Besi sığırı rasyonlarında tamamlayıcı yem olarak farklı şekillerde işlenmiş arpa ve mısır kullanımının performans, bazı biyokimyasal parametreler ile serum laktat ve bikarbonat düzeyi üzerine etkileri. Harran Tarim ve Gida Bilimleri Dergisi, 22(2): 275-283

How to Cite This ArticleDemirtas A, Musa SAA, Pekcan M, Salgirli Demirbas Y, Piskin I, Emre B, Toprak N, Ozturk H: Effects of cleavers (Galium aparine) and yarrow (Achillea millefolium) extracts on rumen microbial fermentation in in-vitro semi-continuous culture system (RUSITEC). Kafkas Univ Vet Fak Derg, 26 (3): 385-390, 2020. AbstractExperimental data on the effects of cleavers (Galium aparine) and yarrow (Achillea millefolium) extracts on rumen microbial fermentation are scarce. The objective of this study was to determine the effects of cleavers and yarrow extracts on in vitro ruminal fermentation. Incubation trial was carried out using the long-term rumen simulation technique (RUSITEC). The experiment lasted 10 days. After an adaptation period of 5 days, the fermentation vessels divided into 3 groups; first three vessels received no additives (control), second three vessels received 500 mg/L cleavers extract daily, and third three vessels received 500 mg/L yarrow extract daily. Supplementations of cleavers and yarrow extracts had no significant effect on ruminal pH, total volatile fatty acids (VFA), acetate, propionate and methane production, NH3-N concentration and, total protozoa. However, both extracts decreased dry matter digestibility (DMD) (P<0.05). Butyrate production, on the other hand, increased with cleavers extract (P<0.05). In conclusion, there were only small effects of cleavers and yarrow extracts on the investigated microbial fermentation characteristics. Nevertheless, it may be considered advantageous for feed conversion that plant extracts did not suppress ruminal fermentation in spite of decreasing DMD. Yoğurt Otu (Galium aparine) ve Civan Perçemi (Achillea millefolium) Ekstraktlarının In-vitro Yarı-Sürekli Kültür Sisteminde (RUSITEC) Rumen Mikrobiyal Fermentasyonu Üzerine EtkileriÖz Yoğurt otu (Galium aparine) ve civan perçemi (Achillea millefolium) ekstraktlarının rumen mikrobiyal fermentasyonu üzerine etkileri ile ilgili sınırlı düzeyde deneysel veri bulunmaktadır. Bu çalışmanın amacı, yoğurt otu ve civan perçemi ekstraktlarının in vitro ruminal fermentasyon üzerine etkilerinin araştırılmasıdır. Inkübasyon denemesi uzun-süreli rumen simülasyon tekniği (RUSITEC) kullanılarak gerçekleştirilmiştir. Deneme 10 gün sürmüştür. Beş günlük bir adaptasyon periyodunu takiben fermenterler 3 gruba bölünmüştür; ilk üç fermentere ilave yapılmamış (kontrol), ikinci üç fermenterlik gruba günlük 500 mg/L yoğurt otu ekstraktı, üçüncü üç fermenterlik gruba ise günlük 500 mg/L civan perçemi ekstraktı eklenmiştir. Yoğurt otu ve civan perçemi ilaveleri, ruminal pH, toplam uçucu yağ asitleri (UYA), asetat, propiyonat ve metan üretimi, NH3-N konsantrasyonu ve toplam protozoa üzerine önemli bir etki oluşturmamıştır. Ancak her iki ekstrakt da kuru madde sindirilebilirliğini (KMS) azaltmıştır (P<0.05). Diğer taraftan, bütirat üretimi, yoğurt otu ekstraktı ilavesi ile artış göstermiştir (P<0.05). Sonuç olarak, incelenen mikrobiyal fermentasyon özellikleri üzerine yoğurt otu ve civan perçemi ekstraktları sadece küçük...

