Early lactation feed intake and milk yield responses of dairy cows offered grass silages harvested at early maturity stages

The lasalocid supplement, Bovatec, was fed to dairy cows at 300 mg of active ingredient for ~3 weeks precalving to up to 16 weeks postcalving in a pasture-based system. Sixty primiparous cows and 120 multiparous cows were allocated to equivalent control and lasalocid groups based on expected calving date, size and previous production history. To facilitate the feeding of the lasalocid, it was mixed with maize silage (~1 kg DM/cow.day) and fed as one feed on a concrete feed pad early in the morning each day before calving and before the afternoon milking during lactation. The control group received the maize silage without lasalocid. Otherwise, the feeding of both groups was exactly the same. The key response associated with adding lasalocid to the diet differed between the primiparous and multiparous cows. Although the average daily milk yield responses to lasalocid were not significant (P > 0.05) at 1.1 and 0.6 kg/cow for the primiparous and multiparous cows, respectively, significant (P < 0.05) increases in the milk yield of the primiparous cows were consistently recorded between weeks 5 and 15 of lactation. With the multiparous cows, there was a significant (P < 0.05) decrease in the circulating concentrations of serum β-hydroxybutyrate in those fed the lasalocid, with this being related to a tendency (P = 0.087) for these animals to maintain higher body condition scores for much of the early lactation treatment period. There were no other treatment differences of biological importance.

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Effect of changes in diet energy density on feed intake, milk yield and metabolic parameters in dairy cows in early lactation

animal ◽

10.1017/s1751731107683815 ◽

2007 ◽

Vol 1 (3) ◽

pp. 335-346 ◽

Cited By ~ 10

Author(s):

N.I. Nielsen ◽

N.C. Friggens ◽

T. Larsen ◽

J.B. Andersen ◽

M.O. Nielsen ◽

...

Keyword(s):

Energy Density ◽

Dairy Cows ◽

Milk Yield ◽

Feed Intake ◽

Metabolic Parameters ◽

Early Lactation

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Feed intake, milk yield and metabolic status of early-lactation Swedish Holstein and Swedish Red dairy cows of different parities fed grass silage and two levels of byproduct-based concentrate

Livestock Science ◽

10.1016/j.livsci.2020.104304 ◽

2020 ◽

Vol 242 ◽

pp. 104304

Author(s):

Johanna Karlsson ◽

Mikaela Lindberg ◽

Maria Åkerlind ◽

Kjell Holtenius

Keyword(s):

Dairy Cows ◽

Milk Yield ◽

Feed Intake ◽

Metabolic Status ◽

Early Lactation ◽

Grass Silage

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Effects of malic acid on feed intake, milk yield, milk components and metabolites in early lactation Holstein dairy cows

Livestock Science ◽

10.1016/j.livsci.2009.01.016 ◽

2009 ◽

Vol 124 (1-3) ◽

pp. 182-188 ◽

Cited By ~ 7

Author(s):

C. Wang ◽

Q. Liu ◽

W.Z. Yang ◽

Q. Dong ◽

X.M. Yang ◽

...

Keyword(s):

Dairy Cows ◽

Milk Yield ◽

Feed Intake ◽

Malic Acid ◽

Early Lactation ◽

Milk Components ◽

Holstein Dairy Cows

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The Milk Yield Response to Frequent Milking in Early Lactation of Dairy Cows Is Locally Regulated

Journal of Dairy Science ◽

10.3168/jds.s0022-0302(07)71555-2 ◽

2007 ◽

Vol 90 (2) ◽

pp. 716-720 ◽

Cited By ~ 32

Author(s):

E.H. Wall ◽

T.B. McFadden

Keyword(s):

Dairy Cows ◽

Milk Yield ◽

Yield Response ◽

Early Lactation

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Association of Feed Efficiency, Feeding Rate, and Behaviour with the Milk Performance of Dairy Cows

Dairy ◽

10.3390/dairy2040053 ◽

2021 ◽

Vol 2 (4) ◽

pp. 684-694

Author(s):

Lenka Krpálková ◽

Niall O’Mahony ◽

Anderson Carvalho ◽

Sean Campbell ◽

Gerard Corkery ◽

...

