Who hasn’t heard some numpty call CO2 “plant food?”
I saw some studies mentioned that as minimum night time temperatures increased CO2 uptake decreased and there was also a decrease in protein. A new study shows just this:
Quote:Researchers find rice grown in high carbon dioxide environments may be less nutritious
Scientists are warning that rice — one of the world's most important cereal crops and the primary food source for more than 2 billion people — may become less nutritious in the future.
Researchers in Japan and China have found that protein, iron and zinc levels in rice all fell significantly when grown in higher carbon dioxide environments.
For the experiments, scientists built 17-metre-wide octagons in Japanese and Chinese rice paddies that pumped carbon dioxide to simulate the kind of CO2 concentrations expected in the next 50 years (568-590 parts per million).
The research, published in the journal Science Advances, found on average from the varieties tested, protein levels fell by 10 per cent, zinc 8 per cent and iron 5 per cent.
Levels of vitamins B1, B2, B5, and B9 also fell — though results were far more varied.
"When we looked at vitamin B we looked at nine different varieties from Japan and China and they interestingly responded to high CO2 concentration in different ways," the University of Tokyo's Kazuhiko Kobayashi said.
"Some varieties showed a very large decline, some varieties much less a drop of vitamin contents."
http://www.abc.net.au/news/2018-05-24/scientists-warning-rice-may-become-less-nu...Well, I only heard about protein levels (nitrogen uptake) before but it seems mineral and vitamin levels also drop.
The experiment controlled for CO2 concentration. It did not control for the warming 500ppm+ of CO2 causes so add that and the future for nutrition looks pretty bleak!
Malthus will not be denied!
ABC article based on
this paper.
Forum
Pages: 
Relationship to the truth (Read 74002 times)
