Win a copy of Permaculture Design Companion this week in the Permaculture Design forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • Anne Miller
  • paul wheaton
stewards:
  • Jocelyn Campbell
  • Mike Jay Haasl
  • Burra Maluca
garden masters:
  • James Freyr
  • Joylynn Hardesty
  • Steve Thorn
  • Greg Martin
gardeners:
  • Carla Burke
  • Dave Burton
  • Pearl Sutton

Rising CO2 levels reduce plant nutrition

 
Posts: 38
Location: Central Texas
6
trees cooking greening the desert
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
This is something I found out today reading an article on grass fed cows and how declining nutrition in prairie grasses threaten the livelihood of both the cows and the farms. So I dug a little deeper, and the first thing I found was this alarming article: https://www.politico.com/agenda/story/2017/09/13/food-nutrients-carbon-dioxide-000511.

It even links the declines in bee populations to reduced nutrition in wild plants. This is scary. As a holistic nutritionist, I'm shocked and despondent.
 
pollinator
Posts: 206
Location: Sask, Canada - Zone 3b
52
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
There has been some discussion about this topic already, but it's interesting enough to revisit.

https://permies.com/t/70557/nutrient-collapse
https://permies.com/t/70537/Potential-decrease-plant-nutrition-due

Having reread those topics just now, it seems the replies hint that the experiment has some flaws in it.

 
garden master
Posts: 2705
Location: West Tennessee
803
cat purity trees books chicken food preservation cooking building homestead
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I’ve read this article and I’m not buying it. I don’t believe one guy making one report makes anything true. To me, this guys research is being used to distract people from the real reason food crops have less nutrition, and two of those factors are poor soil conditions crops are grown in and selective over breeding of crops in which the goal of increased yields often results in less nutritional value.

This guy is a mathematician, not a biologist. People can find connections in data sampling which doesn’t necessarily mean they’re relevant. I could take data sampling on water, saying that the 360,000 people that die from drowning globally each year (WHO data), and claim water is dangerous, and we need to remove open bodies of water to keep people safe, with no reference to the aspect that water is required for life. This article seems to imply that reducing atmospheric CO2 levels will magically make food more nutritious again. I’d like to see this gentleman look at industrial chemical farming practices and crop nutrient density with the same sort of scrutiny as this so-called CO2-crop nutrition link.

I’m just very skeptical, especially about this article which the scientist points to CO2 as the cause of poor crop nutritional value with no regard to other factors. The article speaks of findings of decreased levels of iron and zinc in crops and I didn’t see in the article where they also measured and compared not only the amount of iron & zinc from soil samples spanning the same decades like their CO2 data, but also measuring the soil microbial life which makes this iron & zinc available for plants to use.

I invite this mathematician to come sample crops of his choice from the healthy, biologically abundant, remineralized soil from my garden, and compare his findings. The one constant in the equation is my garden is exposed to the same increased atmospheric CO2 levels as the crops he sampled.
 
Posts: 570
Location: South Tenerife, Canary Islands (Spain)
7
forest garden trees greening the desert
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
no need to be shocked and despondent. Commercial growers put CO2 into their greenhouses in concentrations as high as 5000 PPM.

The photosynthesis reaction needs three things - water, CO2 and energy (sunlight). Even if CO2 cant be throttled, one or both of the other two factors can.
 
The glass is neither half full or half empty. It is too big. But this tiny ad is just right:
permaculture bootcamp - learn permaculture through a little hard work
https://permies.com/wiki/bootcamp
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!