Summary of the effect of fertilizer-phosphorus source on total plant tissue properties (belowground plus aboveground vegetative plus grain) for rice grown in a P-deficient, silt-loam soil under flood-irrigated conditions in the greenhouse. Least square means are reported, with n = 4 observations for MAP and RP, but n = 3 observations for DAP, ECST, TSP, and the UC and n = 2 observations for CPST due to missing data from one dead plant and grain masses that were too low for any chemical analyses.

Table 7: Summary of the effect of fertilizer-phosphorus source on total plant tissue properties (belowground plus aboveground vegetative plus grain) for rice grown in a P-deficient, silt-loam soil under flood-irrigated conditions in the greenhouse. Least square means are reported, with n = 4 observations for MAP and RP, but n = 3 observations for DAP, ECST, TSP, and the UC and n = 2 observations for CPST due to missing data from one dead plant and grain masses that were too low for any chemical analyses.

Plant Property^†	P-value	Fertilizer-P Source^†							Overall mean
Plant Property^†	P-value	ECST	CPST	MAP	DAP	TSP	RP	UC	Overall mean
Total plant DM (kg m^-2)	0.03	4.2 ab^‡	3.8 b	5.1 a	4.3 ab	5.1 a	4.0 b	3.7 b	-
Total plant DM uptake
N (g m^-2)	< 0.01	69.1 ab	55.6 cd	69.9 ab	80.2 a	64.5 bc	55.7 cd	49.6 d	-
P (g m^-2)	0.09	7.5	7.0	8.2	7.3	8.7	6.4	6.4	7.4
K (g m^-2)	0.56	16.8	17.1	16.6	14.6	19.1	17.8	16.8	17.0
Mg (g m^-2)	0.48	11.0	11.2	13.1	10.9	11.9	11.8	9.8	11.4
Ca (g m^-2)	0.23	12.9	14.7	17.9	17.3	17.7	16.8	11.7	15.6
Fe (g m^-2)	0.01	27.6 bc	41.8 ab	50.6 a	47.8 a	58.3 a	36.1 ab	21.0 c	-
Mn (g m^-2)	0.14	5.9	6.9	7.7	7.1	9.0	7.4	4.7	7.0
Zn (g m^-2)	0.02	0.19 abc	0.16 bc	0.22 ab	0.17 bc	0.24 a	0.16 c	0.15 c	-

^†Dry matter (DM), electrochemically precipitated struvite (ECST), chemically precipitated struvite (CPST), monoammonium phosphate (MAP), diammonium phosphate (DAP), triple superphosphate (TSP), rock phosphate (RP), and unamended control (UC); ^‡Means in a row followed by different letters are different at P ≤ 0.05.