Fig. 5.

The cumulative water uptake per plant (top) and cumulative P uptake per plant (bottom) by the different root types of rice during a growing period of 52 d. Rice roots were grown under contrasting P rates [P deficiency (NoP), a sub-optimal P amendment in the topsoil (SubP) and a non-limiting P rate in the topsoil (PlusP)] and contrasting water regimes [field capacity (FC) vs. drying periods (DP)]. These simulations enable the differentiation among the water and P uptake by the nodal roots, the S-type lateral roots and the L-type lateral roots.