The Experts below are selected from a list of 15303 Experts worldwide ranked by ideXlab platform
J. R. Roche - One of the best experts on this subject based on the ideXlab platform.
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Effects of far-off and close-up transition Cow Feeding on uterine health, postpartum anestrous interval, and reproductive outcomes in pasture-based dairy Cows
Journal of Animal Science and Biotechnology, 2020Co-Authors: S. Meier, B. Kuhn-sherlock, A. Heiser, M. D. Mitchell, M. A. Crookenden, M. Vailati Riboni, J. J. Loor, J. R. RocheAbstract:Background In seasonal, pasture-based, dairy production systems, Cows must recover from calving and become pregnant within two to 3 months. To achieve this, the uterus must involute and ovulation must occur and continue at regular intervals. As these processes are affected by the Cows’ nutritional or metabolic status post-calving, the objective of this study was to evaluate the effect of Cow Feeding strategies on uterine health, the length of postpartum anestrous interval, and reproductive outcomes. The treatments consisted of two Feeding strategies during late-lactation and early dry period (far-off period; starting 4-month pre-calving) and three close-up dry period Feeding regimes (1-month pre-calving) in a 2 × 3 factorial arrangement. We randomly assigned 150 Cows to one of two far-off treatments. During late lactation, the herds ( n = 75 Cows per herd) were either control-fed (Controlfed) or over-fed (Overfed) to achieve a low or high body condition score (4-month pre-calving; BCS; ~ 4.25 and ~ 4.75; 10-point scale) at cessation of lactation. Within each of these treatments, three Feeding levels were applied during the close-up period (1-month pre-calving): ~ 65% (Feed65), ~ 90% (Feed90), or ~ 120% (Feed120) of metabolizable energy (ME) intakes relative to pre-calving requirements. Results Uterine health improved (i.e. polymorphonucleated (PMN) cells declined) with increased Feeding during the close-up period for Cows in the Overfed group. The reverse was evident for the Controlfed group with the greatest PMN at the highest intakes during the close-up period. The postpartum anoestrous interval (PPAI) was shorter in Cows from the Overfed group when moderately fed (Feed90) during the close-up period; in comparison, the PPAI was shorter in the Controlfed group, when those Cows were overfed in the close-up period (Feed120). The Cows in the Overfed treatment had greater conception and pregnancy rates if Cows had moderate dry matter intakes (Feed90) during the close-up period; these reproductive variables were less under excessive feed intakes (Feed120); yet, close-up dry matter intake had little effect on conception and pregnancy rates for the Controlfed group. Conclusions The far-off Feeding strategies increased early reproductive outcomes at 3 weeks of mating. Additionally, the interaction between far-off and close-up Feeding strategies resulted in high six-week pregnancy rate with a slight restriction during the close-up period but only in the far-off Overfed group. Thus, our hypothesis is supported under these conditions.
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Effects of far-off and close-up transition Cow Feeding on uterine health, postpartum anestrous interval, and reproductive outcomes in pasture-based dairy Cows.
