Nasrin Mahdavirad; Morteza Chaji; Mohammad Bojarpour; Mehdi Dehghan banadaki
Abstract
The aim of present experiment was to investigate the buffering capacity of some buffers or alkalizers, their effect on digestion and fermentation of high concentration diets. The concentration of 0, 0.5, 1, 1.5, 2 g in 100 ml from different buffers and alkalizing agents including: sodium bicarbonate, ...
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The aim of present experiment was to investigate the buffering capacity of some buffers or alkalizers, their effect on digestion and fermentation of high concentration diets. The concentration of 0, 0.5, 1, 1.5, 2 g in 100 ml from different buffers and alkalizing agents including: sodium bicarbonate, sodium sesquicarbonate, magnesium oxide, magnesium carbonate, sodium bentonite, zeolite and combined buffer (0.75% sodium bicarbonate+ 0.75% sodium sesquicarbonate) was used. The initial pH of the buffer solution, the amount of consumed hydrochloric acid for abrupt changes of pH to 5.2 or below it, and the final pH was registered. The lowest amount of the hydrochloric acid was consumed for solutions containing sodium bentonite, magnesium oxide, magnesium carbonate and control for suddently dropping their pH; and highest amount by sodium sesquicarbonate, combined buffer and sodium bicarbonate, respectively. The zeolite buffer also indicated a proper resistance to pH changes and did not have a significant difference with the combined buffer or sodium bicarbonate buffer. The treatments in gas production were included: control or basal diet without buffer, and amounts of 0.5 to 2% sodium bicarbonate, 0.5 to 2% sodium sesquicarbonate, 0.5% sodium bentonite, 2% magnesium carbonate, 1.5, 2 and 2.5% of zeolite and combined buffer, which were added to basal diet. The highest produced gas was in the sodium sesquicarbonate, sodium bicarbonate, combined buffers and zeolite. Therefore, sodium sesquicarbonate, combined buffers, sodium bicarbonate and zeolite had the best position respectively, which were evaluated as suitable buffers for using in diets containing high concentration ingredients for feeding the ruminant animals.
Behrouz Yarahmadi; Morteza Chaji; Mohammad Boujarpour; Khalil Mirzadeh; Morteza Rezaei
Abstract
This experiment was carried out to study the effects of sainfoin (Onobrychis viciifolia) as tannin source and different level of forage: concentrate ratio on digestibility, blood parameters, ruminal fermentation, milk yield and milk composition in milking ewes. Therefore, eight Lori milking ewes were ...
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This experiment was carried out to study the effects of sainfoin (Onobrychis viciifolia) as tannin source and different level of forage: concentrate ratio on digestibility, blood parameters, ruminal fermentation, milk yield and milk composition in milking ewes. Therefore, eight Lori milking ewes were alocated to factorial experiment base on the 4×4 replicated Latin square design. Four total mixed ration diets were formulated with two level of concentrate and two level of intake forage which consisted of forage: concentrate ratios of 35:65 high concentrate without sainfoin (HC), 65:35 low concentrate without sainfoin (LC), 35:65 high concentrate with sainfoin (HCS) and 65:35 low concentrate with sainfoin (LCS). Total phenols, total and condensed tannin among treatments were significantly different (P<0.05). Digestibility of DM and OM in the HCS treatment were higher compared to the other treatments (P<0.05). The ruminal pH and NH3-N values in HCS and HC diets were lower than those fed HC diet. The concentration of ruminal VFAs in ewes received low concentrate diet were higher (P<0.05). The acetate to propionate ratio was lower in HC and HCS treatments. The results showed milk yield in HC and HCS treatments was greater than other treatments (P<0.05). Level of concentrate effect were significant on milk fat, lactose, SNF and protein (P<0.05). In total, adding to sainfoin as a tannins source to diet with high concentrate ratio (65%) increased organic matter and fiber digestibility, and also increased ruminal propionate and finally, increased milk yield and protein.
Fateme Shakarami; Morteza Chaji; Moosa Eslami; Tahereh Mohammadabadi; Mohammad Bojarpour
Abstract
This study was conducted to compare fungi and whole rumen microorganisms (WRM) digestibility of treated sugarcane pith by fungi and of buffalos and Holstein cows. Dry matter (DM), neutral and acid detergent fiber (NDF and ADF) digestibilities of steam treated sugarcane pith (STP) by fungi and WRM were ...
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This study was conducted to compare fungi and whole rumen microorganisms (WRM) digestibility of treated sugarcane pith by fungi and of buffalos and Holstein cows. Dry matter (DM), neutral and acid detergent fiber (NDF and ADF) digestibilities of steam treated sugarcane pith (STP) by fungi and WRM were compared with a two-steps digestion technique, gas production (GP) and specific rumen fungi culturing (SRFC). Dry matter, NDF and ADF digestibilities of steam treated sugarcane pith by WRM in buffalo were higher (62, 32.31 and 22%, respectively) than cow (50.13, 27.07 and 16.2%, respectively) (P<0.05). Regardless of microorganisms type, digestibility of DM, NDF and ADF were greater in buffalo (54.13, 27.51 and 19.86%) than in buffalo (49.69, 24.54 and 14.67) (P<0.05). Potential of GP (B) of STP by WRM in cow was numerically more than that of cow (P>0.05). Fractional rate of GP (C) for WRM and fungi was lower in cow than buffalo (P<0.05). Regardless of microorganisms type, C was higher in buffalo was more than cow (P<0.05) and vice versa for B (P>0.05). Regardless of animal species, whole rumen microorganisms had higher digestibility and potential of GP than fungi (P>0.05), but there was not any difference for rat of GP between them. In SRFC, DM digestibility of STP by fungi at day 12 in buffalo was significantly more than cow (P<0.05). The concentration of fungi per ml of rumen liquer in cow was more than buffalo (P<0.05). Although, the rumen population fungi in cow was more than buffalo, but that digestibility of fungi (in specific rumen fungi culture) and WRM of buffalo was more than cow in present experiment. Therefore, the results of this study showed the advantage and supremacy of buffalo in usage the low quality roughages.
