Background and aims The need for efficient use of
phosphorus (P) in agriculture has been highlighted recently
by concerns about the finite amount of P fertilizer
resources. However, in the Taihu Lake Region (TLR) of
China, farmers’ injudicious and excessive use of P fertilizer
has led to a dramatic spike in P accumulation.
Methods A five-year (ten consecutive crop seasons) pot
experiment was conducted using four paddy soils with
three P concentrations (2 P-rich, 1 P-moderate, and 1 Pdeficient
soils) from the TLR under four P fertilization
regimes: P fertilization only for the wheat season (PW),
P fertilization only for rice season (PR), P fertilization
for both rice and wheat seasons (PR+W), and no P
fertilization during either season (Pzero; control)
regimes