Some crop species could be used inside a cropping system as part of a strategy to increase soil P availability due to their capacity to recycle P and shift the equilibrium between soil P fractions to benefit the main crop. The release of P by crop residue decomposition, and mobilization and uptake of otherwise recalcitrant P are important mechanisms capable of increasing P availability and crop yields.
Restoration and Dynamic Pattern of Natural Herbaceous Vegetation of Xiangxi River�s Water-Level Fluctuation Zone in the Three Gorges Reservoir Area