“Effect of summer stress on rumen function and microbiota in crossbred cattle”
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Date
2021-12-13, 2021-12-13
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Sher-e-Kashmir University of Agricultural Sciences & Technology, Jammu (J&K)
Sher-e-Kashmir University of Agricultural Sciences & Technology, Jammu (J&K)
Sher-e-Kashmir University of Agricultural Sciences & Technology, Jammu (J&K)
Abstract
Heat stress is the most concerning abiotic stressor due to present changing climatic scenario. Heat stress results in reduced growth, production, as well as increases vulnerability of animals to diseases. To date, very little attention has been given to comprehensive detailed data on the adverse effect of heat stress on rumen. Therefore, the present study was undertaken to find out the adverse effects of summer stress on rumen function and its microbial population as well as to study the alleviation of summer stress by providing cold drinking water to summer stressed cross bred cattle. The study was conducted with six numbers of crossbred cattle of similar age and sex selected from animals of ILFC, F.V.Sc & A.H., R.S. Pura during the month of March and July-August, 2021. As the climatic condition in the month of March 2021 was not producing stress based on calculated temperature humidity index (70.02±0.49) for cattle (NRC, 1971) considered as control. During July-August 2021, the effect of summer stress on rumen function was studied confirming the stress produced in animals based on THI value (80.50±1.94) and increased expression of intracellular superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidise (GPx) activities. Results of study indicate that summer stress was not only significantly (p<0.05) affected feed and water intake, but also produced significant (p<0.05) adverse effects on the studied parameters related to rumen function (colour, consistency, odour, sedimentation rate, pH, methylene blue reduction time, carboxymethyl cellulase activity, and volatile fatty acid profile). Though summer stress did not affect the number of total microbial population and population of selected fibrolytic rumen bacteria (Ruminococcus flavefaciens and Ruminococcus albus), it affected adversely the blood biochemicals (glucose, total protein, blood urea nitrogen, creatinine, ALT and AST). Provision of cold drinking water to summer stressed cross bred cattle, not only provide cooling effect to the animals, but also improved significantly (p<0.05) the deranged parameters related to rumen function and blood biochemicals towards values observed during comfortable climatic condition.
Heat stress is the most concerning abiotic stressor due to present changing climatic scenario. Heat stress results in reduced growth, production, as well as increases vulnerability of animals to diseases. To date, very little attention has been given to comprehensive detailed data on the adverse effect of heat stress on rumen. Therefore, the present study was undertaken to find out the adverse effects of summer stress on rumen function and its microbial population as well as to study the alleviation of summer stress by providing cold drinking water to summer stressed cross bred cattle. The study was conducted with six numbers of crossbred cattle of similar age and sex selected from animals of ILFC, F.V.Sc & A.H., R.S. Pura during the month of March and July-August, 2021. As the climatic condition in the month of March 2021 was not producing stress based on calculated temperature humidity index (70.02±0.49) for cattle (NRC, 1971) considered as control. During July-August 2021, the effect of summer stress on rumen function was studied confirming the stress produced in animals based on THI value (80.50±1.94) and increased expression of intracellular superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidise (GPx) activities. Results of study indicate that summer stress was not only significantly (p<0.05) affected feed and water intake, but also produced significant (p<0.05) adverse effects on the studied parameters related to rumen function (colour, consistency, odour, sedimentation rate, pH, methylene blue reduction time, carboxymethyl cellulase activity, and volatile fatty acid profile). Though summer stress did not affect the number of total microbial population and population of selected fibrolytic rumen bacteria (Ruminococcus flavefaciens and Ruminococcus albus), it affected adversely the blood biochemicals (glucose, total protein, blood urea nitrogen, creatinine, ALT and AST). Provision of cold drinking water to summer stressed cross bred cattle, not only provide cooling effect to the animals, but also improved significantly (p<0.05) the deranged parameters related to rumen function and blood biochemicals towards values observed during comfortable climatic condition.
Heat stress is the most concerning abiotic stressor due to present changing climatic scenario. Heat stress results in reduced growth, production, as well as increases vulnerability of animals to diseases. To date, very little attention has been given to comprehensive detailed data on the adverse effect of heat stress on rumen. Therefore, the present study was undertaken to find out the adverse effects of summer stress on rumen function and its microbial population as well as to study the alleviation of summer stress by providing cold drinking water to summer stressed cross bred cattle. The study was conducted with six numbers of crossbred cattle of similar age and sex selected from animals of ILFC, F.V.Sc & A.H., R.S. Pura during the month of March and July-August, 2021. As the climatic condition in the month of March 2021 was not producing stress based on calculated temperature humidity index (70.02±0.49) for cattle (NRC, 1971) considered as control. During July-August 2021, the effect of summer stress on rumen function was studied confirming the stress produced in animals based on THI value (80.50±1.94) and increased expression of intracellular superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidise (GPx) activities. Results of study indicate that summer stress was not only significantly (p<0.05) affected feed and water intake, but also produced significant (p<0.05) adverse effects on the studied parameters related to rumen function (colour, consistency, odour, sedimentation rate, pH, methylene blue reduction time, carboxymethyl cellulase activity, and volatile fatty acid profile). Though summer stress did not affect the number of total microbial population and population of selected fibrolytic rumen bacteria (Ruminococcus flavefaciens and Ruminococcus albus), it affected adversely the blood biochemicals (glucose, total protein, blood urea nitrogen, creatinine, ALT and AST). Provision of cold drinking water to summer stressed cross bred cattle, not only provide cooling effect to the animals, but also improved significantly (p<0.05) the deranged parameters related to rumen function and blood biochemicals towards values observed during comfortable climatic condition.