Fertilization trajectory of the root crop Raphanus sativus across atmospheric pCO2 estimates of the next 300 years

摘要: a b s t r c Plant biomass is known to increase in response elevated atmospheric CO 2 concentration (pCO ); however,noexperimentshavequantifiedthetrajectoryofcropfertilizationacrossthefullrangeofpCO levels estimated for the next 300 years. Here we quantify above- and below-ground of Raphanus sativus(common radish) across eightpCO ranging from 348 1791ppmv. We observed large net 58% above ground 279% below ground. A part (38% above-ground 53% below-ground) represented fertilization at high ofpCO (700‐1791ppmv) predicted if fossil fuel emissions continue unabated. The trajectory inR. sativusgreatly exceeded based on extrapolation previous experiments plants grown atpCO <800ppmv. Based experimental parameters used grow these plants, hypothesize that represent maximum can be achieved this plant growing under low light levels. If enhancement have quantified forR. sativusrepresents generalized root-crop extrapolated agricultural systems, very highpCO could dramatically augment crop production some poorest nations world, provided water resources are sufficient sustainable.