Our objectives in this study were to measure the effects of low levels
of root system carbon dioxide on peach tree growth (Prunus persica L.
Batsch) and nutrient uptake. Using soil and hydroponic systems, we fo
und that increased root CO2: 1) increased root growth without increasi
ng shoot growth, 2) increased leaf P concentration, 3) decreased leaf
N concentration, and 4) reduced water use relative to air injection or
no treatment.