FOTO: OLEKSANDR PIDVALNYI
PHOTO: CJ CHEILJEDANG
The magnitude of crude protein reduction in poultry is much lower compared to pigs.
while at the same time N-excretion was lowered by 29%. Further CP reduction down to 12.7% resulted in a decrease in N-retention. However, performance was successfully maintained by supplementing L-Val, L-Ile, L-Leu, L-His, and L-Phe to a diet with 4% lower CP content. To conclude, the usage of crystalline AA allows to formulate very low CP diets in swine without impairing performance. Moreover, all the tools to further reduce the nitrogen excretion caused by animal production are in place.
CP reduction strategy in poultry Poultry nutritionists have different approaches towards ration formulation globally, which is related to the availability of the local raw materials, environmental conditions, local regula- tions, and production targets. However, the one-point on the agenda for everyone is to focus on reducing the feed cost without losing the animal’s performance.
A high-density diet is not always economical, therefore, it is required to pay attention to the utilisation of expensive resources and try to maintain the major nutrients while keeping the optimal performance. The major environmental burden of broiler production is eutrophication (ammonia emission water pollution) and soil acidification. Ammonia is emitted from manure by the breakdown of undigested protein and uric acid. Several studies have shown a reduction in N excretion by about 10% with a 1 percentage point decrease in the dietary CP contents in broilers. Dietary manipulation could directly affect the nutrient excretion. The crude protein reduction strategy will not only reduce the impact of animal production on the environment but also supports economical feed production.
Reducing N excretion in poultry The magnitude of CP reduction in poultry is much lower com- pared to pigs. A study conducted in 2019 tested the lowering of CP in grower (CP: 20.8-17.8%) and finisher (CP:19.8-16.8%) diets in broilers. Continuous reduction in CP while keeping the nutrient contents of the diet constant did not impact the BWG of the animal. However, there was a significant improve- ment in FCR in the diet with 17.6% CP as compared to control diet (CP:19.1%). The poultry industry has huge protentional towards sustain- able production. According to estimates from FEFAC total poultry feed production in 2019 in EU-28 was 55999 (000MT). If on an average 0.5% CP is reduced in total poultry feed production, it carries a potential of reducing estimated N excretion by 2799 (000MT).
References are available on request
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