Effects of feeding buffering mineral mixture on subacute rumen acidosis and some production traits in dairy cows (original) (raw)
Related papers
Journal of the Hellenic Veterinary Medical Society
Subacute ruminal acidosis (SARA; implying a rumen fluid pH between 5.5 and 5.0), is one of the most important metabolic diseases of dairy cows. In this study, the effect of SARA and rumen fluid pH on milk yield and composition was assessed in dairy cows under field conditions, with repeated measurements in the same cows, at different stages of lactation. Rumenocentesis was performed in 83 Holstein cows of a commercial herd at 30, 90, and 150 days in milk (DIM). Rumen fluid pH was measured on-site using a portable pH-meter. Milk yield was also recorded at the same days. Milk samples were analyzed for fat, protein, lactose and total solids content. For the statistical analysis, mixed linear regression models were used. Prevalence of SARA was 48.2%, 53.8% and 65.3% at 30, 90 and 150 DIM, respectively. There was a significant negative effect of SARA and decreased rumen fluid pH on milk fat content; SARA was associated with a decrease of milk fat content by 0.22%, while a one-unit increa...
Clinical Indicators Dictated by Subacute Rumen Acidosis (SARA) Condition in Cows for Milk Production
2013
The study was conducted to evaluate the incidence of subacute rumen acidosis in cattle and impact of this situation (SARA) in the pH of the urine, in rumen contractions and faecal physical qualities. In four cow farms were checked 87 samples from rumen content sample through the nasoesophagal probe and equally urine samples at the cows in start of lactation and in middle lactation. All animals were checked clinically for rumen contractions and faecal physical qualities. Esteemed affected by SARA condition, cows which had pH of rumen content 5.5 and less. From the total heads in the experiment were found 24 cows (27.58 %) with SARA condition. Of these, 15 heads (32.6 %) were at the beginning of lactation and 9 heads (21.95%) in mid-lactation. pH of the urine seems influenced by the pH value of the rumen contentst. Among these indicators related to positive character dependency (r = 0403). pH of the rumen contents affects the number of its contractions. The results showed poor korelative and negative character (r = -0329). Physical qualities and faecal structure were also affected by the pH values of rumen contents. pH of the urine, the number and strength of ruminal movements and with them the changes in the physical structure of faecal can be used for early diagnosis of SARA condition in cows.
Journal of entomology and zoology studies, 2018
The dairy industry is under pressure to fulfil the increasing demands of milk and milk products. For this reason, dairy farms are growing in size and utilizing state-of-art technologies in an attempt to improve their productivity and efficiency. Additionally, dairy entrepreneurs face the challenge of maintaining the quality of milk. Higher concentrate mixture is required to maintain the production of lactating animals. Feeding high concentrates to high producing animals often upset the rumen environment and compromising the productivity of animals. Different feed additive is used to prevent the occurrence of sub-acute rumen acidosis, among them buffers are commonly used. Studies have shown that buffers not only maintain the rumen homeostasis but also increase the productivity of animals. The literature pertaining to the effectiveness of supplementation of dietary buffer on feed intake, milk production and rumen fermentation pattern in lactating animals is being presented in this rev...
Animals, 2019
The use of high grain rations in dairy cows is related to an increase in rumen acidity. This study investigated whether the rumen acidity status affects rumination time (RT), and the production, composition, coagulation properties (MCPs) and cheese yield (CY) of milk. One hundred early-lactating Holstein cows with no clinical signs of disease and fed total mixed rations were used. Rumen fluid was collected once from each cow by rumenocentesis to determine pH and volatile fatty acid (VFA) content. The cows were classified according to the quartile of rumen acidity (QRA), a factor defined by multivariate analysis and associated with VFA and pH. Rumen fluid pH averaged 5.61 in the first quartile and 6.42 in the fourth, and total VFA content increased linearly with increasing rumen acidity. In addition, RT increased as rumen acidity increased, but only in the daily time interval from 08:00 to 12:00. Milk yield linearly decreased as rumen acidity increased, whereas QRA did not affect pH,...
