Relationship between energy status and fertility in Czech Fleckvieh cows

Abstract

DUCHÁČEK, J., VACEK, M., STÁDNÍK, L., BERAN, J., VODKOVÁ, Z., ROHLÍKOVÁ, V. NEJDLOVÁ, M.: Relationship between energy status and fertility in Czech Fleckvieh cows. Acta univ. agric. et silvic. Mendel. Brun., 2012, LX, No. 6, pp. 67-74 The aim of this study was to confi rm that a negative energy balance expressed by declining body condition score (BCS) can lead to the deterioration of fertility results of Czech Fleckvieh cows. The BCS of cows was evaluated before calving and during the fi rst fi ve weeks of lactation. The evaluation was based on 338 Czech Fleckvieh cows calved between the October 13th, 2009 and April 27th, 2010 at one dairy farm. Analysis of relationships between the energy balance results and fertility score expressed by the reproduction results (pregnancy rate a er the fi rst and all inseminations, the insemination interval, service period, insemination index, calving period) of the observed group were performed. The higher body condition score of the Czech Fleckvieh cows before calving turned out advantageously regarding the energy source during the postpartal period. No negative eff ect of higher BCS in cows before calving was confi rmed. The best reproduction parameters were attained in the group of cows with no change or marked increase of body condition a er calving recorded. However, statistically signifi cant diff erences between the groups were detected only in the third week of lactation. Signifi cant diff erences in the level of body condition were detected in relation to the length and type of oestrus onset.reproduction, negative energy balance, body condition score, Czech Fleckvieh Negative energy balance (NEB) is the main cause of fertility decline in early lactating dairy cows. It results in an increasing in the calving interval length and a decrease in dairy herd profi tability (Wathes et al., 2007;Rossi et al., 2008). Energy defi ciency causes extension of the interval from parturition to recovery of ovarian cyclicity and activity of corpus luteum (Banos et al., 2004;Patton et al., 2007). A low pregnancy rate was observed in dairy cows with severe BCS loss (> 10 % of live weight) during early lactation, or in cows losing weight from calving to fertilization by more than 1% weekly (McClure, 1994). Anestrus occurrence a er parturition tends to be more expressive in high-yielding cows, which calve with a low BCS status and a loss of 0.75 -1 BCS points (Moreira et al., 2000, Vacek andStádník, 2007). BCS status decline in the fi rst month postpartum is associated with impaired conceiving (Pryce et al., 2001). However, other authors did not fi nd any signifi cant relationship between BCS losses and fertility performance (Waltner et al., 1993;Ruegg and Milton, 1995). Also, dependencies observed in dairy breeds were not conclusively confi rmed in dual purpose breeds (Jílek et al., 2008). Most of the investigations assessing the relationships between BCS status and BCS changes, recovery of ovarian cyclicity and fertility performances of dairy cows in detail, were related only...

Associations between milk production level, calving interval length, lactation curve parameters and economic results in Holstein cows

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Analyse of Relationships Between Some Milk Indicators of Cow Energy Metabolism and Ketosis State

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Modelación de la curva de lactación en vacas Holstein de un establo en el valle de Huaura, Perú

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