Table 2. Phosphorus forms identified in NaOH-EDTA extracts of aquatic macrophytes and algae by enzymatic hydrolysis.

Code	Sample	Pi	Total hydrolyzable Po	Phytate-like P	labile Monoester P	Diester P	Enzyme-stable P
		% of total P extracted
A1	Foxtail algae	33.4 ± 5.1a	26.9 ± 3.4	23.5 ± 2.6	3.4 ± 0.5	—b	39.7 ± 5.4
A2	Common reed	58.7 ± 4.8	11.8 ± 2.1	—	8.0 ± 1.5	3.8 ± 0.5	29.5 ± 2.8
A3	Verticillata	61.0 ± 3.6	31.2 ± 2.9	18.5 ± 1.4	12.7 ± 0.4	—	7.8 ± 0.1
B1	Microcystis	30.0 ± 4.8	41.3 ± 5.8	26.4 ± 5.8	14.9 ± 2.8	—	28.7 ± 4.1
B2	Chlorella vulgaris	42.3 ± 5.6	15.5 ± 2.3	12.2 ± 0.9	3.3 ± 0.5	—	42.2 ± 0.8
B3	Spirulina	34.2 ± 2.4	42.9 ± 1.8	4.8 ± 0.2	31.3 ± 2.1	6.8 ± 0.5	22.8 ± 1.7
		mg kg -1
A1	Foxtail algae	820 ± 125	660 ± 83	577 ± 64	83 ± 12	—	975 ± 133
A2	Common reed	697 ± 57	140 ± 25	—	71 ± 6	45 ± 6	350 ± 33
A3	Verticillata	1860 ± 110	951 ± 88	564 ± 43	387 ± 12	—	238 ± 3
B1	Microcystis	2429 ± 389	3344 ± 470	2138 ± 470	1206 ± 227	—	2324 ± 332
B2	Chlorella vulgaris	3735 ± 494	1369 ± 203	1077 ± 79	291 ± 44	—	3726 ± 71
B3	Spirulina	3497 ± 245	4387 ± 184	491 ± 21	3200 ± 215	695 ± 51	2331 ± 174

^aMean with standard deviation, n = 3.

^b“−”:not detected or negative value.