (Sarstedt, Newton, NC) and centrifuged at 3,000 x g for 15 min at 4°C to obtain serum. Serum samples at d 1 and 18 of lactation were sent to a commercial laboratory (Antech Diagnostics, Cary, NC) ...
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