Journal of animal science and biotechnology, 2020Co-Authors: S. Meier, B. Kuhn-sherlock, A. Heiser, M. D. Mitchell, M. A. Crookenden, M. Vailati Riboni, J. J. Loor, Jane K. Kay, J. R. RocheAbstract:In seasonal, pasture-based, dairy production systems, Cows must recover from calving and become pregnant within two to 3 months. To achieve this, the uterus must involute and ovulation must occur and continue at regular intervals. As these processes are affected by the Cows’ nutritional or metabolic status post-calving, the objective of this study was to evaluate the effect of Cow Feeding strategies on uterine health, the length of postpartum anestrous interval, and reproductive outcomes. The treatments consisted of two Feeding strategies during late-lactation and early dry period (far-off period; starting 4-month pre-calving) and three close-up dry period Feeding regimes (1-month pre-calving) in a 2 × 3 factorial arrangement. We randomly assigned 150 Cows to one of two far-off treatments. During late lactation, the herds (n = 75 Cows per herd) were either control-fed (Controlfed) or over-fed (Overfed) to achieve a low or high body condition score (4-month pre-calving; BCS; ~ 4.25 and ~ 4.75; 10-point scale) at cessation of lactation. Within each of these treatments, three Feeding levels were applied during the close-up period (1-month pre-calving): ~ 65% (Feed65), ~ 90% (Feed90), or ~ 120% (Feed120) of metabolizable energy (ME) intakes relative to pre-calving requirements. Uterine health improved (i.e. polymorphonucleated (PMN) cells declined) with increased Feeding during the close-up period for Cows in the Overfed group. The reverse was evident for the Controlfed group with the greatest PMN at the highest intakes during the close-up period. The postpartum anoestrous interval (PPAI) was shorter in Cows from the Overfed group when moderately fed (Feed90) during the close-up period; in comparison, the PPAI was shorter in the Controlfed group, when those Cows were overfed in the close-up period (Feed120). The Cows in the Overfed treatment had greater conception and pregnancy rates if Cows had moderate dry matter intakes (Feed90) during the close-up period; these reproductive variables were less under excessive feed intakes (Feed120); yet, close-up dry matter intake had little effect on conception and pregnancy rates for the Controlfed group. The far-off Feeding strategies increased early reproductive outcomes at 3 weeks of mating. Additionally, the interaction between far-off and close-up Feeding strategies resulted in high six-week pregnancy rate with a slight restriction during the close-up period but only in the far-off Overfed group. Thus, our hypothesis is supported under these conditions.
Claire Agabriel - One of the best experts on this subject based on the ideXlab platform.
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Potential of milk fatty acid composition to predict diet composition and authenticate Feeding systems and altitude origin of European bulk milk
Journal of Dairy Science, 2015Co-Authors: Mauro Coppa, Ton Baars, Claire Agabriel, Chantal Chassaing, Anne Ferlay, Claire Laurent, Giorgio Borreani, R. Barcarolo, D. Kusche, Odd Magne HarstadAbstract:The aims of this work were to elucidate the potential of using milk fatty acid (FA) concentration to predict Cow diet composition and altitude of bulk milk collected in 10 different European countries and to authenticate Cow-Feeding systems and altitude of the production area using a data set of 1,248 bulk Cow milk samples and associated farm records. The predictions based on FA for Cow diet composition were excellent for the proportions of fresh herbage [coefficient of determination (R-2) = 0.81], good for hay, total herbage-derived forages, and total preserved forages (R-2 > 0.73), intermediate for corn silage and grass silage (R-2 > 0.62), and poor for concentrates (R-2 < 0.51) in the Cow diet. Milk samples were assigned to groups according to Feeding system, level of concentrate supplementation, and altitude origin. Milk FA composition successfully authenticated Cow-Feeding systems dominated by a main forage (>93% of samples correctly classified), but the presence of mixed diets reduced the discrimination. Altitude prediction reliability was intermediate (R-2
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Potential of milk fatty acid composition to predict diet composition and authenticate Feeding systems and altitude origin of European bulk milk
Journal of Dairy Science, 2014Co-Authors: Mauro Coppa, Ton Baars, Claire Agabriel, C. Chassaing, Anne Ferlay, Claire Laurent, Giorgio Borreani, R. Barcarolo, D. Kusche, Odd Magne HarstadAbstract:The aims of this work were to elucidate the potential of using milk fatty acid (FA) concentration to predict Cow diet composition and altitude of bulk milk collected in 10 different European countries and to authenticate Cow-Feeding systems and altitude of the production area using a data set of 1,248 bulk Cow milk samples and associated farm records. The predictions based on FA for Cow diet composition were excellent for the proportions of fresh herbage [coefficient of determination (R2)=0.81], good for hay, total herbage-derived forages, and total preserved forages (R2>0.73), intermediate for corn silage and grass silage (R2>0.62), and poor for concentrates (R2 93% of samples correctly classified), but the presence of mixed diets reduced the discrimination. Altitude prediction reliability was intermediate (R2
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using visible or near infrared spectroscopy nirs on cheese to authenticate Cow Feeding regimes
Food Chemistry, 2013Co-Authors: D Andueza, Claire Agabriel, I. Constant, A Lucas, B MartinAbstract:Abstract An experiment was conducted to evaluate the ability of two spectroscopy methods to distinguish between pasture and preserved-forage cheeses. The reflectance spectra of 308 fresh and freeze-dried samples of Cow’s milk cheeses were recorded at wavelengths in the range of the visible, using a portable MINOLTA CM-2002 spectrophotometer. The reflectance spectra of the same samples were also measured in near infrared range using a non-portable laboratory monochromator NIRSystem 6500. The proportion of cheeses correctly classified by NIRS and visible spectra was respectively 0.96 and 0.91 for pasture samples, and 0.96 and 0.79 for preserved-forage samples. No significant differences were found when fresh and freeze-dried cheeses were compared. We conclude that NIRS is able to classify cheese samples from different regimes (here, pasture vs. preserved-forage).
