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| Witten, Stephanie; Grashorn, Michael; Aulrich, Karen. |
| A linear regression approach was used to determine the precaecal digestibility of organic field beans and field peas in young broiler chickens. Diets with field beans of the variety Taifun (283 g crude protein/kg DM) and field peas of the variety Alvesta (173 g crude protein/kg DM) in three inclusion rates (30, 50, and 70%) were fed ad libitum to 15- to 21-day-old broiler chickens. Digesta was sampled pen-wise and obtained from the gastro-intestinal tract between Meckel’s diverticulum and 2 cm anterior to the ileo-caeco-colonic junction. Despite the high inclusion rates of the test feedstuffs, all diets were accepted by the birds. Feed intake and body mass gain, as well as precaecal crude protein and amino acid digestibility, were higher in chickens fed... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Feeding and growth Poultry. |
| Ano: 2018 |
URL: http://orgprints.org/33531/1/Wittenetal2018pcVQ.pdf |
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| Lorenz, Carina; Kan, Torsten; Grashorn, Michael. |
| The objective of this study was to evaluate the variation of feed intake from pasture in organic broilers and in laying hens. In the broiler experiment, in total 288 broilers of breeds Ross 708 (fast growth; FG), Isa 657 (medium growth; MG) and Isa 757 (slow growth, SG) were kept in mixed groups. Between week 7 and 12 of life birds were slaughtered, crops and gizzards were collected and investigated for contents of feed, grit and plant particles. FG broilers had higher feed proportions in crops than MG and SG broilers. Proportions of plant particles have been higher in SG broilers than in MG and FG broilers. SG broilers had higher proportions of plant particles and grit in the gizzard. It is estimated that the proportion of plant particles amounts to 5-10... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Animal husbandry; Feeding and growth. |
| Ano: 2013 |
URL: http://orgprints.org/21315/1/21315_Grashorn.pdf |
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| Witten, Stephanie; Grashorn, Michael; Aulrich, Karen. |
| Especially in areas with suboptimal conditions for the cultivation of soybeans, homegrown grain legumes, like faba beans and field peas, are very important protein feedstuffs for monogastric animals, like swine and poultry, in organic farming. Homegrown grain legumes contribute to the circular ecology of organic farms and add to the supply of essential amino acids to the diet. However, their value is not only determined by the crude protein content and amino acid profile but also by the bioavailability of crude protein and amino acids. Since only precaecally absorbed amino acids are potentially available in the metabolism, the precaecal digestibility of the crude protein and the amino acids can give a hint on their bioavailability. The aim of the study... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds Feeding and growth Poultry. |
| Ano: 2019 |
URL: http://orgprints.org/35571/1/Wittenetal2019_ILS3.pdf |
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| Ritteser, Carolin; Grashorn, Michael. |
| Der hohe Methioninbedarf von wachsendem Geflügel kann im Moment nur über den Einsatz von Hoch-Proteinfuttermitteln aus konventionellem Anbau (<5 %) halbwegs gedeckt werden. Zur langfristigen Sicherstellung der Methinonversorgung von wachsendem Geflügel sind daher die Erkenntnisse zu den Nährstoffgehalten und deren Verdaulichkeit von möglichst vielen ökologischen Futtermitteln zu erweitern. Im Rahmen des Projektes wurden daher zunächst die Nährstoffgehalte von verschiedenen Futtermitteln aus ökologischem Anbau (11 Energiefuttermittel - Weizen, Gerste, Roggen, Tritikale, Nacktgerste, Nackthafer, Buchweizen, Dinkel Rispenhirse, Braunhirse, Mais-Ganzkorn-Silage, 1 Proteinfuttermittel - Linsenausputz und 3 Rohfaser-reiche Futtermittel - Kleegrassislage... |
| Tipo: Report |
Palavras-chave: Feeding and growth; Poultry. |
| Ano: 2015 |
URL: http://orgprints.org/29363/1/29363-11OE070-uni-hohenheim-grashorn-2015-energiefuttermittel-huehnermast.pdf |
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