Coarse limestone does not alleviate the negative effect of a low Ca/P ratio diet on characteristics of tibia strength and growth performance in broilers
The hypothesis was tested that an increased digestion of coarse compared with fine limestone can alleviate the negative effects of a low dietary Ca/P ratio on the growth performance and characteristics of tibia strength (CTS) in broilers. A total of 1,152 Ross 308 broiler chickens received a standar...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-10-01
|
| Series: | Poultry Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0032579120304004 |
| _version_ | 1819012293888835584 |
|---|---|
| author | Y.X. Hu P. Bikker M. Duijster W.H. Hendriks J. van Baal M.M. van Krimpen |
| author_facet | Y.X. Hu P. Bikker M. Duijster W.H. Hendriks J. van Baal M.M. van Krimpen |
| author_sort | Y.X. Hu |
| collection | DOAJ |
| description | The hypothesis was tested that an increased digestion of coarse compared with fine limestone can alleviate the negative effects of a low dietary Ca/P ratio on the growth performance and characteristics of tibia strength (CTS) in broilers. A total of 1,152 Ross 308 broiler chickens received a standard commercial starter feed from day 0 to 13. From day 14 onward, birds received 1 of 12 diets containing 1 of 6 Ca/P ratios (0.50, 0.75, 1.00, 1.25, 1.50, and 1.75) and 1 of 2 limestone particle sizes (<500 [fine] and 500 to 2,000 [coarse] μm) in a study with a 6 × 2 factorial arrangement of treatments. Total P content was fixed at 5.5 g/kg for all treatment diets. Each treatment was replicated 6 times with 16 birds per replicate pen. On day 20 and 21, twelve birds per pen were randomly selected from 4 of the 6 replicate pens for tibia analysis and digesta collection from different gut segments. The apparent Ca digestibility was higher for fine than coarse limestone in the jejunum (P = 0.043). However, this difference in Ca digestibility disappeared for the low, whereas it remained for the high Ca/P ratios in the proximal (Pinteraction = 0.067) and distal (Pinteraction = 0.052) ileum. In addition, coarse limestone improved apparent P digestibility in the proximal and distal ileum (P < 0.001) but not in the jejunum (P = 0.305). Regardless of limestone particle size, reducing dietary Ca/P ratio linearly improved apparent Ca and P digestibility in the proximal and distal ileum (P < 0.001). Moreover, decreasing dietary Ca/P ratio linearly (P < 0.001) and quadratically (P < 0.046) reduced the CTS. Reducing dietary Ca/P ratio linearly (P < 0.003) and quadratically (P ≤ 0.006) decreased body weight gain and increased feed conversion ratio. For both fine and coarse limestone, the optimal Ca/P ratio was 1.00 to 1.25 to optimize apparent Ca and P digestibility while maintaining growth performance and CTS. Reducing Ca/P ratio from 1.75 to 1.00 improved distal ileal Ca and P apparent digestibility from 36.6 to 53.7% and 48.0 to 58.3%, respectively. In conclusion, coarse limestone is equally digestible with fine limestone at a low Ca/P ratio but is less digestible at a high Ca/P ratio, and the optimal Ca/P ratio in the diet is 1.00 to 1.25 for both fine and coarse limestone. |
| first_indexed | 2024-12-21T01:41:45Z |
| format | Article |
| id | doaj.art-f3ea7539cfc94192b72e51367ef4b556 |
| institution | Directory Open Access Journal |
| issn | 0032-5791 |
| language | English |
| last_indexed | 2024-12-21T01:41:45Z |
| publishDate | 2020-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Poultry Science |
| spelling | doaj.art-f3ea7539cfc94192b72e51367ef4b5562022-12-21T19:20:09ZengElsevierPoultry Science0032-57912020-10-01991049784989Coarse limestone does not alleviate the negative effect of a low Ca/P ratio diet on characteristics of tibia strength and growth performance in broilersY.X. Hu0P. Bikker1M. Duijster2W.H. Hendriks3J. van Baal4M.M. van Krimpen5Wageningen University & Research, Wageningen Livestock Research, 6700 AH Wageningen, The Netherlands; Wageningen University & Research, Animal Nutrition Group, 6700 AH Wageningen, The NetherlandsWageningen University & Research, Wageningen Livestock Research, 6700 AH Wageningen, The Netherlands; Corresponding author:R&D Department, De Heus Animal Nutrition B.V., 6710, BJ Ede, The NetherlandsWageningen University & Research, Animal Nutrition Group, 6700 AH Wageningen, The NetherlandsWageningen University & Research, Animal Nutrition Group, 6700 AH Wageningen, The NetherlandsWageningen University & Research, Wageningen Livestock Research, 6700 AH Wageningen, The NetherlandsThe hypothesis was tested that an increased digestion of coarse compared with fine limestone can alleviate the negative effects of a low dietary Ca/P