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Authentication of Cow Feeding and geographic origin on milk using visible and near-infrared spectroscopy.
Journal of Dairy Science, 2012Co-Authors: Mauro Coppa, Bruno Martin, Claire Agabriel, C. Chassaing, Cécile Sibra, I. Constant, Benoît Graulet, Donato AnduezaAbstract:The ability of near-infrared spectroscopy to trace Cow Feeding systems and farming altitude was tested on 486 bulk milk samples from France and northwestern Italy. Milks were grouped into Feeding systems according to the main forage in the diet. Partial least square discriminant analysis correctly classified 95.5, 91.5, and 93.3% of pasture versus maize silage, hay, and fermented herbage Feeding systems, respectively. Discrimination was slightly less successful when diets with large proportions of the nondominant forage were included in each group. Near-infrared spectroscopy correctly discriminated no-pasture from pasture milk, even with only 30% of pasture in the diet (5.4% cross-validation error), and the error stabilized when pasture exceeded 70% (2.5% error). Near-infrared spectroscopy did not reliably trace milk geographic origin when the Feeding system effect was isolated from the altitude effect. These findings may be usefully exploited for the authentication of dairy products.
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Effect of dairy production systems on the sensory characteristics of Cantal cheeses: a plant-scale study
Animal Research, 2004Co-Authors: Claire Agabriel, Bruno Martin, Cécile Sibra, Jean-claude Bonnefoy, Marie-christine Montel, Robert Didienne, Sophie HulinAbstract:A study was conducted to verify whether bulk milk produced according to specific conditions of production would lead to distinctive cheeses. Milk from two groups of farms that mainly differ in their level of intensification of dairy Cow and forage area management was processed into cheese in the same Cantal dairy plant, during 4 periods of 3 consecutive days each. The milk chemical composition differed little between the two producing groups whereas the differences were greater between the processing periods because of the combined effects of the season, the mean lactation stage of the herds and Cow Feeding. Major chemical and microbiological differences were noted in ripened cheeses according to the cheesemaking period, especially between cheeses made in the winter and in the summer. The cheesemaking period and ripening time (6, 13 and 23 weeks) accounted for most of the variance noted in all the sensory characteristics of the cheeses, whereas the production system had a far lesser impact. With regards to odour and aroma, the spring and winter cheeses differed from the autumn and summer ones. With time, the cheeses became softer and melted more and tasted saltier and more pungent. The stronger characteristics were enhanced whereas milder flavours lost power, a trend that was more marked in the winter cheeses. On average, the cheeses made from the more extensive farms were more elastic and slightly less bitter and pungent. They were also characterised by their globally less intense odour and aroma characteristics. The differences between the two production systems were noticeable in cheeses made in the winter or spring and the most significant after 13 weeks of ripening. For other periods or other ripening time, the cheeses made from the 2 groups of farms were very close.
