Sojina melasa u obrocima krava u laktaciji

The aim of this study was to investigate the effects of the use of soybean molasses in the nutrition of lactating cows on their performance and some blood and rumen content parameters. Treatments included isoenergetic and isoprotein rations: total mixed ration (TMR) which included 1 kg of soybean molasses and TMR without soybean molasses. The use of soybean molasses in TMR for lactating cows increased yield of 4 % FCM (5.03 %). There was no difference in milk fat content and yield between treatments. The use of soybean molasses increased the concentration (3.45 vs 3.32 %) and yield (from 0.81 to 0.88 kg/day) of milk protein. Improved utilization of consumed ration dry matter (DM), energy and crude protein by 4.60, 4.81 and 7.82 %, respectively, was confirmed. There was no significant effect of including soybean molasses in TMR on ruminal pH value, number and structure of protozoa population nor on their motility. Soybean molasses had a positive effect on decrease of the urea blood concentration (5.45 vs 6.30 mmol/L) while no significant effects were observed for the concentrations of glucose, Ca and P in blood. Results of this study indicate that soybean molasses, as a source of readily available energy, can be used successfully in rations for lactating cows.Provedeno istraživanje imalo je za cilj ispitati utjecaj korištenja sojine melase u hranidbi krava u laktaciji na proizvodne rezultate i važnije pokazatelje metaboličkog profila. Korišteni su izoenergetski i izoproteinski obroci: TMR koji je uključio 1 kg sojine melase i TMR bez sojine melase. Korištenje sojine melase u TMR-u za krave u laktaciji statistički je značajno (P˂0,05) utjecalo na povećanje prinosa 4 % MKM (5,03 %). Razlike u prosječnom udjelu i prinosu mliječne masti između tretmana nisu bile statistički značajne. Korištenje sojine melase statistički značajno (P˂0,01) povećava udjel (3,45 vs 3,32 %) i prinos (sa 0,81 na 0,88 kg/dan) proteina mlijeka. Utvrđeno je poboljšanje iskorištavanja konzumirane suhe tvari obroka, energije i sirovog proteina za 4,60, 4,81 i 7,82 %. Nije bilo značajnog utjecaja uključivanja sojine melase u TMR na ruminalnu pH vrijednost, brojnost i strukturu protozoa, kao niti na njihovu pokretljivost. Sojina melasa imala je značajan pozitivan učinak (P˂0,01) na smanjenje koncentracije uree u krvi (5,45 vs 6,30 mmol/L), pri čemu nije bilo značajnih učinaka na koncentraciju glukoze, Ca i P u krvi. Rezultati ovog istraživanja ukazuju da se sojina melasa, kao izvor lako dostupne energije, može uspješno koristiti u obrocima krava u laktaciji