Kalcium- och fosforsmältbarhet hos växande hästar
In the latest edition of NRC (2007) the feeding recommendations for Ca and P to growing horses were increased with 35 and 25 %, respectively, based on results from a Canadian study showing that daily endogenous fecal losses of Ca and P were greater than previously suggested. A Ca absorption effic...
| Autor principal: | |
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| Formato: | L3 |
| Lenguaje: | sueco Inglés |
| Publicado: |
SLU/Dept. of Animal Nutrition and Management (until 231231)
2013
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| Materias: |
| _version_ | 1855570803716784128 |
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| author | Löf, Frida |
| author_browse | Löf, Frida |
| author_facet | Löf, Frida |
| author_sort | Löf, Frida |
| collection | Epsilon Archive for Student Projects |
| description | In the latest edition of NRC (2007) the feeding recommendations for Ca and P to growing
horses were increased with 35 and 25 %, respectively, based on results from a Canadian study
showing that daily endogenous fecal losses of Ca and P were greater than previously
suggested. A Ca absorption efficiency of 50 % is used for all horses. However, the true
absorption efficiency might be as high as 70 % in young horses. P absorption efficiency is
assumed to be higher for growing horses because their diets are often supplemented with
inorganic P. Thus, an efficiency of 45 % is used for growing horses as compared to 35 % for
mature horses. The aim of this study was to measure the digestibility of Ca and P in some
Swedish feedstuff in growing horses. An additional aim was to analyze the proportion of
soluble P in horse feces.
Four yearling Standardbred horses from Västerbo Stuteri were used in a cross-over design
with two different diets. One diet consisted of roughage alone and one of roughage and oats.
The trial started with a ten day adaptation period. Thereafter a collection period of six days
followed when feces were collected 10 hours per day and total feed intake was registered.
Feed and feces samples were analyzed for Ca and P to calculate digestibility and soluble P.
The average apparent Ca and P digestibility did not differ between diets and were 63 ± 4 %
and 23 ± 7 %, respectively, on the roughage-only diet and 49 ± 4 % and 21 ± 7 %,
respectively, on the roughage and oats diet. Using regression analyses, daily endogenous fecal
Ca and P were predicted to be 23 and 9 mg/kg body weight, respectively. The results from this
study cannot confirm that the increase in Ca- and P-recommendations to growing horses
(NRC, 2007) is justified but agrees with the results on which the previous NRC
recommendations were based. The study also indicates that most of the P (92-93 %) in horse
feces is soluble which mean that it should be gently handled to avoid environmental damage.
It also implies that horse feces are a good P fertilizer. |
| format | L3 |
| id | RepoSLU5195 |
| institution | Swedish University of Agricultural Sciences |
| language | swe Inglés |
| publishDate | 2013 |
| publishDateSort | 2013 |
| publisher | SLU/Dept. of Animal Nutrition and Management (until 231231) |
| publisherStr | SLU/Dept. of Animal Nutrition and Management (until 231231) |
| record_format | eprints |
| spelling | RepoSLU51952013-01-18T12:06:54Z Kalcium- och fosforsmältbarhet hos växande hästar Digestibility of calcium and phosphorus in growing horses Löf, Frida Kalcium Fosfor Smältbarhet Växande hästar Föl In the latest edition of NRC (2007) the feeding recommendations for Ca and P to growing horses were increased with 35 and 25 %, respectively, based on results from a Canadian study showing that daily endogenous fecal losses of Ca and P were greater than previously suggested. A Ca absorption efficiency of 50 % is used for all horses. However, the true absorption efficiency might be as high as 70 % in young horses. P absorption efficiency is assumed to be higher for growing horses because their diets are often supplemented with inorganic P. Thus, an efficiency of 45 % is used for growing horses as compared to 35 % for mature horses. The aim of this study was to measure the digestibility of Ca and P in some Swedish feedstuff in growing horses. An additional aim was to analyze the proportion of soluble P in horse feces. Four yearling Standardbred horses from Västerbo Stuteri were used in a cross-over design with two different diets. One diet consisted of roughage alone and one of roughage and oats. The trial started with a ten day adaptation period. Thereafter a collection period of six days followed when feces were collected 10 hours per day and total feed intake was registered. Feed and feces samples were analyzed for Ca and P to calculate digestibility and soluble P. The average apparent Ca and P digestibility did not differ between diets and were 63 ± 4 % and 23 ± 7 %, respectively, on the roughage-only diet and 49 ± 4 % and 21 ± 7 %, respectively, on the roughage and oats diet. Using regression analyses, daily endogenous fecal Ca and P were predicted to be 23 and 9 mg/kg body weight, respectively. The results from this study cannot confirm that the increase in Ca- and P-recommendations to growing horses (NRC, 2007) is justified but agrees with the results on which the previous NRC recommendations were based. The study also indicates that most of the P (92-93 %) in horse feces is soluble which mean that it should be gently handled to avoid environmental damage. It also implies that horse feces are a good P fertilizer. SLU/Dept. of Animal Nutrition and Management (until 231231) 2013 L3 swe eng https://stud.epsilon.slu.se/5195/ |
| spellingShingle | Kalcium Fosfor Smältbarhet Växande hästar Föl Löf, Frida Kalcium- och fosforsmältbarhet hos växande hästar |
| title | Kalcium- och fosforsmältbarhet hos växande hästar |
| title_full | Kalcium- och fosforsmältbarhet hos växande hästar |
| title_fullStr | Kalcium- och fosforsmältbarhet hos växande hästar |
| title_full_unstemmed | Kalcium- och fosforsmältbarhet hos växande hästar |
| title_short | Kalcium- och fosforsmältbarhet hos växande hästar |
| title_sort | kalcium- och fosforsmältbarhet hos växande hästar |
| topic | Kalcium Fosfor Smältbarhet Växande hästar Föl |