Keyword(s):

Dairy Cows ◽

Milk Production ◽

Milk Yield ◽

Feed Intake ◽

Feed Efficiency ◽

Feeding Behaviour ◽

Feeding Rate ◽

Feeding Time ◽

Feed Conversion ◽

Milk Performance

Identification of the associations of cow feed efficiency with feeding behaviour and milk production is important for supporting recommendations of strategies that optimise milk yield. The objective of this study was to identify associations between measures of feed efficiency, feed intake, feeding rate, rumination time, feeding time, and milk production using data collected from 26 dairy cows during a 3 month period in 2018. Cows averaged (mean ± standard deviation) 2.2 ± 1.7 lactations, 128 ± 40 days in milk, 27.5 ± 5.5 kg/day milk, 1.95 ± 0.69 kg feed/1 kg milk—the measure used to express feed conversion ratio (FCR), 575 ± 72 min/day rumination time, and 264 ± 67 min/day feeding time during the observation period. The coefficient of variation for rumination time (min/d) was 12.5%. A mixed linear model was selected for analyses. The most feed inefficient cows with the highest FCR (≥2.6 kg feed/1 kg milk) showed the lowest milk yield (24.8 kg/day), highest feed intake (78.8 kg), highest feeding rate (0.26 kg/min) and BCS (3.35 point). However, the relative milk yield (milk yield per 100 kg of body weight) was the highest (4.01 kg/day) in the most efficient group with the lowest FCR (≤1.4 kg feed/1 kg milk). Our study showed that the most efficient cows with the lowest FCR (≤1.4 kg feed/1 kg milk) had the highest rumination time (597 min/day; p < 0.05), feeding time (298 min/day; p < 0.05), rumination/activity ratio (4.39; p < 0.05) and rumination/feeding ratio (2.04; p < 0.05). Less active cows (activity time 164 min/day; p < 0.05) were the most efficient cows with the lowest FCR (≤1.4 kg feed/1 kg milk). The behavioural differences observed in this study provide new insight into the association of feed behaviour and feed efficiency with milk performance. Incorporating feeding behaviour into the dry matter intake model can improve its accuracy in the future and benefit breeding programmes.

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Pengaruh Pemberian Ransum dengan Kualitas Berbeda Terhadap Profil Darah, Produksi Susu dan Pertambahan Bobot Badan Sapi Perah

Sains Peternakan ◽

10.20961/sainspet.v6i1.4940 ◽

2017 ◽

Vol 6 (1) ◽

pp. 26 ◽

Cited By ~ 1

Author(s):

Aqni Hanifa

Keyword(s):

Dairy Cows ◽

Milk Yield ◽

Feed Intake ◽

Protein Intake ◽

Crude Protein ◽

Dry Matter ◽

Dietary Quality ◽

Blood Profile ◽

Hb Concentration

<div class="Section1">An experiment was conducted to study blood profile, milk yield and liveweight gain of dairy cows as affected by dietary different quality of diets. The experiment used 15 lactating PFH were assigned into three treatments of diets and</div> five replication, three treatments of diets were : 1) T1 (CP 12% dan TDN 65%); 2) T2 (CP 14% dan TDN 70%) dan 3) T3 (CP 16% dan TDN 75%).The results of this experiment showed that the average of dry matter (DM) intake on Tl, T2 and T3 treatments were 8,59; 10,03 and 10,94 kg/d, respectively (P<0,01). The average of crude protein intake (CP) on T1, T2 and T3 treatments were 1,06; 1,44 and 1,71 kg/d (P<0,01), also the average of TDN intake on T1, T2 and T3 treatments were 5,52; 6,86 and 8,02 kg/d (P<0,01). The average of Hemoglobin (Hb) concentration on T1, T2 and T3 treatments were 10,21: 11,18 and 10,44 g/dl (P>0,05), also the average of eritrosit value on TI, T2 and T3 treatments were 3,37; 3,73 and 3,48 million/mm3;, respectively (P>0,05). The average of milk yield on T1, T2 and T3 treatments were 8,12; 11,29 and 13,42 l/d (P<0,05). The average of liveweight gain on TI, T2 and T3 treatments were 81,66; 117,71 and 320,00 g/d (P>0,05). The conclusions of this research was the highest level of CP and "1'DN in diets (CP 16% and TDN 75%) showed that feed intake (DM, CP and TDN) and milk yield gave the best than other treatments. Different dietary quality of diets altered significant on feed intake (DM, CP and TDN) and milk yield, but the treatments did not affect on liveweight gain, Fib and eritrosit concentration. Key words : diets quality, feed intake, blood profile, milk yield, liveweight gain, dairy cows

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