STRATEGY ▶▶▶
With the legisla- tion change it is now possible to feed insect pro- tein as well.
human consumption at the point of slaughter. To ensure safety, the sourcing, processing and transport of PAPs will take place under veterinary control. In the 20 years since the ban was first implemented, researchers have developed a PCR test that ensures PAPs do not contain by-products they should not contain. “Because we have a species-to-species ban in Europe, so they also test pigs and poultry,” says Van Vuure.
More research needed A lot has changed since PAPs were first banned 20 years ago. Processing techniques, for instance, have evolved and im- proved. Some research has been conducted on the nutrition- al benefits of porcine PAPs used in poultry feed. Van Vuure outlined some of the results in a recently-published white pa- per. Working closely with EFPRA, Wageningen Livestock Re- search conducted a study in 2010 to evaluate the nutritional content and digestibility of PAPs, as well as the overall perfor- mance of laying hens that consumed the feed. The 2010 study evaluated four types of PAPs in feed: 40%, 50%, 58% and 60% protein in the diet. Layer performance differed between treatments. The most fa- vourable of the four was PAP-50%, and the least favourable was PAP-40%. Differences in performance seemed to be
8 ▶ POULTRY WORLD | No. 7, 2021
partially related to differences in feed intake and correspond- ing amino acid intake. While supplementation with PAPs did not generally reduce feather pecking behaviour, in the PAP- 40% and PAP-50% diets hens showed a delay in the develop- ment of feather damage. At the same time, in comparison with the flocks receiving the higher PAPs diet, those under the PAP-40% and PAP-50% regimes showed improved litter condition, foraging, walking behaviour and floor pecks. A 2018 study assessed digestibility and overall performance when two types of porcine PAP were incorporated into the diet of broilers, replacing soybean meal. The researchers looked at intestinal health, litter quality, footpad lesions and bone quality. The results of the study showed that both types of PAP tested can be used as suitable replacements for soy- bean meal in broiler diets without impacting performance results, including litter quality, footpad lesions, gait, bone quality and intestinal health. The performance study was followed by a study of digestibili- ty. More complete results can be found on the EFPRA website. Realistically, however, two studies are not enough to draw definitive conclusions. “As a nutritionist and a scientist, I think we should do more research,” says Van Vuure. “To really make a claim, we have to do more.” It is expected that the ban will be lifted effective from October of this year.
PHOTO: HENK RISWICK
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