Figure 2 – Daily feed intake (left) and water intake (right) per animal averaged over the feeding variants with corresponding standard deviations.


Mean of 5 houses +/- standard deviation


250 200 150 100 50 0


0 10 20 30 Age (days) Liquid MHA-FA, n=5 DL Methionine, n=5 40 50


500 400 300 200 100 0


0 20 Age (days) 40 60 Broiler water intake +/- standard deviation


performance (Table 1 and Figure 1). The figures shown in Table 2 do not indicate any differences for feed intake, feed conversion or mortality (p > 0.05). Mortality showed a relatively high variation coefficient for both variants but overall losses varied between 1.9-4.1% percent in the ten houses. With respect to feed and water consumption, daily monitoring showed no significant differences between the feed variants, validating the application recommendation of a 65% biological efficacy of the MHA-FA over the DL-Met (Figure 2). Slaughterhouse feedback confirmed excellent footpad health (Figure 3). These data not only reflect good health and high animal welfare, but also indicate high utilization of feed protein or relatively low nitrogen excretion. High nitrogen excretion is always coupled with increased water excretion via urine which very often manifests itself in poorer bedding quality and a related deterioration in footpad health. Broilers with both treatments utilized 62% of the dietary protein (nitrogen) for deposition as body protein. In summary, the replacement of MHA-FA through DL-Met in a ratio of 100:65 did not show any performance differences in broilers under large-scale commercial conditions. According to analyses, an average MHA-FA supplementation of 2.95 kg/t was achieved. Following the tested recommenda- tion, this can be replaced by1.92 kg/t of DL-Met without af- fecting broiler productivity. The commercial price ratio of Met sources is often 80% or more. Corresponding to a DL-Met price of € 2.50 per kg, the MHA-FA price should be viewed as € 2.00 per kg. Calculating the cost of the average supplemen- tation from this, MHA-FA costs € 5.90 per tonne feed (2.95 kg/t * € 2.00 per kg) and DL-Met costs € 4.80/t (1.92 kg/t * € 2.50 per kg) and thus gives a saving of € 1.10/t feed when using DL-Met. This saving corresponds to a reduction of almost 19% in supplementation costs.


References available on request. 40


Table 2 – Average final weight feed consump- tion, feed conversion ratio, and mortality.1


Body weight (kg/animal)


Total


Control with MHA-FA Mean value CV a


Experiment with DL-Met Mean value CV a


p-value b


2.434 4.1%


2.421 4.1%


0.76 Feed Feed per gain (kg/kg)


consumption (kg/animal) Total


3.631 4.8%


3.598 2.5%


0.62 Total


1.503 0.8%


1.498 1.9%


0.77


a CV: coefficient of variation b p-value: probability of error according to Student’s T-test 1 According to slaughterhouse reports


Total 2.44 25.8% 2.82 26.8% 0.47 Mortality (%)


Figure 3 – Proportion of broilers scoring 0 (no lesions) on footpad bonitization at three cropping dates and averaged. Footpad scoring, % Score 0 of total delivered


100 90 80 70 60 50 40 30 20 10 0


84,5 84,1


95,2 96,0


98,9 98,5


94,9 94,6


MHA-FA


MetAMINO @ 65% BE


▶ POULTRY WORLD | No. 7, 2022


Feed consumption (g/Broiler)


Water intake (ml/Broiler)


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