DBH-Based Spacing Optimization for Agarwood Induction – Maximizing Resin Yield While Minimizing Stress
Tree spacing in inoculation is a critical factor to balance resin density, colonization success, and tree survival. Using DBH (Diameter at Breast Height) as a reference allows customized spacing for each tree size.
1. Why DBH Matters
- DBH reflects tree maturity and sapwood volume
- Larger trees can tolerate more inoculation points and slightly closer spacing due to higher cambial activity and sap flow
- Smaller trees require fewer points and wider spacing to avoid over-infection and stress
Principle: Proper spacing ensures localized colonization, controlled resin flow, and healthy cambium.
2. Recommended DBH-Based Spacing
| DBH Class | Depth (cm) | Point-to-Point Spacing (cm) | Number of Points | Notes |
|---|---|---|---|---|
| 10–14 cm | 2–3 | 10–12 | 1–2 | Only light priming; AgarStart™ alone recommended |
| 15–19 cm | 3–4 | 12–15 | 3–5 | Standard FusaPrime™ induction; monitor resin flow |
| 20–24 cm | 3–5 | 15–20 | 5–8 | Full sequential induction; early resin indicators expected |
| ≥25 cm | 4–5 | 18–25 | 8–12 | High-value induction; dual pathway activation recommended |
Tip: Adjust spacing slightly for trunk irregularities or branching points, but maintain minimum safe distance to avoid overlapping colonization zones.
3. Spatial Pattern Recommendations
- Spiral or staggered layout along trunk ensures even resin distribution
- Avoid vertical stacking of inoculation points to prevent sap flow blockage
- For large trunks, alternate sides of trunk to maximize localized cambial response
Visual Principle: Think of a helical ladder around the trunk for consistent coverage.
4. Integration With BarIno™ Products
| Stage | DBH Use | Spacing Strategy |
|---|---|---|
| AgarStart™ | All DBH | Low-density, evenly spaced to prime cambium |
| FusaPrime™ | ≥15 cm | Moderate density, staggered points |
| FusaTrinity™ | ≥20 cm | Dual-pathway amplification; points staggered for synergy |
| FusaBlaze™ / ResinRush™ | ≥20 cm | Densification phase; spacing allows polymerization without stress |
5. Farmer-Friendly Monitoring
- Mark points with paint or tags for monitoring
- Record DBH and spacing for each tree in logbook
- Adjust future induction cycles based on resin formation patterns and tree response
6. BarIno™ Principle
DBH-based spacing is precision control for agarwood induction.
Correct spacing ensures controlled colonization, optimal resin flow, and tree health, maximizing yield and quality.