Nutrient digestibility of processed animal proteins in broilers

Abstract

Krimpen, van M.M., P. Bikker and J. van Harn, 2018. Nutrient digestibility of processed animal proteins in broilers; . Wageningen Livestock Research, Report 1185. Summary UKProcessed Animal Proteins (PAPs) have long been banned from farm animal diets in the EU. In this period, raw material selection and processes to prepare PAPs have been improved and diversified allowing for a range of products available for inclusion in animal diets. As a consequence, the products and their respective specifications in present feedstuff tables do not cover the composition and quality of presently available PAPs. This report presents the methods and results of a study, conducted by Wageningen Livestock Research at the request of European Fat Processors and Renderers Association (EFPRA), in which the total tract digestibility of proximate components and ileal phosphorus, calcium and amino acid digestibility of 2 PAPs of pig origin in broiler chickens were evaluated. The results from this study showed that the chemical composition of the new PAPs are broadly similar to the 'former'PAPs, but that the AME and the digestibility of crude fat, crude protein and amino acids of the new

Effects of Lower Dietary Calcium and Phosphorus Than Recommended on Growth Performance and Bone Mineralization of Broilers

“…However, our result contradicts the assumption, which indicates the higher requirement of Ca and NPP is more necessary to improve bone mineralization than performance. It is expected that the ratio between the skeleton and soft tissues has been changed in modern broilers compared to broiler strains of one or two decades ago, which consequently affects the N, Ca, and P content in broiler carcasses (van Krimpen et al, 2013). Onyango et al (2003) found that bone-mineral content, bone mineral density, and percentage of ash increased linearly as the level of dietary Ca risen from 0.45 to 0.91%, which may be related to the much lower level of Ca than the applied level of the present study.…”

“…Despite plenty of research have been performed on Ca and P during the last decades, and their requirements in broiler chicks are considered settled, and a done deal, more recent studies (Li et al, 2017;Valable et al, 2018;Kiani and Tahiri 2020;Ceylan et al, 2020) has dramatically changed the perception of the actual Ca and P needs, which can be attributed to the change in growth potential and body composition (percentage of breast meat) of broilers. The ratio between soft tissues and bones (more soft tissues -fewer bones) might also be changed, which consequently may affect the Ca and P requirement of modern fast-growing broilers (van Krimpen et al, 2013). Slight reduction in Ca and NPP requirements of Ross-308 broilers by the breeding company, approximately 6.3 % and 4.4 %, respectively in 2014 compared to 2009, may be attributed to the mentioned changes; even the latest edition of nutrient specifications in 2019 has no difference.…”

Effects of Lower Dietary Calcium and Phosphorus on Growth Performance and Bone Mineralizatıon of Broilers

“…However, our result contradicts the assumption which indicates higher requirement of Ca and NPP is more necessary to improve bone mineralization than performance. It is expected that the ratio between the skeleton and soft tissues has been changed in contemporary broilers compared to broiler strains of one or two decades ago, which consequently affects the N, Ca and P content in broiler carcasses (van Krimpen et al, 2013). Onyango et al (2003) found that bone-mineral content, bone mineral density, and percentage of ash increased linearly as the level of dietary Ca increased from 0.45 to 0.91%, which may be related to the much lower level of Ca than the applied level of the present study.…”

“…Despite plenty of research have been performed on Ca and P during the last decades, and their requirements in broiler chicks are considered settled, and a done deal, more recent studies (Li et al, 2017;Valable et al, 2018;Kiani and Tahiri, 2020;Ceylan et al, 2020) has dramatically changed the perception of the actual Ca and P needs, which can be attributed to the change in growth potential and body composition (percentage of breast meat) of broilers. The ratio between soft tissues and bones (more soft tissues -fewer bones) might also be changed, which consequently may affect the Ca and P requirement of modern fast-growing broilers (van Krimpen et al, 2013). Slight reduction in Ca and NPP requirements of Ross-308 broilers by the breeding company, approximately 6.3 % and 4.4 %, respectively in 2014 compared to 2009, may be attributed to the mentioned changes; even the latest edition of nutrient specifications in 2019 has no difference.…”

Micronutriënten in Nederland: landbouwkundige behoefte en balansverkenningen : rapportage in het kader van het TKI-project Micronutriënten in de kringloop (LWV20.249)

“…Andere symptomen bij suikerbieten zijn een geremde groei met bleekgroene samengeknepen bladeren bij molybdeengebrek, wolkvormige lichtgele vlekken op de oudste bladeren bij mangaangebrek en geelverkleuring tussen de nerven bij magnesiumgebrek (IRS, 2023). Bij dieren leidt gebrek aan micronutriënten tot groeivertraging, verminderde vruchtbaarheid en een verlaagde weerstand (Van Krimpen et al, 2013).…”