ratio on the growth performance and characteristics of tibia strength (CTS) in broilers. A total of 1,152 Ross 308 broiler chickens received a standard commercial starter feed from day 0 to 13. From day 14 onward, birds received 1 of 12 diets containing 1 of 6 Ca/P ratios (0.50, 0.75, 1.00, 1.25, 1.50, and 1.75) and 1 of 2 limestone particle sizes (<500 [fine] and 500 to 2,000 [coarse] μm) in a study with a 6 × 2 factorial arrangement of treatments. Total P content was fixed at 5.5 g/kg for all treatment diets. Each treatment was replicated 6 times with 16 birds per replicate pen. On day 20 and 21, twelve birds per pen were randomly selected from 4 of the 6 replicate pens for tibia analysis and digesta collection from different gut segments. The apparent Ca digestibility was higher for fine than coarse limestone in the jejunum (P = 0.043). However, this difference in Ca digestibility disappeared for the low, whereas it remained for the high Ca/P ratios in the proximal (Pinteraction = 0.067) and distal (Pinteraction = 0.052) ileum. In addition, coarse limestone improved apparent P digestibility in the proximal and distal ileum (P < 0.001) but not in the jejunum (P = 0.305). Regardless of limestone particle size, reducing dietary Ca/P ratio linearly improved apparent Ca and P digestibility in the proximal and distal ileum (P < 0.001). Moreover, decreasing dietary Ca/P ratio linearly (P < 0.001) and quadratically (P < 0.046) reduced the CTS. Reducing dietary Ca/P ratio linearly (P < 0.003) and quadratically (P ≤ 0.006) decreased body weight gain and increased feed conversion ratio. For both fine and coarse limestone, the optimal Ca/P ratio was 1.00 to 1.25 to optimize apparent Ca and P digestibility while maintaining growth performance and CTS. Reducing Ca/P ratio from 1.75 to 1.00 improved distal ileal Ca and P apparent digestibility from 36.6 to 53.7% and 48.0 to 58.3%, respectively. In conclusion, coarse limestone is equally digestible with fine limestone at a low Ca/P ratio but is less digestible at a high Ca/P ratio, and the optimal Ca/P ratio in the diet is 1.00 to 1.25 for both fine and coarse limestone.http://www.sciencedirect.com/science/article/pii/S0032579120304004particle size of limestoneCa/P ratiophosphorus and calcium digestibilitybroilers |
| spellingShingle | Y.X. Hu P. Bikker M. Duijster W.H. Hendriks J. van Baal M.M. van Krimpen Coarse limestone does not alleviate the negative effect of a low Ca/P ratio diet on characteristics of tibia strength and growth performance in broilers Poultry Science particle size of limestone Ca/P ratio phosphorus and calcium digestibility broilers |
| title | Coarse limestone does not alleviate the negative effect of a low Ca/P ratio diet on characteristics of tibia strength and growth performance in broilers |
| title_full | Coarse limestone does not alleviate the negative effect of a low Ca/P ratio diet on characteristics of tibia strength and growth performance in broilers |
| title_fullStr | Coarse limestone does not alleviate the negative effect of a low Ca/P ratio diet on characteristics of tibia strength and growth performance in broilers |
| title_full_unstemmed | Coarse limestone does not alleviate the negative effect of a low Ca/P ratio diet on characteristics of tibia strength and growth performance in broilers |
| title_short | Coarse limestone does not alleviate the negative effect of a low Ca/P ratio diet on characteristics of tibia strength and growth performance in broilers |
| title_sort | coarse limestone does not alleviate the negative effect of a low ca p ratio diet on characteristics of tibia strength and growth performance in broilers |
| topic | particle size of limestone Ca/P ratio phosphorus and calcium digestibility broilers |
| url | http://www.sciencedirect.com/science/article/pii/S0032579120304004 |
| work_keys_str_mv | AT yxhu coarselimestonedoesnotalleviatethenegativeeffectofalowcapratiodietoncharacteristicsoftibiastrengthandgrowthperformanceinbroilers AT pbikker coarselimestonedoesnotalleviatethenegativeeffectofalowcapratiodietoncharacteristicsoftibiastrengthandgrowthperformanceinbroilers AT mduijster coarselimestonedoesnotalleviatethenegativeeffectofalowcapratiodietoncharacteristicsoftibiastrengthandgrowthperformanceinbroilers AT whhendriks coarselimestonedoesnotalleviatethenegativeeffectofalowcapratiodietoncharacteristicsoftibiastrengthandgrowthperformanceinbroilers AT jvanbaal coarselimestonedoesnotalleviatethenegativeeffectofalowcapratiodietoncharacteristicsoftibiastrengthandgrowthperformanceinbroilers AT mmvankrimpen coarselimestonedoesnotalleviatethenegativeeffectofalowcapratiodietoncharacteristicsoftibiastrengthandgrowthperformanceinbroilers |