Co-Authors:
Maltz, E., ARO, Volcani Center, Israel
Livshin, N., ARO, Volcani Center, Israel
Antler, A., ARO, Volcani Center, Israel
Brukental, I., ARO, Volcani Center, Israel
Arieli, A., Hebrew University, Jerusalem, Israel
Abstract:
The objective was to evaluate precision feeding of protein and energy to the individual cow duringthe transition time from calving to lactation establishment. Dual channel, computer-controlled self-feeders (CCSF) supplied daily concentrate allocations of protein and energy based on dry matter intake (DMI), as calculated with a model that used daily milk yield (MY), body weight (BW), days in milk (DIM), and milk composition as inputs. In the first stage of the trial two groups of cows received two different precision rations and the control group a total mixed ration (TMR). In the second stage, the better precision ration was fed to one group, and TMR to a control group. All performance parameters were measured until 7 weeks after calving in the first stage and up to 20 weeks after calving in the second. The MY, BW and body condition (BC) records favored precision feeding over TMR: MY exceeded 44 kg/d vs 41.3 kg/d; BW fell by less than 8% vs more than 10%, post-calving; and average BC score declined for 7 vs 11 weeks, and from 2.9 to 2.7 vs 3.1 to 2.4. In the second phase the same trend was demonstrated despite a lower performance of both groups. It is concluded that precision agriculture principles can be applied to protein and energy feeding management for dairy cows.
תפריט נגישות
ניגודיות עדינה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
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