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Effect of precision feeding according to energy balance on performance of early lactation dairy cows
Year:
2013
Authors :
מלץ, אפרים
;
.
Volume :
Co-Authors:
Maltz, E., Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel, Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Barbosa, L.F., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Bueno, P., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Scagion, L., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Kaniyamattam, K., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Greco, L.F., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
De Vries, A., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Santos, J.E.P., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Facilitators :
From page:
685
To page:
697
(
Total pages:
13
)
Abstract:
The objectives of this study were to evaluate individual precision feeding (IPF) and nutrient utilization according to individual energy balance at early lactation compared to the control which was the traditional total mixed ration (TMR ) feeding strategy. Fifty-eight Holsteins cows, blocked by parity and production during the pre-treatment period and then randomly assigned at 21 d postpartum to a control TMR diet [n = 29; 16.2% crude protein (CP), 1.64 Mcal of net energy for lactation (NEL), 22% starch, and 19% forage neutral detergent fiber (NDF)] or a diet with caloric density manipulated weekly (precision diet, n = 29, 16.2% CP, 1.59 to 1.68 NEL, 18 to 26% starch, and 16 to 22% forage NDF) to promote a calculated positive energy balance of 5 Mcal/day. Diets were fed as total mixed rations and precision cows had their diets adjusted individually once a week, by grain supplementation from 0 to 25% of daily DM offered, according to energy balance of the preceding week. Daily energy balance was calculated out of measured DM intake and data provided by commercial sensors (milk meters, on-line milk composition analyzers and walk through scales for body weight measurement), The study lasted from wk 3 to 19 postpartum. Compared with controls, precision cows had similar DM intake (24.3 kg/d), but NEL intake tended to be greater primarily between wk 4 and 8 postpartum. Yields of milk (45.2 vs. 41.9 kg/d), milk components, 3.5% fat-corrected milk (44.0 vs. 40.8 kg/d), and energy-corrected milk (43.4 vs. 40.2) were all greater for precision than control cows, resulting in greater energy-corrected milk production per kg of diet DM consumed (1.79 vs. 1.72). Precision cows produced more milk calories per kg of metabolic weight (0.227 vs. 0.213 Mcal of NEL/kg), although the amount of consumed calories partitioned into milk (82.3%) and measures of energy status did not differ between treatments throughout the study.
Note:
Related Files :
Commercial sensors
Milk production
Nutrients
nutrition
Positive energies
Precision feeding
Weighing
עוד תגיות
תוכן קשור
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DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
22758
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:54
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Scientific Publication
Effect of precision feeding according to energy balance on performance of early lactation dairy cows
Maltz, E., Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel, Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Barbosa, L.F., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Bueno, P., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Scagion, L., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Kaniyamattam, K., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Greco, L.F., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
De Vries, A., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Santos, J.E.P., Department of Animal Sciences, University of Florida, Gainesville 32611, United States
Effect of precision feeding according to energy balance on performance of early lactation dairy cows
The objectives of this study were to evaluate individual precision feeding (IPF) and nutrient utilization according to individual energy balance at early lactation compared to the control which was the traditional total mixed ration (TMR ) feeding strategy. Fifty-eight Holsteins cows, blocked by parity and production during the pre-treatment period and then randomly assigned at 21 d postpartum to a control TMR diet [n = 29; 16.2% crude protein (CP), 1.64 Mcal of net energy for lactation (NEL), 22% starch, and 19% forage neutral detergent fiber (NDF)] or a diet with caloric density manipulated weekly (precision diet, n = 29, 16.2% CP, 1.59 to 1.68 NEL, 18 to 26% starch, and 16 to 22% forage NDF) to promote a calculated positive energy balance of 5 Mcal/day. Diets were fed as total mixed rations and precision cows had their diets adjusted individually once a week, by grain supplementation from 0 to 25% of daily DM offered, according to energy balance of the preceding week. Daily energy balance was calculated out of measured DM intake and data provided by commercial sensors (milk meters, on-line milk composition analyzers and walk through scales for body weight measurement), The study lasted from wk 3 to 19 postpartum. Compared with controls, precision cows had similar DM intake (24.3 kg/d), but NEL intake tended to be greater primarily between wk 4 and 8 postpartum. Yields of milk (45.2 vs. 41.9 kg/d), milk components, 3.5% fat-corrected milk (44.0 vs. 40.8 kg/d), and energy-corrected milk (43.4 vs. 40.2) were all greater for precision than control cows, resulting in greater energy-corrected milk production per kg of diet DM consumed (1.79 vs. 1.72). Precision cows produced more milk calories per kg of metabolic weight (0.227 vs. 0.213 Mcal of NEL/kg), although the amount of consumed calories partitioned into milk (82.3%) and measures of energy status did not differ between treatments throughout the study.
Scientific Publication
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