The aim of the present study was to investigate the effect of digestible amino acid (DAA) based formulation strategy, and l-valine (l-Val), l-isoleucine (l-Ile) and l-arginine (l-Arg) supplementation to reduce the crude protein (CP) level of broiler diets on performance, carcass characteristics and protein efficiency ratio by comparing with the control diet formulated on total amino acid base. A total of 792 one-day-old Ross 308 broiler chicks were divided into 48 floor pens, with 24 pens containing 16 chicks and 24 pens containing 17 chicks. The experiment was organized in a completely randomized block design with four dietary treatments as follows; T1: formulated to meet minimum both total amino acid and DAA requirements without using l-Val, l-Ile, and l-Arg, T2: formulated to meet DAA requirements without using l-Val, l-Ile and l-Arg, T3: formulated to meet DAA requirements by using l-Val alone, T4: formulated to meet DAA requirements by using l-Val, l-Arg, and l-Ile. Each treatment had 12 replicates. Neither l-Val (T3) nor l-Val, l-Ile, and l-Arg supplemented (T4) low CP dietary treatments had any negative impact on growth performance, feed conversion ratio during experimental periods, as well as carcass parameters of broilers. Indeed, CP reduction by the addition of l-Val alone or l-Val, l-Ile, and l-Arg together even resulted in a significant improvement in protein efficiency ratio compared to T1 and T2 treatments. Supplementation of l-Val either alone or along with l-Ile and l-Arg to diets formulated based on DAA not only decreased dietary CP but also soybean meal inclusion. It can be concluded that maintained growth performance, and even improved protein utilization can be achieved due to the DAA based formulation strategy and supplementing broiler diets with l-Val alone or together with l-Ile and l-Arg.

The aim of the study was to investigate the effects of Pinus brutia bark extract, which is rich in polyphenolic compounds of tannins, on both pure and mixed continuous cultures of rumen bacteria and archaea, as well as on rumen fermentation characteristics in vitro. Antimicrobial susceptibility assay with pure cultures was carried out in an anaerobic chamber. Pinus brutia bark extract exhibited a potential inhibitor activity (P<0.05) against pure cultures of Ruminococcus flavefaciens, Eubacterium ruminantium, and Methanobacterium formicicum while a growth stimulatory effect (P<0.05) was observed for Ruminoccocus albus, Butyrivibrio fibrisolvens, and Streptococcus bovis. Pinus brutia bark extract only had a potential inhibitor effect (P<0.05) on R. albus at the highest dose (1200 µg/mL). Pinus brutia bark extract also stimulated (P<0.05) the growth of pure cultures of Fibrobacter succinogenes, while it did not affect Megasphaera elsdenii, except at the highest dose. The effects of two doses (75 and 375 mg/L) of P. brutia bark extract on in vitro mixed cultures and rumen fermentation parameters were determined by the rumen simulation technique (Rusitec). Supplementation with P. brutia bark extract led to a quadratic decrease (P<0.05) in the cell numbers of R. flavefaciens. Production of total and individual short chain fatty acids (SCFA), acetate to propionate ratio (C2/C3), total protozoa, ruminal pH, and dry matter digestibility (DMD) did not change in the presence of P. brutia bark extract. Supplementation with both doses of P. brutia bark extract decreased (P<0.05) the ammonia-N concentrations. Ammonia-N concentration was lowest in the high-supplemented group (P<0.05). As a conclusion, inhibitory effects of P. brutia bark extract on some species in the pure cultures were in the same direction as with mixed ruminal cultures, while stimulatory effects disappeared. The lack of inhibitory effects on protozoa and on a large number of Gram-positive rumen bacteria in the mixed cultures suggests that its mechanism of action is not exactly similar to antibiotics. Although P. brutia bark extract did not alter ruminal SCFA, it could have potential to improve ruminal protein utilization without depressing rumen microbial fermentation.

The objective of this study was to investigate the effects of milk Macleaya cordata extract supplementation on the weight gain, feed intake, serum total protein (TP), albumin, globulin, IgG, blood urea nitrogen (BUN), triglyceride (TG), beta-hydroxy butyric acid (BHBA) levels, alkaline phosphatase (ALP), aspartate aminotransferase (AST), alanine aminotransferase (ALT) levels and total aerobic, lactobacillus and coliform bacterial counts of recto-anal swabs in Simmental calves. The feeding study was carried out using 20 (n = 10) 4-day-old Simmental calves (average birth weight 45.55 ± 1.53 kg) from December 2017 to May, 2018. The experimental treatments comprised milk without any additive (control) and milk with 1 g M. cordata extract added per head per day. The calves were fed with only colostrum until 4 days of age and then with 5 liters per day of whole milk until the end of 65 days. At the end of the study, a significant difference in body weights and feed efficiency between the groups was not observed. During the 4th-6th weeks of the trial, M. cordata extract supplementation in milk decreased the feed intake of the calves. The serum TP, albumin, IgG, BHBA, TG, BUN, ALP and ALT levels were also found to be not statistically different between the treatment groups. At the end of the experiment the serum albumin and BHBA levels were increased, whereas the BUN levels were decreased. There was a significant effect of the group × sex interaction on the serum AST levels. The total aerobic, total coliforms, and lactobacillus bacterial counts of the recto-anal swabs were not different between the experimental groups. In conclusion, the present data demonstrated that supplementation of pre-weaning calves’ milk with M. cordata at 1 g per day did not improve growth performance but changed their metabolic status.