Effect of plant maturity at harvest of haylage on digestibility and faecal particle size in horses fed forage-dominated diets
Time of harvest affects nutritional value and digestibility of haylage since plants are in different developmental stages. The aim of this study was to examine the effect of plant maturity of haylage cut in June, July and August on digestibility and faecal particle size in horses. Forage and faecal...
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| Formato: | H2 |
| Lenguaje: | Inglés sueco |
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SLU/Dept. of Animal Nutrition and Management (until 231231)
2010
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| Materias: |
| _version_ | 1855570378888314880 |
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| author | Wickström, Emelie |
| author_browse | Wickström, Emelie |
| author_facet | Wickström, Emelie |
| author_sort | Wickström, Emelie |
| collection | Epsilon Archive for Student Projects |
| description | Time of harvest affects nutritional value and digestibility of haylage since plants are in different developmental stages. The aim of this study was to examine the effect of plant maturity of haylage cut in June, July and August on digestibility and faecal particle size in horses.
Forage and faecal samples used for the analysis of apparent dry matter digestibility (DMd) and particle size distribution in faeces were from a feed-study performed in the autumn of 2009. Twelve horses were used in the study, divided into three groups in a change-over experiment. Each group was fed haylage harvested in June, July or August during three periods. Faecal grab samples were taken from each horse and pooled so that one sample represented one horse during one period. In total 36 faecal samples were analysed. Apparent DMd of the different haylage diets was calculated by using the amount of acid-insoluble ash in feed and faeces as an internal marker. The apparent DMd was different in the three haylage diets. June haylage had the highest apparent DMd and August the lowest. There was no difference in apparent DMd among the periods or horses. However, a difference among horses occurred when two horses with outlier values were excluded from the statistical evaluation.
Particle size distribution in faeces was measured using stainless steel sieves of different mesh sizes. Particle size distribution in faeces did not differ between horses or periods. Particle size distribution in faeces from horses fed the diet containing haylage harvested in June differed from horses fed July/August haylage in all fractions lesser than 2.0 mm. Faecal particles from diets containing haylage harvested in July and August dominated the middle fractions (0.1 – 2.0 mm). The diet containing June haylage had the largest proportion of faecal particles in the smallest fraction size (<0.1 mm). Fraction size 0.2 mm was the only fraction with a difference between all diets. August haylage dominated followed by July and June haylage. More than 0.7 of the faecal particles were found in the largest fraction size (>2.0 mm).
This study confirms that a more mature herbage produces a less digestible forage for horses. A haylage of high DMd gave a higher proportion of faecal particles less than 0.1 mm. A more lignified haylage with lower digestibility results in a higher proportion of faecal particles between 0.1 and 2.0 mm.
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| format | H2 |
| id | RepoSLU2030 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés swe |
| publishDate | 2010 |
| publishDateSort | 2010 |
| publisher | SLU/Dept. of Animal Nutrition and Management (until 231231) |
| publisherStr | SLU/Dept. of Animal Nutrition and Management (until 231231) |
| record_format | eprints |
| spelling | RepoSLU20302012-04-20T14:16:50Z Effect of plant maturity at harvest of haylage on digestibility and faecal particle size in horses fed forage-dominated diets Plantmognadens inverkan på smältbarhet och partikelstorlek i träck hos hästar utfodrade med hösilage-dominerade foderstater Wickström, Emelie plant maturity haylage digestibility faecal particle size in horses acid-insoluble ash Time of harvest affects nutritional value and digestibility of haylage since plants are in different developmental stages. The aim of this study was to examine the effect of plant maturity of haylage cut in June, July and August on digestibility and faecal particle size in horses. Forage and faecal samples used for the analysis of apparent dry matter digestibility (DMd) and particle size distribution in faeces were from a feed-study performed in the autumn of 2009. Twelve horses were used in the study, divided into three groups in a change-over experiment. Each group was fed haylage harvested in June, July or August during three periods. Faecal grab samples were taken from each horse and pooled so that one sample represented one horse during one period. In total 36 faecal samples were analysed. Apparent DMd of the different haylage diets was calculated by using the amount of acid-insoluble ash in feed and faeces as an internal marker. The apparent DMd was different in the three haylage diets. June haylage had the highest apparent DMd and