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Phytogenics improved colostrum quality when fed to close-up cows.

E. Schwandt

Events

06-23-2020

Abstract:

282
Phytogenics improved colostrum quality when fed to close-up cows.
E. Schwandt*1, P. Gott1, A. Tacconi2, R. Murugesan1, S. Ramirez1. 1BIOMIN America Inc Overland Park, KS, 2BIOMIN Holding GmbH Getzersdorf, Lower Austria, Austria.

The anti-inflammatory properties of phytogenics may aid in diverting energy and nutrients toward productive biological processes, such as producing colostrum, by keeping the immune response homeostatic. The study objective was to determine the effect of a phytogenic feed additive, Digestarom Dairy (DD; BIOMIN America, Overland Park, KS) on colostrum quality when fed to close-up cows. One commercial close-up pen was utilized where cows entered this pen approximately 30 d before their calving date. A total of 641 cows received a control diet (CON) and 524 cows received a diet containing 2 g/h/d DD over 2 replicate periods per treatment group. Lactation groups were categorized as 2, 3, and 4+. Colostrum (kg) was collected, weighed, and Brix (%) measured via refractometer. Colostrum and Brix were analyzed via GLIMMIX procedure of SAS with a covariate of replicate and a random factor of cow; LSMeans represent treatment estimates within lactation. Brix was categorized as > 21% and ≤ 21% to represent higher quality colostrum (HIGH) and lower quality colostrum (LOW), respectively. The distribution of HIGH and LOW within CON and DD for each lactation and overall lactations were analyzed via Chi-squared test in the FREQ procedure. Colostrum was reduced (P < 0.05) in lactation 2, 3, and 4+ groups fed DD compared with CON by 0.45, 0.18, and 0.32 kg, respectively. However, Brix was increased (P < 0.05) in lactation 2, 3, and 4+ groups fed DD compared with CON by 1.5, 1.7, 0.7% points, respectively. Averaged over lactation groups, DD reduced (P < 0.05) colostrum by 0.32 kg and increased (P < 0.05) Brix by 1.4% points compared with CON. The distribution of HIGH colostrum tended (P < 0.10) to increase in lactation 2 and 3 groups fed DD compared with CON, but did not differ in distribution between treatments for lactation 4+ group. However, averaged over lactation groups, the distribution of HIGH and LOW quality colostrum was significantly (P < 0.05) different between treatments, where DD had greater HIGH colostrum cows (32.8%) compared with CON cows (26.6%). In conclusion, DD reduced total colostrum produced, but increased colostrum quality as measured by Brix.

Keywords: colostrum, phytogenics, Brix.