Table 3 Rhizosphere soil chemistry in the natural habitat of Dichapetalum gelonioides subsp. tuberculatum, subsp. sumatranum and subsp. pilosum. Elemental concentrations in µg g−1.
Dichapetalum gelonioides subsp. | n | pH | Ni | Zn | Mg | P | K | Ca | Cr | Mn | Fe | Co |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total | ||||||||||||
tuberculatum | 1 | 6.01 | 785 | 35 | 28395 | 105 | 30 | 200 | 1035 | 1350 | 23915 | 50 |
sumatranum | 1 | 4.64 | 3.6 | 20 | 715 | 85 | 405 | 150 | 3.0 | 115 | 4490 | 1.5 |
pilosum | 1 | 5.05 | 8.4 | 35 | 1285 | 220 | 850 | 685 | 6.0 | 335 | 10680 | 1.0 |
DTPA-extractable | ||||||||||||
tuberculatum | 1 | 185 | 4.6 | — | — | — | — | 0.17 | 375 | 125 | 10 | |
sumatranum | 1 | 0.7 | 10 | — | — | — | — | 0.03 | 60 | 155 | 0.5 | |
pilosum | 1 | 1.6 | 6.7 | — | — | — | — | 0.03 | 240 | 160 | 1.0 | |
Sr(NO 3 ) 2 -extractable | ||||||||||||
tuberculatum | 1 | 10 | 0.2 | — | — | — | — | 0.07 | 6.5 | 0.5 | 0.3 | |
sumatranum | 1 | 0.4 | 7.2 | — | — | — | — | 0.02 | 60 | 1.7 | 0.5 | |
pilosum | 1 | 0.3 | 1.4 | — | — | — | — | 0.01 | 110 | 0.8 | 0.5 | |
