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Landbouweekblad (Digital)

Landbouweekblad (Digital)

1 Issue, 23 January 2025

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Herkouers: Van ‘ondiere’ tot oplossings

Nadat herkouers op plase lank as slaanstok gebruik is in die debat oor metaangasvrystellings en plase se ‘reuse-aandeel’ in klimaatsverandering, skuif die klem nou danksy ’n meer oorwoë koolstofsom. ’n Plaas is doodeenvoudig nie ’n fabriek nie, maar almal besef dit nog nie.
Herkouers: Van ‘ondiere’ tot oplossings
Herkouers is grasvretende herbivore wat die voedingstowwe vir hul voortbestaan uit plantgebaseerde kos kry. Hulle doen dit onder meer deur voer voor vertering in ’n aangepaste maag te laat fermenteer. Dié fermentasieproses word hoofsaaklik deur mikrobes uitgevoer. Weens hul unieke spysverteringstelsel verskil die spysverteringsproses van herkouers grootliks van dié van mense of omnivore soos honde (sien die TABEL). Weens hul spysverteringstelsel stel herkouers groot hoeveelhede metaan (CH4) mondelings vry. CH4 is ’n kweekhuisgas wat verband hou met aardverwarming. Die vrystelling daarvan (ook genoem enteriese fermentasie), is verantwoordelik vir 80% tot 90% van alle kweekhuisgasvrystellings wat met herkouers geassosieer word. Enteriese fermentasie is die hoofpunt in die debat wat aanvoer dat herkouende plaasdiere, veral skape en beeste, skadelik vir die klimaat en die omgewing in die algemeen is. Daar word dus…
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Landbouweekblad (Digital) - 1 Issue, 23 January 2025

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