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This study tested the hypothesis that purebred Boran (Bos indicus) cows and crossbreds of Boran and Holstein respond differently to long-term changes of feeding level in nutrient partitioning to milk and body fat stores. A total of 27 cows of these two genotypes were subjected either to a low or ...


Jenet, A.Fernández Rivera, S.Tegegne, AzageWettstein, H.R.Senn, M.Saurer, M.Langhans, W.Kreuzer, M.[Evidence for different nutrient partitioning in Boran (Bos indicus) and Boran x Holstein cows when re-allocated from low to high or from high to low feeding level]Evidence for different nutrient partitioning in Boran (Bos indicus) and Boran x Holstein cows when re-allocated from low to high or from high to low feeding level

Study was conducted to determine turnover of water, nitrogen and energy in lactating Holstein x Boran cows. Nine cows (Bos indicus × B. taurus) between their 42nd and 420th the days of lactation were selected for this study. The crossbred cows had ad libitum access to water and a dried maize stov...


Jenet, A.Yimegnuhal, A.Tegegne, AzageFernández Rivera, S.Kreuzer, M.[Water intake and nutrient balances of Holstein X Boran cows fed a low-quality tropical diet]Water intake and nutrient balances of Holstein X Boran cows fed a low-quality tropical diet

Insufficient feed supply is a major limiting factor for milk production in the tropics. The aim of this study was to assess the effects of feeding level on live-weight and performance of Zebu (Boran) and crossbred (Boran × Holstein, 50–75% Holstein) lactating cows. Twenty-four heifers of each bre...


Jenet, A.Tegegne, AzageOsuji, P.O.Yimegnuhal, A.Kreuzer, M.McCrabb, G.J.Fernández Rivera, S.[Lifetime under-nutrition and lactation performance of Zebu and Zebu x Holstein cows in the tropics]Lifetime under-nutrition and lactation performance of Zebu and Zebu x Holstein cows in the tropics

Jenet, A.Yimegnuhal, A.Fernández Rivera, S.Tegegne, AzageOsuji, P.O.McCrabb, G.J.Wettstein, H.R.Kreuzer, M.[Genotype differences in the long-term response to different levels of energy supply of dairy cows kept under tropical conditions]Genotype differences in the long-term response to different levels of energy supply of dairy cows kept under tropical conditions

Forty-eight heifers of two genotypes, Boran (Bos indicus) and Holstein×Boran, were allocated to three feeding levels equivalent to 1.0, 1.2 and 1.4 times calculated metabolisable energy requirements for maintenance (MEm). The experiment started at the onset of reproductive activity, when the Bora...


Jenet, A.Fernández Rivera, S.Tegegne, AzageYimegnuhal, A.Osuji, P.O.Kreuzer, M.[Growth and feed conversion of Boran (Bos indicus) and Holstein X Boran heifers during three physiological states receiving different levels of a tropical diet]Growth and feed conversion of Boran (Bos indicus) and Holstein X Boran heifers during three physiological states receiving different levels of a tropical diet
Jenet, A.Tegegne, AzageOsuji, P.O.Yimegnuhal, A.Kreuzer, M.McCrabb, G.J.Fernández Rivera, S.[Milk performance of lifetime underfed cows of different genotype (Zebu or Zebu x Friesian) in the tropics]Milk performance of lifetime underfed cows of different genotype (Zebu or Zebu x Friesian) in the tropics

Six adult African-type hair sheep (BW = 40.3 +/- 6.3 kg) fitted with ruminal and duodenal cannulas were subjected to four treatments. Sheep were offered basal diets at a rate of 80 g of DM/kg of metabolic BW (equivalent to ad libitum access) consisting either of a low-quality grass hay (Brachiari...


Abreu, A.Carulla, Juan E.Lascano, Carlos E.Díaz, T.E.Kreuzer, M.Hess, HD[Effects of Sapindus saponaria fruits on ruminal fermentation and duodenal nitrogen flow of sheep fed a tropical grass diet with and without legume]Effects of Sapindus saponaria fruits on ruminal fermentation and duodenal nitrogen flow of sheep fed a tropical grass diet with and without legume

Extensive comparisons of the effects of tropical shrub legumes rich in condensed tannins (CT) require well-conserved material. It is, however, unclear if the application of even gentle methods like freeze drying (lyophilization) affects the results in comparison to fresh material. Therefore, an e...


Tiemann, Tassilo T.Avila Vargas, PLascano, Carlos E.Kreuzer, M.Hess, HD[Effect of freeze drying on in vitro ruminal fermentation dynamics of three tropical shrub legumes with and without condensed tannins]Effect of freeze drying on in vitro ruminal fermentation dynamics of three tropical shrub legumes with and without condensed tannins
Tiemann, Tassilo T.Kreuzer, M.Lascano, Carlos E.Hess, HD[Cultivation site dependent variations of forage yield and quality of tropical shrub legumes]Cultivation site dependent variations of forage yield and quality of tropical shrub legumes
Bartl, K.Gómez, C.A.Hess, HDMayer, ACKreuzer, M.Holmann, Federico J.[Costs and benefits of traditional and improved dry season feeding systems of dairy cattle for smallholder farmers in the Peruvian Andes]Costs and benefits of traditional and improved dry season feeding systems of dairy cattle for smallholder farmers in the Peruvian Andes

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