. 2021 Sep 27;21:437. doi: 10.1186/s12870-021-03190-4

Table. 1.

Soil pH, strontium nitrate (Sr(NO₃)₂)- and diethylene triamine pentaacetic acid (DTPA)-extractable Zn concentrations and total Zn concentrations of rhizosphere soils collected from the native habitat of D. subsp. pilosum and D. subsp. sumatranum. The number of samples is 4 for each subspecies; pH and concentrations are given as ranges and means

Parameter	Dichapetalum gelonioides subsp. pilosum	Dichapetalum gelonioides subsp. sumatranum
pH	4.35–4.95 [4.70]	4.80–4.95 [4.85]
Sr(NO ₃ ) ₂ -Zn (µg g ^− 1 )	0.05–4.0 [1.5]	0.65–6.0 [3.0]
DTPA-Zn (µg g ^− 1 )	0.75–5.5 [2.05]	0.75–8.5 [4.5]
Total Zn (µg g ^− 1 )	10–45 [25]	55–65 [60]

Parameter

Dichapetalum gelonioides subsp. pilosum

Dichapetalum gelonioides subsp. sumatranum

4.35–4.95

[4.70]

4.80–4.95

[4.85]

Sr(NO ₃ ) ₂ -Zn (µg g ^− 1 )

0.05–4.0

[1.5]

0.65–6.0

[3.0]

DTPA-Zn (µg g ^− 1 )

0.75–5.5

[2.05]

0.75–8.5

[4.5]

Total Zn (µg g ^− 1 )

10–45

[25]

55–65

[60]