Journal article Closed Access

Seaweed supplementation to mitigate methane (CH4) emissions by cattle (SeaCH4NGE)

Pétursdóttir, Ásta H.; Gunnlaugsdóttir, Helga; Desnica, Natasa; Ólafsdóttir, Aðalheiður; Kuenzel, Susanne; Rodehutscord, Markus; Reynolds, Chris; Humphries, David; Draper, James

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    <dct:title>Seaweed supplementation to mitigate methane (CH4) emissions by cattle (SeaCH4NGE)</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2023</dct:issued>
    <dcat:keyword>seaweed</dcat:keyword>
    <dcat:keyword>feed</dcat:keyword>
    <dcat:keyword>algae</dcat:keyword>
    <dcat:keyword>macroalgae</dcat:keyword>
    <dcat:keyword>macrominerals</dcat:keyword>
    <dcat:keyword>bromoform</dcat:keyword>
    <dcat:keyword>methane</dcat:keyword>
    <dcat:keyword>climate change</dcat:keyword>
    <dcat:keyword>trace elements</dcat:keyword>
    <dcat:keyword>iodine</dcat:keyword>
    <dcat:keyword>cattle</dcat:keyword>
    <dcat:keyword>cows</dcat:keyword>
    <dcat:keyword>quality</dcat:keyword>
    <dcat:keyword>safety</dcat:keyword>
    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2023-12-31</dct:issued>
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    <dct:description>&lt;p&gt;The results of SeaCH4NGE include a detailed analysis of the chemical composition of seaweeds, including heavy metals and nutritional composition. This elucidated that iodine was the main concern prior to feeding trials. Chemical analysis of the compounds that may be responsible for methane reduction showed that for the seaweeds investigated the reduction seen in-vitro was likely due to compounds called phlorotannins rather than bromoform.&amp;nbsp;&lt;/p&gt; &lt;p&gt;The in-vitro screening of the seaweeds showed a some reduction of methane, but the reduction was seaweed species dependent. The reduction was dose dependent, i.e. higher amount of seaweed inclusion resulted in larger methane reduction in-vitro. The same two seaweed species were used for a Rusitec experiment (in-vitro) which is a very comprehensive analysis which provides additional information. The in-vivo trial carried out showed that feeding A. nodosum and Fucus vesiculosus to cattle has a relatively small effect on methane emission or yield. However, phlorotannins are known to have other beneficial effects when consumed by ruminants.&amp;nbsp;&lt;/p&gt; &lt;p&gt;The report further contains responses from a questionnaire to UK cattle farmers regarding their stance on seaweed supplementation and environmental matters.&lt;/p&gt; &lt;p&gt;This report is closed until 31.12.2023.&lt;br&gt; ____&lt;/p&gt; &lt;p&gt;Ni&amp;eth;urst&amp;ouml;&amp;eth;ur SeaCH4NGE fela &amp;iacute; s&amp;eacute;r &amp;iacute;tarlega greiningu &amp;aacute; efnasamsetningu &amp;thorn;angs, &amp;thorn;.m.t &amp;thorn;ungm&amp;aacute;lma og n&amp;aelig;ringarsamsetningu. Jo&amp;eth; styrkur reyndist helsti takmarkandi &amp;thorn;&amp;aacute;ttur var&amp;eth;andi &amp;thorn;ang sem f&amp;oacute;&amp;eth;urb&amp;aelig;ti. L&amp;iacute;klegt er a&amp;eth; s&amp;uacute; metan minnkun sem s&amp;aacute;st me&amp;eth; tilraunum &amp;aacute; metanframlei&amp;eth;slu &amp;aacute; ranns&amp;oacute;knarstofu (in vitro) v&amp;aelig;ri vegna efnasambanda sem kallast fl&amp;oacute;r&amp;oacute;tann&amp;iacute;n frekar en br&amp;oacute;m&amp;oacute;forms sem er &amp;thorn;ekkt efni sem getur minnka&amp;eth; metanframlei&amp;eth;slu j&amp;oacute;rturd&amp;yacute;ra. In vitro skimun &amp;thorn;angsins s&amp;yacute;ndi h&amp;oacute;flega minnkun metans, en l&amp;aelig;gri metanframlei&amp;eth;sla var h&amp;aacute;&amp;eth; &amp;thorn;angtegundum. L&amp;aelig;kkunin var skammtah&amp;aacute;&amp;eth;, &amp;thorn;.e.a.s. me&amp;eth; &amp;thorn;v&amp;iacute; a&amp;eth; nota meira magn af &amp;thorn;angi m&amp;aacute;tti sj&amp;aacute; meiri metan minnkun in vitro. S&amp;ouml;mu tv&amp;aelig;r &amp;thorn;angtegundirnar voru nota&amp;eth;ar vi&amp;eth; Rusitec tilraun (in vitro) sem er mj&amp;ouml;g yfirgripsmikil greining sem veitir frekari uppl&amp;yacute;singar. In-vivo ranns&amp;oacute;kn &amp;aacute; k&amp;uacute;m s&amp;yacute;ndi a&amp;eth; f&amp;oacute;&amp;eth;run nautgripa me&amp;eth; A. nodosum og Fucus vesiculosus hefur tilt&amp;ouml;lulega l&amp;iacute;til &amp;aacute;hrif &amp;aacute; losun metans. Hins vegar er vita&amp;eth; a&amp;eth; fl&amp;oacute;r&amp;oacute;tann&amp;iacute;n hafa &amp;ouml;nnur j&amp;aacute;kv&amp;aelig;&amp;eth; &amp;aacute;hrif &amp;thorn;egar &amp;thorn;au eru neytt af j&amp;oacute;rturd&amp;yacute;rum.&amp;nbsp;&lt;/p&gt; &lt;p&gt;Sk&amp;yacute;rslan inniheldur einnig k&amp;ouml;nnun sem var ger&amp;eth; &amp;aacute; vi&amp;eth;horfi breskra k&amp;uacute;ab&amp;aelig;nda til &amp;thorn;&amp;ouml;rungagjafar og loftslagsm&amp;aacute;la.&lt;/p&gt; &lt;p&gt;&amp;THORN;essari sk&amp;yacute;rsla er loka&amp;eth; til 31.12.2023.&lt;/p&gt;</dct:description>
    <dct:description>Funding: EIT Food</dct:description>
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Publication date:
December 31, 2023
DOI:
10.5281/zenodo.5521531

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Keyword(s):
seaweed feed algae macroalgae macrominerals bromoform methane climate change trace elements iodine cattle cows quality safety

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