Effects of different starch sources on metabolic profile, production and fertility parameters in dairy cows

Abstract

The objective of the study was to determine the effect of replacing triticale (high rumen degradable starch) with maize grain (low rumen degradable starch) during the transition period and the first 120 days of lactation on metabolic and hormonal profile indices, milk production and fertility performance in cows. Forty-eight Holstein-Friesian dairy cows were divided into 4 groups: TT (2.5 kg triticale grain/cow per day supplemented from 14 days prepartum to day 120 postpartum), TM (2.5 kg triticale grain/cow per day supplemented from day 14 before parturition to calving, and then 2.5 kg maize grain to 120 days of lactation), MT (2.5 kg maize grain/cow per day supplemented from day 14 before parturition to calving, and then 2.5 kg triticale grain to 120 days of lactation), MM (2.5 kg maize grain/cow per day supplemented from 14 days prepartum to day 120 postpartum). Blood samples were collected 3 weeks and 1 week before calving and on days 14, 56 and 70 of lactation, and they were analyzed in terms of concentrations of glucose, insulin, leptin, insulin-like growth factor I, nonesterified fatty acids, triglycerides, cholesterol, blood urea nitrogen and activities of aspartate aminotransferase and gamma glutamyl transpeptidase. Milk samples were collected twice a day at weekly intervals and analyzed for fat, protein and lactose. Milk yield and individual dry mater intake were recorded at weekly intervals. Body condition was estimated 3 weeks before calving, on parturition day and on days 14, 56 and 120 of lactation.Replacing triticale grain with maize grain in the transition period and during lactation positively affected fertility of lactating cows. An increased first service conception rate and shortening of the days open period was observed in MM and TM groups in comparison to those found in group MT (P ≤ 0.05). The lowest number of services per conception was recorded in groups MM and TM (P ≤ 0.05). Although the impact of milk production and the most of the blood indices were not significantly affected by this treatment, the results of the study suggest that maize grain in the transition period and lactation might be a more effective energy source for dairy cows than triticale grain.

Changes in metabolic and hormonal profiles during transition period in dairy cattle – the role of spexin

“…Serum cholesterol, triglyceride, glucose and β-hydroxybutyrate acid (BHBA) levels were determined using colorimetric assay kits (Pointe Scientific, USA) [ 56 ]. The levels of nonesterified fatty acids were calculated using the Wako kit (Wako Chemicals, USA).…”

Design and Implementation of the Array Logging Tool on Horizontal Production Logging

“…As shown in Figure 3, probe 1, 3, 5, 7, 9, and 11 are 6 water holding capacity measuring apparatus at the same cross section, and probe 2, 4, 6, 8, 10, and 12 are another 6 water holding capacity measuring apparatus at another same cross section [20]. As all these 12 probes are designed like this, the diameter of the instrument after contraction is reduced and contributes to the instrument carrying out survey work in wellbore [21].…”

Comparison Between the Effects of Feeding Corn Silage or Berseem as a Basal Diet On: 2-Digestion Coefficients, Feed Intake, Some Blood Parameters and Some Rumen Parameters of Lactating Friesian Cows

“…The highest concentrations of glucose, insulin, lipten, and blood triglycerides as well as the lowest NEFA level observed from day 7 before calving to day 14 of lactation and the lowest condition losses during the transition period could confirm the positive influence of starch on energy balance. The concentrations of blood urea nitrogen (BUN) reflect the diet energy and nitrogen balance for rumen microorganisms to protein synthesis (Mikula et al, 2011). Depeters and Ferguson (1992), claimed that BUN concentrations is reduced with an increase in the amount of rapidly fermenting NFC in feed ration.…”