Effects of the source and level of digestible phosphorus in the diet on performance and egg quality of brown laying hens from 64 to 76 weeks of age

Hernández, Pedro and Fernández de Juan, Álvaro and Fondevila Lobera, Guillermo and B. Mabrouk, Jihed and García González, Julio Carlos and Scappaticcio, Rocco and Gonzalez Mateos, Gonzalo (2019). Effects of the source and level of digestible phosphorus in the diet on performance and egg quality of brown laying hens from 64 to 76 weeks of age. In: "Poultry Science Association 108th Annual Meeting", 15/07/2019-18/07/2019, Montreal, Canadá. p. 2.

Description

Title: Effects of the source and level of digestible phosphorus in the diet on performance and egg quality of brown laying hens from 64 to 76 weeks of age
Author/s:
  • Hernández, Pedro
  • Fernández de Juan, Álvaro
  • Fondevila Lobera, Guillermo
  • B. Mabrouk, Jihed
  • García González, Julio Carlos
  • Scappaticcio, Rocco
  • Gonzalez Mateos, Gonzalo
Item Type: Presentation at Congress or Conference (Other)
Event Title: Poultry Science Association 108th Annual Meeting
Event Dates: 15/07/2019-18/07/2019
Event Location: Montreal, Canadá
Title of Book: Poultry Science Association 108th Annual Meeting Abstracts
Date: July 2019
Subjects:
Freetext Keywords: digestible phosphorus; calcined bone phosphate; egg quality; laying hen; monocalcium phosphate
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

We studied the influence of the source and level of digestible phosphorus (dP) in the diet on performance and egg quality traits of brown hens from 64 to 76 wk of age. The diets were based on corn and soybean meal and all contained 4 .0% Ca. The design was completely randomized with 8 treatments arranged as a 2x4 factorial with 2 sources of P [monocalcium phosphate (MCP) and calcined bone phosphate (CBP)] and 4 levels of dP (0.27, 0.31, 0.35, and 0.39%) as main effects. Each treatment was replicated 14 times and the experimental unit was an enriched cage with 6 hens. The experiment lasted for 12 wk (3 periods of 4 wk each). Egg production and hen mortality were recorded daily. Feed intake (FI) and BW of the hens were determined by period and cumulatively . Egg weight was estimated by period by weighing all the eggs produced the last day of each week on trial . From these data, ADFI, egg mass, feed conversion ratio (FCR), and BW gain (BWG) were calculated by period Poult. Sci. 98(E-Suppl. 1)160and cumulatively. Egg quality traits, including Haugh Units and shell resistance to breakage, were determined per cage in 8 eggs collected at random the last 2 d of each experimental period. In addition, the percentage of dirty, broken, and shell-less eggs was recorded in all eggs produced. Data were analyzed as a completely randomized design with source of P and level of dP of the feed as main effects, and the interaction between them was also analyzed. In addition, the effect of the level of dP on the different variables studied was partitioned into linear (L) and quadratic (Q) components. No interactions between main effects were detected for any of the traits studied and therefore, only main effects are presented. Neither source of P nor level of dP affected any of the productive traits studied, except BWG that increased (L; P < 0.05) as the level of dP of the diet increased. An increase in dP of the diet from 0 .27 to 0.39% tended to reduce (L, P = 0 .077; Q, P = 0.058) shell resistance to breakage. Haugh units decreased linearly (P < 0.01) as the level of dP increased. The percentage of non-sealable eggs (dirty, broken, and shell-less eggs) was higher in hens fed CBP than in hens fed MCP (P< 0.05). In conclusion, from 64 to 76 wk of age, hens require no more than 0 .27% dP in the diet for optimal egg production and egg quality. An excess of dP (≥0.39%) might reduce shell quality. Hens responded similarly to both sources of P but the percentage of non-sealable eggs increased with the use of calcined bone phosphate.

More information

Item ID: 64496
DC Identifier: http://oa.upm.es/64496/
OAI Identifier: oai:oa.upm.es:64496
Official URL: https://poultryscience.org/2019-PSA-Annual-Meeting
Deposited by: Memoria Investigacion
Deposited on: 22 Oct 2020 07:19
Last Modified: 22 Oct 2020 07:43
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