The Influence of Solar Radiation on the Antioxidant Systems in Blood of Dairy Cows and the Processing of the Data Using Wavelets Transforms

Abstract

The purpose of this paper was to observe if in cattle, exposed to the solar radiation, could be noticed a certain reaction of the organism related to the oxidative stress. The study was made in the period May - August 2014, on a group of 16 Romanian Simmental dairy cows, kept on pasture during the day. The processing of the determined data were made using wavelet transforms (In-Place Fast Haar Wavelets Transform). The results of the experiment shown that when Temperature Humidity Indexes (THI) are higher than 72 (the superior limit for thermal comfort in cattle), the oxidative stress appeared in dairy cows. This oxidative stress was mainly manifested by the increasing of superoxide dismutase with 95% in August compared to May, followed by the increasing of the catalase with 79% and of glutathione peroxidase with 13%. The increasing of the antioxidant enzymes level was directly co-related with THI. We considered that the determination of the antioxidant enzymes level was an appropriate model for studying the influence of hot environment on the oxidative status of dairy cows. The wavelets transforms can be easier applied to practical data compared to the classical statistical methods.