The Release of Endogenous Nitrogen and Phosphorus in the Danjiangkou Reservoir: A Double-Membrane Diffusion Model Analysis

Table 3

Average contents of P in the surface sediments of different sampling sites.

Sampling sites	LP/(mg·kg^-1)	Fe-P/(mg·kg^-1)	Ca-P/(mg·kg^-1)	OP/(mg·kg^-1)	IP/(mg·kg^-1)	TP/(mg·kg^-1)	NH4^+-N/(mg·kg^-1)
DJK1	a	a	a	a	a	a	a
DJK2	b	b	b	a	b	b	a
DJK3	ab	bc	b	b	b	b	b
DJK4	2b	c	c	c	c	c	c
DJK5	b	bc	c	b	c	b	c

Note: different letters after the values indicate significant differences (), .