S. Meier - One of the best experts on this subject based on the ideXlab platform.
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Effects of far-off and close-up transition Cow Feeding on uterine health, postpartum anestrous interval, and reproductive outcomes in pasture-based dairy Cows
Journal of Animal Science and Biotechnology, 2020Co-Authors: S. Meier, B. Kuhn-sherlock, A. Heiser, M. D. Mitchell, M. A. Crookenden, M. Vailati Riboni, J. J. Loor, J. R. RocheAbstract:Background In seasonal, pasture-based, dairy production systems, Cows must recover from calving and become pregnant within two to 3 months. To achieve this, the uterus must involute and ovulation must occur and continue at regular intervals. As these processes are affected by the Cows’ nutritional or metabolic status post-calving, the objective of this study was to evaluate the effect of Cow Feeding strategies on uterine health, the length of postpartum anestrous interval, and reproductive outcomes. The treatments consisted of two Feeding strategies during late-lactation and early dry period (far-off period; starting 4-month pre-calving) and three close-up dry period Feeding regimes (1-month pre-calving) in a 2 × 3 factorial arrangement. We randomly assigned 150 Cows to one of two far-off treatments. During late lactation, the herds ( n = 75 Cows per herd) were either control-fed (Controlfed) or over-fed (Overfed) to achieve a low or high body condition score (4-month pre-calving; BCS; ~ 4.25 and ~ 4.75; 10-point scale) at cessation of lactation. Within each of these treatments, three Feeding levels were applied during the close-up period (1-month pre-calving): ~ 65% (Feed65), ~ 90% (Feed90), or ~ 120% (Feed120) of metabolizable energy (ME) intakes relative to pre-calving requirements. Results Uterine health improved (i.e. polymorphonucleated (PMN) cells declined) with increased Feeding during the close-up period for Cows in the Overfed group. The reverse was evident for the Controlfed group with the greatest PMN at the highest intakes during the close-up period. The postpartum anoestrous interval (PPAI) was shorter in Cows from the Overfed group when moderately fed (Feed90) during the close-up period; in comparison, the PPAI was shorter in the Controlfed group, when those Cows were overfed in the close-up period (Feed120). The Cows in the Overfed treatment had greater conception and pregnancy rates if Cows had moderate dry matter intakes (Feed90) during the close-up period; these reproductive variables were less under excessive feed intakes (Feed120); yet, close-up dry matter intake had little effect on conception and pregnancy rates for the Controlfed group. Conclusions The far-off Feeding strategies increased early reproductive outcomes at 3 weeks of mating. Additionally, the interaction between far-off and close-up Feeding strategies resulted in high six-week pregnancy rate with a slight restriction during the close-up period but only in the far-off Overfed group. Thus, our hypothesis is supported under these conditions.
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Effects of far-off and close-up transition Cow Feeding on uterine health, postpartum anestrous interval, and reproductive outcomes in pasture-based dairy Cows.
Journal of animal science and biotechnology, 2020Co-Authors: S. Meier, B. Kuhn-sherlock, A. Heiser, M. D. Mitchell, M. A. Crookenden, M. Vailati Riboni, J. J. Loor, Jane K. Kay, J. R. RocheAbstract:In seasonal, pasture-based, dairy production systems, Cows must recover from calving and become pregnant within two to 3 months. To achieve this, the uterus must involute and ovulation must occur and continue at regular intervals. As these processes are affected by the Cows’ nutritional or metabolic status post-calving, the objective of this study was to evaluate the effect of Cow Feeding strategies on uterine health, the length of postpartum anestrous interval, and reproductive outcomes. The treatments consisted of two Feeding strategies during late-lactation and early dry period (far-off period; starting 4-month pre-calving) and three close-up dry period Feeding regimes (1-month pre-calving) in a 2 × 3 factorial arrangement. We randomly assigned 150 Cows to one of two far-off treatments. During late lactation, the herds (n = 75 Cows per herd) were either control-fed (Controlfed) or over-fed (Overfed) to achieve a low or high body condition score (4-month pre-calving; BCS; ~ 4.25 and ~ 4.75; 10-point scale) at cessation of lactation. Within each of these treatments, three Feeding levels were applied during the close-up period (1-month pre-calving): ~ 65% (Feed65), ~ 90% (Feed90), or ~ 120% (Feed120) of metabolizable energy (ME) intakes relative to pre-calving requirements. Uterine health improved (i.e. polymorphonucleated (PMN) cells declined) with increased Feeding during the close-up period for Cows in the Overfed group. The reverse was evident for the Controlfed group with the greatest PMN at the highest intakes during the close-up period. The postpartum anoestrous interval (PPAI) was shorter in Cows from the Overfed group when moderately fed (Feed90) during the close-up period; in comparison, the PPAI was shorter in the Controlfed group, when those Cows were overfed in the close-up period (Feed120). The Cows in the Overfed treatment had greater conception and pregnancy rates if Cows had moderate dry matter intakes (Feed90) during the close-up period; these reproductive variables were less under excessive feed intakes (Feed120); yet, close-up dry matter intake had little effect on conception and pregnancy rates for the Controlfed group. The far-off Feeding strategies increased early reproductive outcomes at 3 weeks of mating. Additionally, the interaction between far-off and close-up Feeding strategies resulted in high six-week pregnancy rate with a slight restriction during the close-up period but only in the far-off Overfed group. Thus, our hypothesis is supported under these conditions.
