| INTRODUC TI ONNutritional management strategies in increase grain proportion to meet demand for energy should cover risk for and prevention of subclinical ruminal acidosis (SARA). It is characterized by increased total volatile fatty acid (VFA) concentration and propionate fraction and decreased ruminal pH (5.2-5.8) and acetate fraction. Meanwhile, ruminal lactate concentration exceeds 5-10 mM (Keunen et al., 2002).Ruminal pH kinetics parameters (i.e., minimal pH level and time below critical pH level) are diagnostic markers for SARA. The degree of severity of acidosis is more related to time below critical pH level, rather than the mean pH level (Keunen et al., 2002). To maintain normal flora and biological processes in the rumen as well as prevent SARA, daily mean ruminal pH should not be less than 6.16 and time for pH less than 5.80 should not be longer than 5.24 hr in high-producing cows (Zebeli et al., 2008).
Wheat and oats, and to a lesser extent triticale, provided higher quality forages than barley and rye. All cereal species had poor feeding qualities between ear emergence and milk stages (Z 71-75). © 2016 Society of Chemical Industry.
SummaryThis study was carried out in two experiments. Experiment 1 was conducted with six ruminally-cannulated one-year old Kangal Akkaraman male lambs, using a crossover design with 2 periods to determine the effects of live yeast culture supplementation on rumen fermentation. Yearlings were either supplemented with 4 g/d of Saccharomyces cerevisiae (BeneSacc, 4x10 9 CFU/g) or not supplemented (control). Animals were penned individually, and were fed a diet composed of 25% forage and 75% concentrate for sixteen days. Rumen fluid was sampled on day 16, 0 h (before feeding), 3 h and 6 h after feeding. Rumen pH, the numbers of protozoa, ammonia-N and volatile fatty acids (VFA) were determined in samples. Molar proportions of acetate were decreased, and propionate was increased with supplementation of live yeast culture. No differences were observed for ruminal pH, protozoa population, total VFA and ammonia-N concentrations, between treatments. In Experiment 2, in situ nutrient degradability of barley grain, corn dried distillers grains with solubles (DDGS) and wheat straw were determined. Live yeast culture supplementation did not affect dry matter (DM) degradability of barley, DDGS or straw, crude protein (CP) degradability of DDGS, nor neutral detergent fiber (NDF) degradability of straw. But, it reduced the potential degradability of DDGS in rumen.. Keywords: Yeast, Yearling Lamb, Rumen fermentation, Degradability Canlı Maya Kültürünün (Saccharomyces cerevisiae) Toklularda Rumen Fermentasyonu ve Besin Madde Yıkılabilirliği Üzerine Etkileri ÖzetBu çalışma 2 deneme şeklinde yürütüldü. Deneme 1, canlı maya kültürü ilavesinin rumen fermentasyonu üzerine etkilerini tespit etmek için, rumen kanülü yerleştirilmiş 6 baş bir yaşlı Kangal Akkaraman erkek toklu ile çapraz deney düzenine göre iki dönem halinde yürütüldü. Grubun biri kontrol olarak tutulurken, diğerinin yemlerine günlük 4 g Saccharomyces cerevisiae içeren canlı maya (BeneSacc, KOB=4x10 9 ) kültürü ilave edildi. Hayvanlar bireysel bölmelerde tutuldu ve %25'i yonca, %75'i kesif yemden oluşan rasyonlarla 16 gün süreyle beslendi. 16. günde hayvanlardan yemleme öncesi, yemlemeden 3 ve 6 saat sonra rumen sıvısı örnekleri alındı. Örneklerde pH, protozoon sayısı, amonyak N'u ve uçucu yağ asitleri (UYA) belirlendi. Canlı maya kültürünün ilavesi ile asetik asit oranı azaldı, propiyonik asit oranı arttı. Ruminal pH, protozoon konsantrasyonu, toplam UYA'leri ve amonyak N'u, bakımından muameleler arasında farklılık gözlenmedi. İkinci denemede; arpa, kurutulmuş mısır damıtma ürünü (KMDÜ) ve samanın in situ besin madde yıkılabilirlikleri tespit edildi. Canlı maya kültürü ilavesi arpa, KMDÜ, samanın KM yıkılabilirliğini, KMDÜ'nün ham protein, samanın NDF yıkılabilirliğini etkilemedi. Fakat KMDÜ'nün rumende potansiyel yıkılabilirliğini düşürdü.
