Looking at other things increasing in the future. Well if we aren't going to restrict population growth then I suppose we should look for way to increase the growth productivity of the land we farm. Or there will be lots of starving folks.
Plant Growth Response to CO2 and Nitrogen (Grasses) -- Summary
Perennial ryegrass (Lolium perenne L.) has been used as a model
species in many experiments to help elucidate grassland responses to
atmospheric CO2 enrichment and soil nitrogen availability. In the FACE
study of Rogers et al. (1998), for example, plants exposed to 600 ppm
CO2 exhibited a 35% increase in their photosynthetic rates without regard
to soil nitrogen availability. However, when ryegrass was grown in plastic
ventilated tunnels at twice-ambient concentrations of atmospheric CO2,
the
CO2-induced photosynthetic response was about 3-fold greater in a
higher, as opposed to a lower, soil nitrogen regime (Casella and
Soussana, 1997). Similarly, in an open-top chamber study conducted by
Davey et al. (1999), it was reported that an atmospheric CO2
concentration of 700 ppm stimulated photosynthesis by 30% in this
species when it was grown with moderate, but not low, soil nitrogen
availability. Thus, CO2-induced photosynthetic stimulations in perennial
ryegrass can be influenced by soil nitrogen content, with greater positive
responses typically occurring under higher, as opposed to lower, soil
nitrogen availability.
Pass the CO2 please.
co2science.org
tom watson tosiwmee |
