Animal production for efficient phosphate utilization: from optimized feed to high efficiency livestock

Kebreab, E.; Hansen, A. V.; Strathe, A. B.

doi:10.1016/j.copbio.2012.06.001

Cited by 60 publications

(32 citation statements)

References 45 publications

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“…For this study, P emissions were modeled on the basis of Nielsen et al (2007). Furthermore, P reserves are finite; hence, losses not only cause environmental damage but also waste a depleting resource (Kebreab et al, 2012).…”

Section: Description Of Processesmentioning

confidence: 99%

“…Similarly, a considerable amount of P in pig and poultry diets is unavailable to the animal (Kebreab et al, 2012). Reducing intake of protein and P is the most effective way to reduce environmental impacts; however, this has to be achieved without impairing animal performance or negative environmental impact.…”

Section: Introductionmentioning

confidence: 99%

“…Utilization of supplemental AA to meet protein requirements can reduce N excretion by 8% for every 1% unit reduction in dietary protein intake (Kerr 2003;NRC, 2012). The supplementation of animal feed with the enzyme phytase improves the availability and digestibility of organically bound plant P, leading to reduced use of inorganic P in feed formulation and subsequent decrease in P excretion (Kebreab et al, 2012). The production of specialty feed ingredients (sFi) such as supplemental AA and phytase also has an environmental footprint.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Environmental impact of using specialty feed ingredients in swine and poultry production: A life cycle assessment1

Kebreab

Liedke²,

Caro

et al. 2016

Journal of Animal Science

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Livestock production has a variety of environmental impacts such as greenhouse gas emissions, water pollution, acidification, and primary energy consumption. The demand for livestock products is expected to grow substantially, creating even more environmental pressure. The use of specialty feed ingredients (SFI) such as supplemented AA and phytase can reduce nutrient input into the system without compromising productivity and consequently can reduce emissions. The global change impact of using SFI in pig and broiler production systems in Europe and North and South America was studied. A life cycle assessment according to international standards (ISO 14040/44) analyzed contributions from producing SFI and animals to global change. Three different alternatives were analyzed. In addition, partial sensitivity analysis was conducted using 5 scenarios for each region for both production systems. Specialty feed ingredient supplementation in pig and broiler diets reduced greenhouse gas emissions (cradle to farm gate) by 56% and 54% in Europe, 17% and 15% in North America, and 33% and 19% in South America, respectively, compared to an unsupplemented diet. A total of 136 Mt CO 2 equivalent (CO 2 eq) was saved in 2012, rising to 146 Mt CO 2 eq in 2050 on the basis of United Nations population projections. Considerable benefits of supplementation with SFI were apparent in European and South American diets when direct land use change was considered because of the reduced demand for soybean meal. The eutrophication potential of unsupplemented diets was reduced by up to 35% in pig and 49% in broiler production systems compared to supplemented alternatives. The acidification potential of supplemented strategies was reduced by up to 30% in pig and 79% in broiler production systems. The primary energy demand was similar in all alternatives, and this could be an area where the SFI industry can improve. Overall, SFI supplementation substantially reduced the global warming, eutrophication, and acidification potentials in all regions studied.

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Section: Description Of Processesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Environmental impact of using specialty feed ingredients in swine and poultry production: A life cycle assessment1

Kebreab

Liedke²,

Caro

et al. 2016

Journal of Animal Science

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“…In particular, high amount of phosphorus promotes algae growth in water, since it is usually regulated by microorganisms, which in its turn decreases oxygen concentration and leads to eutrophication (extraordinary growth of algae as a result of excess nutrients in water bodies) on rivers, lakes, and seas worldwide [5,6]. Due to phosphorus is a non-renewable element and huge amount of phosphorus is lost annually for lack of phosphorus recovery, its recycling is of great interest especially with increasing demands, such as in the agriculture [7] as a fertilizer [8,9] or industrial usages as ingredients for human food, pharmaceuticals, detergents, and food additive in the animal feed [10,11]. Therefore, phosphorus is a critical element in water, where it was found frequently contained in groundwater, domestic and industrial wastewaters.…”

Section: Introductionmentioning

confidence: 99%

Phosphate removal and recovery from water using nanocomposite of immobilized magnetite nanoparticles on cationic polymer

