Table 2
Average K, Mg, and Ca concentrations (% of leaflet dry matter), total leaf cation charge (TLCC), and mineral proportions (% relative to TLCC), observed in the leaflet of rank 17 fronds of four oil palm progenies evaluated from 3 to 6 YAP in Indonesia (PIC, 2011).
| Progenies | K concentration (%) | Mg concentration (%) | Ca concentration (%) | TLCC (cmol kg−1 DM) | [K] (%) | [Mg] (%) | [Ca] (%) | Mineral categories |
|---|---|---|---|---|---|---|---|---|
| C1 | 1.11 b | 0.201 d | 0.84 c | 83.1 c | 34 b | 20 c | 46 c | K{+} Mg{−} Ca{−} |
| C2 | 0.82 c | 0.224 c | 1.15 a | 91.6 a | 23 c | 20 c | 57 a | K{−} Mg{−} Ca{+} |
| C3 | 0.86 c | 0.303 a | 0.98 b | 91.4 a | 24 c | 27 a | 49 b | K{−} Mg{+} Ca{+} |
| C4 | 1.27 a | 0.250 b | 0.83 c | 89.9 b | 36 a | 23 b | 42 d | K{+} Mg{+} Ca{−} |
| p | < 0.0001 | < 0.0001 | < 0.0001 | < 0.0001 | < 0.0001 | < 0.0001 | < 0.0001 |
YAP: Year after planting, p: Probability.
Different letters (a, b, c, and d) indicate significant differences in parameters among oil palm progenies according to a Tukey’s test. Progenies were classified in 2 categories: category (+): leaflet mineral concentration (lmc) > almc and category (−): lmc < almc; where almc is the average leaflet mineral concentration of all progenies (Jacquemard et al., 2009).
[K], [Mg], [Ca]: Mineral proportions (%, relative to TLCC).
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