August the lowest. There was no difference in apparent DMd among the periods or horses. However, a difference among horses occurred when two horses with outlier values were excluded from the statistical evaluation. Particle size distribution in faeces was measured using stainless steel sieves of different mesh sizes. Particle size distribution in faeces did not differ between horses or periods. Particle size distribution in faeces from horses fed the diet containing haylage harvested in June differed from horses fed July/August haylage in all fractions lesser than 2.0 mm. Faecal particles from diets containing haylage harvested in July and August dominated the middle fractions (0.1 – 2.0 mm). The diet containing June haylage had the largest proportion of faecal particles in the smallest fraction size (<0.1 mm). Fraction size 0.2 mm was the only fraction with a difference between all diets. August haylage dominated followed by July and June haylage. More than 0.7 of the faecal particles were found in the largest fraction size (>2.0 mm). This study confirms that a more mature herbage produces a less digestible forage for horses. A haylage of high DMd gave a higher proportion of faecal particles less than 0.1 mm. A more lignified haylage with lower digestibility results in a higher proportion of faecal particles between 0.1 and 2.0 mm. Tiden för vallskörd påverkar hösilagets näringsvärde och smältbarhet, då vallgrödorna befinner sig i olika botaniska utvecklingsstadium. Målsättningen med den här studien var att undersöka plantmognadens inverkan på smältbarhet samt på partikelstorlek i träck hos hästar utfodrade med hösilage skördat i juni, juli och augusti. Analys av skattad smältbarhet av torrsubstans samt partikelstorlek i träck genomfördes på foder och träckprov sparade från ett utfodringsförsök genomfört under hösten 2009. Tolv hästar användes i en change-overstudie och delades in i tre grupper och utfodrades under tre perioder med tidigt (juni), mellan (juli) eller sent (augusti) skördat hösilage. Under varje period togs träckprov från hästarna en gång per dag, vilka sedan poolades till ett prov per häst och period. Totalt analyserades 36 träckprover. Smältbarheten av ts för de olika hösilage foderstaterna beräknades efter analys av den inre markören saltsyraolöslig aska, i foder och träckprover. Smältbarheten av ts som skiljde sig mellan de tre hösilagen, var högst för junihösilaget och lägst för augustihösilaget. Mellan perioder eller hästar var det ingen skillnad i smältbarhet. Efter att häst 8 och 9, som hade höga smältbarhetsvärden för foderstaten med augustihösilaget, uteslutits från den statistiska analysen blev det dock skillnad i smältbarhet även mellan hästar. Partikelstorlek i träck bestämdes genom våtsiktning med såll av olika storlekar. Fördelningen av partikelstorlek i träck skiljde sig mellan foder men inte mellan perioder eller hästar. Foderstaten med junihösilage skiljde sig från foderstaterna med juli- och augustihösilage i alla fraktioner som var mindre än 2,0 mm. Juli- samt augustihösilaget hade en större andel träckpartiklar i de mellersta fraktionerna (0,1 - < 2,0 mm) i jämförelse med juni hösilaget. Foderstaten med junihösilage hade störst andel partiklar i den minsta fraktionen (<0,1 mm). I fraktionen 0,2 mm var det skillnad mellan alla hösilage foderstater, där den största andelen var representerad av augusti hösilaget, följt av juli- och junihösilaget. I fraktionen med störst partikelstorlek (>2,0 mm) var det ingen skillnad mellan foder. Över 70 % av träcken hamnade på sållet med den största maskstorleken (2,0 mm). Enligt den här studien leder en ökad plantmognad hos vallen till ett mindre smältbart vallfoder för djurslaget häst. Ett hösilage med högre smältbarhet av ts, gav fler partiklar som var mindre än 0,1 mm. Ett mindre smältbart, och mer lignifierat, hösilage verkar dock resultera i fler träckpartiklar mellan 0,1 och 2,0 mm. SLU/Dept. of Animal Nutrition and Management (until 231231) 2010 H2 eng swe https://stud.epsilon.slu.se/2030/ |
| spellingShingle | plant maturity haylage digestibility faecal particle size in horses acid-insoluble ash Wickström, Emelie Effect of plant maturity at harvest of haylage on digestibility and faecal particle size in horses fed forage-dominated diets |
| title | Effect of plant maturity at harvest of haylage on digestibility and faecal particle size in horses fed forage-dominated diets |
| title_full | Effect of plant maturity at harvest of haylage on digestibility and faecal particle size in horses fed forage-dominated diets |
| title_fullStr | Effect of plant maturity at harvest of haylage on digestibility and faecal particle size in horses fed forage-dominated diets |
| title_full_unstemmed | Effect of plant maturity at harvest of haylage on digestibility and faecal particle size in horses fed forage-dominated diets |
| title_short | Effect of plant maturity at harvest of haylage on digestibility and faecal particle size in horses fed forage-dominated diets |
| title_sort | effect of plant maturity at harvest of haylage on digestibility and faecal particle size in horses fed forage-dominated diets |
| topic | plant maturity haylage digestibility faecal particle size in horses acid-insoluble ash |