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How much protein could ruminants produce without crops?: Difference between revisions
How much protein could ruminants produce without crops? (view source)
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(Created page with "'''Explore this scenario:''' Suppose that nobody uses any crops as animal feed. Not even crop residues{{x|because those could be used for growing mushrooms instead}}. But that farmers still raise cows/sheep/goats on pasture. Fewer of them, overall{{x|the lower populations can be achieved gradually by farmers choosing to not breeding as many. No need to envision a massive culling}}. How much animal protein (from meat & milk) could this produce?...") |
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{{ | {{answer|[[User:Elie|Elie]] ([[User talk:Elie|talk]]) 14:12, 15 November 2024 (EST)| | ||
{{b|#FF0|'''7.2 grams'''}} of protein per day, per capita, worldwide, '''in total''' from both meat and milk combined, from all ruminants {{light|(cows, sheep, goats, buffalo, etc)}}. | |||
{{dp | |||
|pasture | |||
|2.8 billion tonnes/year | |||
|Dry mass of all grass & leaves, grazed from all pasture land | |||
|Source: | |||
<br />Breewood, H. & Garnett, T. (2020). What is feed-food competition? (Foodsource: building blocks). Food Climate Research Network, University of Oxford. | |||
<br />Page 10 | |||
<br />References primary source: | |||
<br />Mottet, A., de Haan, C., Falcucci, A., Tempio, G., Opio, C., & Gerber, P. (2017). Livestock: On our plates or eating at our table? A new analysis of the feed/food debate. Global Food Security. | |||
}} | |||
{{dp | |||
|conversion_ratio | |||
|1 / 133 | |||
|Ruminants produce 1 gram of human-edible protein for every 133 grams of dry matter they eat. | |||
|Dry matter includes all materials eaten by ruminants (both human-edible and human-inedible). | |||
<br />Source: | |||
<br />Mottet, A., de Haan, C., Falcucci, A., Tempio, G., Opio, C., & Gerber, P. (2017). Livestock: On our plates or eating at our table? A new analysis of the feed/food debate. Global Food Security. | |||
<br />The number is mentioned in the Abstract: https://www.tabledebates.org/research-library/livestock-our-plates-or-eating-our-table | |||
}} | |||
{{dp | |||
|world.population | |||
|8 billion | |||
}} | |||
{{calc | |||
|pasture * conversion_ratio / world.population | |||
|g/day per capita | |||
|||Note: Ways this result could vary slightly: {{x|{{pbr}}~ Feed conversion ratios might be lower without corn grain - in which case, the result would be lower.{{pbr}}~ But if farmers focused more on milk than meat, they might be able to get the feed conversion ratios up a bit.}} | |||
}} | |||
For comparison: The '''status quo''' is 16 grams of protein: 10g protein from 297mL of whole milk; 6g protein from 30g of meats. {{light|''See [[Code:food2.sql]] for details of how this was calculated.''}} | |||
}} | |||
==More== | ==More== | ||
<comments /> | <comments /> | ||