Journal: Animal Feed Science and Technology

Abbreviation

Anim. Feed Sci. Technol.

Publisher

Elsevier

Journal Volumes

ISSN

0377-8401
1873-2216

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Publications 1 - 10 of 35
  • Nutrient composition and in vitro ruminal fermentation of tropical legume mixtures with contrasting tannin contents
    Item type: Journal Article
    Stürm, C. D.; Tiemann, Tassilo T.; Lascano, Carlos E.; et al. (2007)
    Animal Feed Science and Technology
  • Efficacy of plant extracts rich in secondary constituents to modify rumen fermentation
    Item type: Journal Article
    Śliwiński, B.J.; Soliva, Carla R.; Machmüller, Andrea; et al. (2002)
    Animal Feed Science and Technology
  • Methane emission, nitrogen and energy utilisation of beef cattle when replacing or omitting soybean meal in a forage-based diet
    Item type: Journal Article
    Keller, Magdalena; Kreuzer, Michael; Reidy, Beat; et al. (2022)
    Animal Feed Science and Technology
    Replacing imported soybean meal (SBM) by domestic protein sources such as grain legumes, food industry by-products or novel resource-efficient feeds is a current research focus to enhance the sustainability of ruminant production systems. In addition, grass silage replacing maize silage can contribute to dietary crude protein (CP) supply as well and complies with the natural diet of ruminants. An experiment with 30 Limousin-sired beef bulls was performed with diets in which SBM was replaced by alternative protein sources when feeding a diet composed of, per kg dry matter (DM), 500 g grass silage, 300 g maize silage and 200 g concentrate. In the concentrate, SBM (control diet) was replaced by faba beans, pumpkin seed cake, or spirulina (Arthrospira platensis) to result on average in 226 g CP/kg concentrate dry matter (DM). A fifth group served as negative control, which received a grain-based concentrate with only 135 g CP/kg DM. Bulls were fed the experimental diets for the entire fattening period starting from an initial body weight (BW) of 164 ± 2.3 kg and 4.3 ± 0.06 months of age. At an average body weight (BW) of 275 ± 5.6 kg and 7.4 ± 0.17 months of age, each animal underwent a 9-day sampling period to determine individual N and energy intake and excretion (7 days of urine and faeces collection) as well as methane emission (2 days in respiration chambers). The diet had no effect on DM and nutrient intake. Apparent fibre digestibility was significantly affected by diet, being numerically lowest with faba beans instead of SBM. Compared to the other groups, the bulls fed no additional protein had the lowest urinary N excretion (25.1 vs. 40.3 g/bull/day; 366 vs. 460 g/kg total faecal and urinary N). Digestive and metabolic energy utilisation were comparable among diets. Methane (CH4) production adjusted to body weight differed significantly among groups, being numerically highest in bulls fed faba beans (547 vs. 513 mg CH4/kg BW/day in the other diets). These results show that none of the tested protein sources, including SBM, was of benefit when feeding a diet containing 500 g/kg DM grass silage complemented with maize silage and concentrate. Feeding such a diet seems to provide an adequate supply with metabolisable protein. Omitting the common protein supplementation therefore mitigated urinary N losses and thus likely N emissions from the manure at unchanged N and energy utilisation.
  • Review of current in vivo measurement techniques for quantifying enteric methane emission from ruminants
    Item type: Review Article
    Hammond, Kirsty J.; Crompton, Les A.; Bannink, André; et al. (2016)
    Animal Feed Science and Technology
  • Design, implementation and interpretation of in vitro batch culture experiments to assess enteric methane mitigation in ruminants: A review
    Item type: Review Article
    Yáñez Ruiz, David R.; Bannink, André; Dijkstra, Jan; et al. (2016)
    Animal Feed Science and Technology
  • Increasing the proportion of hazel leaves in the diet of dairy cows reduced methane yield and excretion of nitrogen in volatile form, but not milk yield
    Item type: Journal Article
    Terranova, Melissa; Eggerschwiler, Lukas; Ortmann, Sylvia; et al. (2021)
    Animal Feed Science and Technology
    Various feeds for ruminants have been identified that help to mitigate the greenhouse gas methane. However, even when there has been success in suppressing absolute methane emissions, intake, digestibility, and performance often decline in parallel. Ideal dietary levels of effective feeds would reduce methane production without affecting performance-related variables. Such favorable associative effects have been demonstrated in vitro by combining a high-quality forage with plants rich in phenols. In the present study, the tannin-rich leaves of hazel (Corylus avellana) gradually replaced (from 0 to 820 g/kg) a high-quality forage (dried alfalfa) in 20 types of experimental pellets fed to 20 mid-to-late lactating cows. Additionally, the cows were fed a mixed basal ration and some concentrate. The proportion of hazel in the 20 complete diets ranged from 0 to 400 g/kg dry matter. After 14 days of adaptation, 8 days were used for intensive sampling of feces (including markers for determining digesta retention time), urine, and milk. In addition, cows stayed for 2 days in open-circuit respiration chambers. Hazel leaves reduced the feed intake only slightly. Digestibility declined and mean digesta retention time was prolonged with increasing hazel proportion, likely due to the lower feeding value of the hazel leaves compared to the alfalfa. As aimed for, there were no significant effects on energy-corrected milk yield, body energy, and body N retention with increasing hazel intake, even though methane emission clearly declined in absolute term and per unit of digestible organic matter and tended to decrease per unit of energy corrected milk. In addition, increasing hazel proportions strongly shifted N excretion from urinary N (which declined from about 300 to 100 g/kg N intake) to fecal N. This could also be anticipated from the sharp decline in milk urea concentration (from about 35 to 10 mg/dL). In conclusion, hazel leaves as a feed supplement for dairy cows showed a high palatability within 3 weeks of feeding in dairy cows and great potential to mitigate emissions of methane and nitrogen in volatile form at maintained production levels. No favorable associative dosage effects seem to exist when combining tannin-rich hazel leaves with the high-quality forage alfalfa in a different proportions to a mixed basal ration. However, the present study is one of the few, where it was possible to mitigate noxious emissions of dairy cows by feeding a tannin rich feed supplement without concomitant negative impact on the animal's performance.
  • Feeding value of whole and extracted Moringa oleifera leaves for ruminants and their effects on ruminal fermentation in vitro
    Item type: Journal Article
    Soliva C. R.; Kreuzer, M.; Foidl, N.; et al. (2005)
    Animal Feed Science and Technology
  • Milk fatty acid composition of dairy cows fed green whole-plant buckwheat, phacelia or chicory in their vegetative and reproductive stage
    Item type: Journal Article
    Kälber, Tasja; Kreuzer, Michael; Leiber, Florian (2014)
    Animal Feed Science and Technology
  • Blood hormonal and metabolite levels in grazing yak steers undergoing compensatory growth
    Item type: Journal Article
    Ding, Luming; Chen, J.Q.; Long, Ruijun; et al. (2015)
    Animal Feed Science and Technology
Publications 1 - 10 of 35