Effects of PROXYMet™ replacing MHA‑FA in female broiler diets
In this study conducted at a customer’s trial facility in Oceania, PROXYMet™ matched MHA‑FA performance and even delivered a 22 grams numerical weight gain advantage in female Ross 308 broilers. At 650 grams DL‑methionine per kg product, PROXYMet™ stands as a reliable 1:1 MHA‑FA substitute ready for commercial-scale adoption.
The findings confirm that replacing 1 kilogram of MHA‑FA with 650 grams of DL methionine provided through PROXYMet™ supports comparable performance in all female broilers, consistent with results from a previous trial.
Senior Technical Service Manager, Evonik
Building on findings from a prior all‑male broiler study, this trial aimed to determine whether 650 grams of DL‑methionine supplied via PROXYMet™ could effectively replace 1 kilogram of MHA‑FA in all‑female broiler feeds without affecting performance outcomes.
Location: Oceania
Project team leaders: Amy Liu, Sheila Heidi M. Ramos, Pradeep Krishnan
| Animals | 320 Ross 308 female broilers |
| Design | Completely randomized design: 2 treatments with 8 replicates per treatment, 20 birds each |
| Housing | All experimental procedures were performed at an integrator’s dedicated trial facility, which is designed to support optimum broiler growth and performance under conditions representative of commercial production practices. |
| Diets | Corn, soybean meal and sunflower meal-based diet, supplemented with either: 1) MHA‑FA as the methionine source; or 2) PROXYMet™: The feeding period (day 0-34) included 3 feeding phases: |
| Feeding | Verification of the expected ProxyMet™ and MHA‑FA supplementation levels across all feeding phases provides evidence of accurate and consistent feed manufacturing in the analyzed trial samples. |
| Parameters | Average daily feed consumption, average daily gain (ADG), feed conversion ratio (FCR) and |
| Duration | 34 days |
Trial results
- Body weight gain (BWG), feed intake (FI), and feed conversion ratio (FCR) did not differ significantly among treatments at any feeding phase (Figures 1, 2, 3). However, birds receiving the PROXYMet™ treatment showed a numerical advantage of 22 grams in final body weight (Figure 1).
- 650 grams of DL‑methionine in PROXYMet™ is a suitable replacement for 1 kilogram of MHA‑FA in all‑female broiler diets.
- Replacement of MHA-FA with PROXYMET™ resulted in a feed cost reduction of 1.06 USD/t (Table 1).