This study was carried out to determine the effects of pellet and extruded foods on gelatinization, digestibility and faecal quality of dogs. In study 30 adult male dogs of mixed breed, weighing 15-30 kg, neutered and around 1-3 of age were used. The two tested dog-food formulations had the same composition, but one was produced in pellet form, while the other was extruded in a private factory. Feeding experiments were conducted at the Dog Unit of the Veterinary Faculty in Selçuk University. Pelleted and extruded food contained 4.87% and 17.81% gelatinized starch, respectively (P<0.001). Tested dogs preferred extruded food at a rate of 0.66. The digestibility, faecal score, and cost of pelleted, extruded, imported, and domestic dog food were compared. The most common commercial brands were selected for the latter two categories. Based on faecal samples, the dry matter digestibility of the four dog-food types was 81.2%, 84.2%, 83.7%, 83.5% (P<0.05) respectively. The faecal score was 3.48 for dogs that consumed pelleted food and 3.68-3.91 for dogs fed the other three extruded foods. Cost calculations revealed that extruded food is five times more economical than imported food. Keywords: Extruded, Dog food, Digestibility, Pellet, Preference Pelet ve Ekstrude Mamaların Köpek Beslemede Kullanılması ÖzetBu çalışma pelet ve ekstrude formda üretilen mamaların jelatinizasyon, köpeklerde sindirilebilirlik ve dışkı kalitesine etkilerinin belirlenmesi amacıyla yapıldı. Çalışmada 15-30 kg ağırlıkta kısırlaştırılmış 30 adet 1-3 yaşlı karışık ırk erkek köpek kullanıldı. Bileşimi aynı olan iki formülün biri pelet şeklinde, diğeri ekstrude formda özel bir tesiste üretildi. Yedirme denemeleri Selçuk Üniversitesi Veteriner Fakültesi Köpekçilik Ünitesinde yürütüldü. Jelatinize nişasta oranı pelet mamada %4.87, ekstrude mamada %17.81 (P<0.001) bulundu. Ekstrude mamanın köpekler tarafından tercih edilme oranı 0.66 olarak tespit edildi. Bu çalışmada üretilen pelet ve ekstrude mamalar, piyasada en çok bilinen biri ithal ve biri yerli olan ticari mamalar ile sindirilebilirlik, dışkı skoru ve maliyet bakımından karşılaştırıldı. Pelet, ekstrude, ithal ve yerli ticari mamaların dışkı toplama yöntemiyle belirlenen kuru madde sindirilebilirlikleri sırasıyla %81.2, 84.2, 83.7, 83.5 (P<0.05) olarak tespit edildi. Dışkı skoru pelet mama tüketenlerde 3.48 bulundu, diğer üç ekstrude mamaları tüketenlerde 3.68-3.91 arasında idi. Maliyet hesaplamasında bu çalışmada üretilen ekstrude mama ile köpek beslemenin ithal mamadan 5 kat daha ekonomik olabileceği belirlendi.
This study was carried out to determine the preferences of dogs for some commonly used fat sources in dog food. Three different types of food were produced using 5% additional sunflower oil, poultry fat, or beef tallow. The food was extruded using a twin-screw extruder at approximately 25% moisture and temperatures in the range of 90 °C to 135 °C. The extrudates were dried for 30-45 min at temperatures of up to 148 °C in a belt dryer. Next, the heated fats were sprayed onto the extrudates. The foods were cooled, sampled, and packaged. A total of 30 neutered adult (between 1 and 3 years old) male dogs were used. The preference of the dogs for the 3 different fat sources was determined via a 2-pan preference test. Preference tests were conducted for 12 days in pairs, and the dogs consumed each food for 8 days. The dogs had the greatest preference for food containing the additional sunflower oil, with a preference rate of 56%. Beef tallow was the least preferred fat, with a preference rate of 44%. Dogs preferred food containing sunflower oil more than food containing animal fats. It was concluded that dogs showed a preference in proportion to the linoleic acid level in each food.
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