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The warmers are trying to get ahead of studies showing increased CO2 increases plant yields and green vegetation in general.
That's old news, I'm not sure why you think anyone is "getting ahead" of it. Greenhouse growers with high-value crops (ahem - the devil's weed) have been buying CO2 machines for years.
Quote:
Originally Posted by momonkey
In other words, yes, there will be more rice, but it won't quite as nutritious as the pre-CO2 rice.
It may not be. It is also old news that the nutrients a plant contains is mightily affected by its growing environment. Plants, like you, can grow in a sub-optimal environment, but they are healthiest if they grow in a good environment.
Quote:
Originally Posted by momonkey
Well......that settles it.
I'm going to have to start walking everywhere I go, stop using all fossil fuels, eat only locally sourced vegetables and kill all the cows so they won't fart anymore.
Well, you can if you want.
But you are missing a major point here. Photosynthesis is a chemical process, and like all chemical processes, there is an optimal temperature range for it. The enzymes that facilitate photosynthesis will begin to denature if the temperature gets too hot. Also, as the temperature increases, the plant closes its stomata, which conserves water, but also prevents the plant from taking in CO2. So, although both warmth and CO2 can, like water and fertilizer, increase crop yields, if it gets too hot, crop yields will decrease. That upper limit varies somewhat with species, depending on the photosynthesis type (yes, there's more than one) and on other specific adaptations, but as a rule of thumb, once it gets around 100 degrees F, the plant stops photosynthesizing. (Optimum temperature is around 80 degrees.)
A lesser factor is night temperatures. Obviously, photosynthesis does not occur at night, but respiration does. And nights that are too hot can negatively affect respiration and therefore plant growth.
BTW, how temperatures affect plant photosynthesis and respiration is also old news.
That so many of you think that increased CO2 and increased warmth are nothing but good news for plants just shows how little you know about photosynthesis. Clearly, you aren't gardeners, because, as I said above, there is absolutely nothing new about anything I've said.
Why trumpists, right wingers in general never get tired of repeating the same old nonsense they've picked from Rush and such, it is not only unscientific, science means little to scientifically illiterates, but each and every denial trick rightwingers overuse makes no common sense whatsoever. What gives?
Thing is they dont know. No one knows and giving politicians a mandate in attempts to find out isn't going to end well for planet earth.
everything the state does is politicized, so team D will do it their way to the benefit of their cronies and then team R will come along and change it to their benefit. What should be done (if anything) will be lost in the shuffle.
Its every damn thing the govt does and what is funnier still is you see the same people who loath the very existence of a President Donald Trump, failing to realize once govt is empowered to manage the climate there will likely be someone worse than him who eventually takes his place. It's as if they dont realize what govt is or how it works. If they truely cared and understood they'd be demanding govt stay out of it alltogether.
Its the most mind boggling thing to watch.
No one knows = ignore science.
Very difficult time to move ahead addressing climate change when you have a president that doesn't even believe his own agencies, forget about NASA and NOAA, he doesn't even believe the military or the joint agency reports on the impact.
That's old news, I'm not sure why you think anyone is "getting ahead" of it. Greenhouse growers with high-value crops (ahem - the devil's weed) have been buying CO2 machines for years.
It may not be. It is also old news that the nutrients a plant contains is mightily affected by its growing environment. Plants, like you, can grow in a sub-optimal environment, but they are healthiest if they grow in a good environment.
Well, you can if you want.
But you are missing a major point here. Photosynthesis is a chemical process, and like all chemical processes, there is an optimal temperature range for it. The enzymes that facilitate photosynthesis will begin to denature if the temperature gets too hot. Also, as the temperature increases, the plant closes its stomata, which conserves water, but also prevents the plant from taking in CO2. So, although both warmth and CO2 can, like water and fertilizer, increase crop yields, if it gets too hot, crop yields will decrease. That upper limit varies somewhat with species, depending on the photosynthesis type (yes, there's more than one) and on other specific adaptations, but as a rule of thumb, once it gets around 100 degrees F, the plant stops photosynthesizing. (Optimum temperature is around 80 degrees.)
A lesser factor is night temperatures. Obviously, photosynthesis does not occur at night, but respiration does. And nights that are too hot can negatively affect respiration and therefore plant growth.
BTW, how temperatures affect plant photosynthesis and respiration is also old news.
That so many of you think that increased CO2 and increased warmth are nothing but good news for plants just shows how little you know about photosynthesis. Clearly, you aren't gardeners, because, as I said above, there is absolutely nothing new about anything I've said.
uhm...you know that we sell co2 generators for greenhouses.....plants need co2... higher co2 helps with photosynthesis
Very difficult time to move ahead addressing climate change when you have a president that doesn't even believe his own agencies, forget about NASA and NOAA, he doesn't even believe the military or the joint agency reports on the impact.
No. Recognition of fact. And recognize the political process and the motivations at work.
As you were.
uhm...you know that we sell co2 generators for greenhouses.....plants need co2... higher co2 helps with photosynthesis
Yes, I pointed that out. I don't understand how you missed it, it's literally the subject of my first two sentences, but oh well.
When it gets too hot, about 100F or so, the plant stops caring how much CO2 is in the atmosphere. Instead, it starts to care how much water it is losing by transpiration, so it closes its stomata to conserve water. That also means it ceases to absorb CO2, since the stomata are where gas exchange occurs. Also, when it gets that hot, the enzymes needed for photosynthesis denature. For both these reasons, when it gets that hot, photosynthesis ceases.
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