More alarmism and hysteria about CO2!
CO2 is a life essential trace gas!
This latest nonsense is based on a 2018 meta study using extremely high and unrealistic CO2 levels!
"... The amount of nutrient decline varies by experiment and plant, and most experiments double the current CO2 levels. A 2018 review of 50 articles published in Frontiers in Plant Science found that when carbon levels rise, protein levels drop by nearly 10%, iron by 16%, zinc by about 9%, and magnesium by about 9%. ..."
From the abstract:
"Elevated atmospheric CO2 (eCO2) enhances the yield of vegetables and could also affect their nutritional quality. We conducted a meta-analysis using 57 articles consisting of 1,015 observations and found that eCO2 increased the concentrations of fructose, glucose, total soluble sugar, total antioxidant capacity, total phenols, total flavonoids, ascorbic acid, and calcium in the edible part of vegetables by 14.2%, 13.2%, 17.5%, 59.0%, 8.9%, 45.5%, 9.5%, and 8.2%, respectively, but decreased the concentrations of protein, nitrate, magnesium, iron, and zinc by 9.5%, 18.0%, 9.2%, 16.0%, and 9.4%. The concentrations of titratable acidity, total chlorophyll, carotenoids, lycopene, anthocyanins, phosphorus, potassium, sulfur, copper, and manganese were not affected by eCO2. Furthermore, we propose several approaches to improving vegetable quality based on the interaction of eCO2 with various factors, including species, cultivars, CO2 levels, growth stages, light, O3 stress, nutrient, and salinity. Finally, we present a summary of the eCO2 impact on the quality of three widely cultivated crops, namely, lettuce, tomato, and potato."
No comments:
Post a Comment