Sub-acute ruminal acidosis in dairy cows: Its causes, consequences and preventive measures
Online Journal of Animal and Feed Research, 2020
Current feeding programs for cattle prescribe concentrate rich diets to meet their ever increasing demands for high levels of milk production. These diets, however, can impair rumen health and thus cattle production, milk yield and welfare. High energy diets are rapidly fermented in the rumen because they are high in fermentable starch, low in NDF and contain finely chopped digestible forages. Feeding rapidly fermentable diet to the cows predominantly adapted to digest and metabolize forage based total mixed ration (TMR) substantially increases short term milk yield, but the risk of sub-acute ruminal acidosis (SARA) increases. Additionally, too high concentrate to forage ratio, too fast a switch from high forage to high concentrate, diet composed of highly fermented feeds, improperly mixed TMR and mycotoxins in feed also increases the incidence of SARA in dairy herds. SARA causes depressed feed intake, cycling feeding, reduced cud chewing, poor fibre digestion, rumenitis, mastitis, metritis, dehydration, diarrhoea, abomasal displacement, pulmonary bacterial emboli, systemic inflammation, liver abscesses, low milk fat, low milk protein, sore hooves, laminitis and low fertility. Therefore, SARA is a major challenge for animal health, productivity, economic efficiency and welfare issue even in well managed dairy herds. Feeding higher amounts of forages, supplying adequate peNDF, processing grains less thoroughly, reducing fermentability of the carbohydrate fraction and adapting rumen to the dietary changes are the key factors to be considered for preventing SARA. Continued research for accurate quantification of peNDF in diet, grain processing, optimization of meal size, dietary cation-anion balance, narrowspectrum rumen modifier, inoculation of lactate utilizing microbes, inhibition of lactate producing microbes and innovation of the unique fermentability characteristics of feed ingredients to promote sufficient buffering and rapid absorption of VFA from rumen will explore new horizon for reducing incidence of SARA in future.
Asian Journal of Dairy and Food Research, 2021
Background: Subacute ruminal acidosis (SARA) is one of the most important metabolic disease of dairy cattle which decrease milk production, dry matter intake, productivity and increase culling rate and even cause death.Methods: In this study the epidemiological status of SARA namely age, breed, stage of lactation, lactation number, general health condition, body condition score, daily milk production, milk fat content and biochemical alteration were investigated.Result: Out of 100 cows examined 20 were found to be positive for SARA and the mean age of dairy cows suffering from SARA was found to be 6.53 ±0.68 years. The prevalence of SARA was 70 and 30 per cent in Jersey and HF breed of cows respectively and was high in mid lactation and the lactation number ranged from 2 to 6. 65 per cent. SARA affected cows were in poor body condition score, milk production and milk fat content was significantly low (P≤ 0.05). The mean GGT (Gamma Glutamyl Transferase) and AST (Asparate aminotransfe...
Management of Sub-acute Ruminal Acidosis in Dairy Cattle for Improved Production: A Review
2011
Sub-acute ruminal acidosis (SARA) is a well-recognized digestive disorder that is an increasing health problem in most dairy herds. Feeding diets high in grain and other highly fermentable carbohydrates to dairy cows increases milk production, but also increases the risk of SARA. Sub-acute ruminal acidosis is defined as periods of moderately depressed ruminal pH, from about 5.5 to 5.0. Sub-acute ruminal acidosis may be associated with laminitis and other health problems resulting in decreased production. Dairy herds experiencing SARA will have a decreased efficiency of milk production, impaired cow health and high rates of involuntary culling. Reduced ruminal efficiency, liver and lung abscesses, and laminitis are all thought to be related to SARA. The risk of developing SARA can be reduced by adopting a feeding regime, which balances ruminal buffering with the production of volatile fatty acids from fermentation of carbohydrates. Recommendations made for effective characterization,...
Journal of dairy science, 2004
Four multiparous ruminally fistulated Holstein dairy cows were used in an 8-wk experiment utilizing a repeated measures block design to determine the effects of subacute ruminal acidosis (SARA) on supplemented water intake. Animals were subjected to SARA, which was induced by replacing 25% of the ad libitum intake of the total mixed ration (dry matter basis) with 50:50 wheat:barley pellets utilizing a grain challenge model. Cows had free choice from 2 water bowls. One bowl contained water with sodium bicarbonate (SB) supplemented at 2.5 g/L. The other bowl contained unsupplemented water. Ruminal pH was monitored continuously during the trial using indwelling pH probes. The induction of SARA reduced daily mean ruminal pH and increased the duration when ruminal pH was below 6. The total mixed ration intake by the cows decreased during the SARA periods. The overall preference for SB-supplemented water did not change, as the preference ratio was similar during the control and SARA perio...