Markeb

Alonso

Dorado

et al. 2016

Environmental Technology

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Highlights• Immobilization of magnetite nanoparticles on cationic polymer was synthesized.• Phosphate removal using magnetite based nanocomposites was tested.• Adsorption isotherms of phosphate at two pH; 5 and 7 were performed.• Different isotherms models were applied for experimental data fitting.• Regeneration and reusability of the magnetite based nanocomposites were carried out. Graphical Abstract 2 AbstractA novel nanocomposite based on magnetite nanoparticles (Fe3O4-NPs) immobilized on the surface of the cationic exchange polymer, C100, using a modification of the coprecipitation method was developed to obtain magnetic nanocomposites (NCs) for phosphate removal and recovery from water. High resolution TEM-EDS, SEM, XRD, and ICP-OES were used to characterize the NCs. The continuous adsorption process by the so-called breakthrough curves was used to determine the adsorption capacity of the Fe3O4 based NC. The adsorption 3 capacity conditions were studied under different conditions (pH, phosphate concentration and concentration of NPs). The optimum concentration of iron in the NC for phosphate removal was 23.59 mgFe/gNC. The sorption isotherms of this material were performed at pHs 5 and 7.Taking into account the real application of this novel material in real water, the experiments were performed at pH 7, achieving an adsorption capacity higher than 4.9 mgPO4-P/gNC.Moreover, Freundlich, Langmuir and a combination of them fit the experimental data and were used for interpreting the influence of pH on the sorption and the adsorption mechanism for this novel material. Furthermore, regeneration and reusability of the nanocomposite were tested obtaining 97.5 % recovery of phosphate for the first cycle and at least 7 cycles of adsorptiondesorption were carried out with more than 40% of recovery. Thus, this work described a novel magnetic nanoadsorbent with promoting properties for phosphate recovery in wastewater.

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“…Feed management practices that reduce P excretion in cattle can be broadly divided in to two categories: (1) improving or optimizing P availability in feed and (2) increasing efficiency of livestock through increased P incorporation in product or faster growth (Kebreab et al, 2012). Reduced overfeeding by matching animal P requirement with available P in the diet, ration formulation methods, feeding animals in groups according to their physiological state, and grazing management will be discussed in detail.…”

Section: Management Practices To Reduce Phosphorus Excretionmentioning

confidence: 99%

Feed management practices to reduce manure phosphorus excretion in dairy cattle

Kebreab

Hansen

Leytem³

2013

Advances in Animal Biosciences

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Phosphorus (P) is an essential mineral that needs to be supplied in sufficient quantities for maintenance and growth and milk production in dairy cattle. However, over 60% of the P consumed can be excreted in faeces with a potential to cause environmental pollution. Concern over higher levels of P in intensively managed livestock systems has led to legislation such as the Water Framework Directive in the European Union. In this manuscript, several methods of reducing P pollution are discussed. A major source of environmental P pollution has been overfeeding P mainly due to addition of 'safety margin' over the animal's requirement and concerns related to fertility. Matching the animal's requirement and feeding in groups so that animals at the same physiological status are fed according to their requirement has a potential to reduce P excretion significantly. P can also be reduced by matching available P with the metabolizable energy content of the diet because more P can be incorporated into milk when P is utilized by rumen microbes, which are limited by energy. Plants contain phytate bound P that need to be broken up before they can be absorbed by the animal. Although ruminants can digest phytate, use of phytase enzyme could help either directly by acting on phytate P or improvement of feed digestibility. Pasture management can lead to improved nutrient cycling, particularly if the soil is deficient in P. However, overfertilizing pasture could result is higher runoff of dissolved reactive P. Management practices that leave adequate forage residue on the surface such as rotational grazing will improve infiltration and decrease runoff, reducing nutrient losses.

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Animal production for efficient phosphate utilization: from optimized feed to high efficiency livestock

Cited by 60 publications

References 45 publications

Environmental impact of using specialty feed ingredients in swine and poultry production: A life cycle assessment1

Environmental impact of using specialty feed ingredients in swine and poultry production: A life cycle assessment1

Phosphate removal and recovery from water using nanocomposite of immobilized magnetite nanoparticles on cationic polymer

Feed management practices to reduce manure phosphorus excretion in dairy cattle

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