I R Johnson - One of the best experts on this subject based on the ideXlab platform.
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pasture and forage crop systems for non irrigated dairy farms in southern australia 1 physical production and economic performance
Agricultural Systems, 2008Co-Authors: D F Chapman, S N Kenny, D Beca, I R JohnsonAbstract:The dairy industry in southern Australia relies on perennial ryegrass pasture to supply 60-70% of the diet of lactating Cows. Improvements in the amount and quality of home-grown forage used for dairy Cow Feeding are critical for further productivity gains in the industry. A modeling approach was used to estimate the effects of changing the forage system on farm business profit. Base models (using 100% of farm area in perennial ryegrass pasture) were constructed for above-average (Top 40%) and high performing (Top 10%) farm types typical of two locations: Terang in southwest Victoria and Ellinbank in Gippsland, eastern Victoria. These models were then re-simulated using different forage base options such as: oversowing annual ryegrass, winter crops (annual ryegrass monoculture, winter cereal grown for whole crop silage), summer crops (grazing brassicas, maize), combinations of these (double cropping), or summer shoulder pasture (notionally based on tall fescue) on between 10% and 100% of farm area. Estimated total home-grown forage consumption ranged between 6.7 and 10.2 t DM/ha/year for Terang and 7.8 and 11.9 t DM/ha/year for Ellinbank. Within farm types at Terang, the amount of home-grown forage consumed explained between 30% and 45% of the variation in operating profit. The models predicted that profit improvements of $70-$100 per hectare per additional tonne of home-grown forage consumed are possible from changing the forage base. Oversowing annual ryegrass led to greater forage supply, but only at times when pasture availability was largely adequate to meet current herd requirements therefore additional feed was not used as cost-effectively as other options. By contrast, the summer shoulder pasture type shifted the seasonal distribution of forage supply further into summer compared to perennial ryegrass, and led to higher amounts of pasture in the diet and greater profitability. Double cropping systems also appeared capable of increasing operating profit and total home-grown forage consumption. Increasing home-grown forage consumption and profit by using some of the alternative pastures and forage crops investigated here requires better information on crop/pasture agronomy, management and Feeding, and greater decision-making and management input compared to current systems.
B Martin - One of the best experts on this subject based on the ideXlab platform.
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using visible or near infrared spectroscopy nirs on cheese to authenticate Cow Feeding regimes
Food Chemistry, 2013Co-Authors: D Andueza, Claire Agabriel, I. Constant, A Lucas, B MartinAbstract:Abstract An experiment was conducted to evaluate the ability of two spectroscopy methods to distinguish between pasture and preserved-forage cheeses. The reflectance spectra of 308 fresh and freeze-dried samples of Cow’s milk cheeses were recorded at wavelengths in the range of the visible, using a portable MINOLTA CM-2002 spectrophotometer. The reflectance spectra of the same samples were also measured in near infrared range using a non-portable laboratory monochromator NIRSystem 6500. The proportion of cheeses correctly classified by NIRS and visible spectra was respectively 0.96 and 0.91 for pasture samples, and 0.96 and 0.79 for preserved-forage samples. No significant differences were found when fresh and freeze-dried cheeses were compared. We conclude that NIRS is able to classify cheese samples from different regimes (here, pasture vs. preserved-forage).
