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
  • Low transfer of cadmium, lead and aflatoxin B1 to eggs and meat of laying hens receiving diets with black soldier fly larvae reared on contaminated substrates
    Item type: Journal Article
    Heuel, M.; Kreuzer, M.; Gangnat, I.D.M.; et al. (2023)
    Animal Feed Science and Technology
    Replacing soybeans with insects in egg and poultry meat production could improve environmental sustainability. Black soldier fly larvae (BSFL) have a favorable nutrient composition and can be reared on low-grade waste, but this is associated with the risk of feed and food contamination. The aim of this study was to assess the transfer of selected contaminants from larval substrates to poultry-derived food. Two different control substrates were used. Substrate CCH (produced in Switzerland) was based on side streams approved for insect rearing in the European Union (EU), while substrate CIND (produced in Indonesia) included non-EU approved waste. In addition, substrate CIND was spiked with either heavy metals (HM; 1.9 mg cadmium and 18.8 mg lead/kg dry matter (DM)) or 1.5 mg aflatoxin B1/kg DM (AF)). The larvae fed HM contained 7 mg cadmium and 16 mg lead/kg DM. These values were about 30 times the concentrations of cadmium and 30–60 times the concentrations of lead found on average in the BSFL reared with the two non-spiked substrates. Although substrate AF contained 842 μg aflatoxin B1/kg DM as analysed, the AF larvae contained only 4 μg aflatoxin B1/kg DM. Larval meals were integrated at 200 g/kg in two control diets (diets CCH and CIND) and two diets based on contaminated BSFL (diets HM and AF) designed for late-laying hens (n = 9/treatment). After feeding these diets for 4 weeks, the hens were slaughtered. Diet HM and AF did not affect laying performance or egg quality compared with the control diets. In the body tissue, the cadmium concentrations (per kg DM) were nearly doubled by diet HM in the breast meat (13.3 μg), kidneys (12.3 mg) and liver (1.86 mg) compared to diet CIND. The same diet increased lead in kidneys from below 0.1 to 0.5 mg/kg DM. No lead was detected in the meat and eggs, and no cadmium was found in the eggs. In conclusion, despite cadmium and lead also occurring in BSFL meals of CCH and CIND, the levels in all corresponding hen-based feed and food materials were below the maximum content, except for the kidneys. The aflatoxin B1 level of diet AF (1 μg/kg DM) suggests that the risk might also be small when BSFL are reared on moldy substrate containing aflatoxin-producing fungi. In conclusion, postconsumer waste apparently poses a lower risk than expected in poultry food chains for these contaminants when used as larval substrate.
  • 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