akar.earthDurian (Durio zibethinus): Growth, Allometry and Carbon Potential
Durian carbon sequestration in Indonesian agroforestry: range, productive life, wood density, allometry, carbon role, livelihoods and key risks.
Durian stores substantial carbon because it grows into a large, long-lived tree that farmers keep for decades for its fruit. In Indonesian agroforestry it combines durable above-ground carbon with a strong income motive, which is exactly what smallholder carbon projects need for survival and permanence.
Identity and range
Durian (Durio zibethinus) is in the mallow family, Malvaceae (formerly placed in Bombacaceae). In Indonesia it is simply called durian, with many local varieties and names. Borneo also hosts many wild Durio species, such as durian merah and lai (D. kutejensis).
The species is native to the Malay Peninsula, Sumatra and Borneo. It is now grown throughout Indonesia, with important production in Sumatra, Kalimantan, Java and Sulawesi. Hundreds of named local varieties exist, and commercial grafted plantings are growing.
Growth habit and rotation
Durian is an evergreen canopy tree. Seedling trees can exceed 30 m, while grafted orchard trees are usually kept shorter. It needs deep, well-drained soil, high rainfall and no long dry season. It does not tolerate waterlogging.
Grafted trees can start fruiting after around 4 to 6 years; seedling trees take longer. Productive life runs for many decades, and old village trees can be very large. Reported growth rates vary widely with variety, grafting and management, so we do not quote a standard increment.
Durian flowers open at night and are pollinated mainly by nectar-feeding bats, which links durian yields to healthy bat populations and nearby forest.
Wood density and biomass estimation
Durian wood is moderate in density. Reported values for Durio zibethinus sit roughly between 0.5 and 0.65 g/cm³. Wood density varies with site and age, so record your value and source.
Use the Chave et al. 2014 pantropical model:
AGB (kg) = 0.0673 × (ρ × D² × H)^0.976
where ρ is wood density (g/cm³), D is DBH (cm) and H is height (m). For grafted orchard trees, measure DBH at 1.3 m and note if the graft union or low branching forces a different height. Height matters, because pruned orchard trees are shorter than forest trees of the same diameter. We are not aware of a widely used durian-specific equation; mixed-species agroforestry equations from Southeast Asia are an alternative. See the allometric equations guide.
Convert to carbon with the IPCC default 0.47 and to CO2 with 44/12.
Carbon role in ARR and agroforestry
Durian is a strong anchor species for agroforestry carbon projects in Indonesia:
- Long-lived stock. Farmers keep fruit trees for decades rather than felling them on a cycle, which supports permanence.
- Survival. Farmers care for trees that pay. That improves survival rates compared with timber-only planting.
- Mixed systems. Durian sits well in multi-strata gardens with rubber, cinnamon, coffee, petai and timber trees, such as the traditional agroforests of Sumatra and Kalimantan.
For ARR projects under VM0047, fruit trees can count as woody biomass if the land is eligible and the project is additional. Check eligibility rules, because converting existing orchards does not count as new removals.
Co-benefits and livelihoods
Durian is one of the most valuable fruits in Southeast Asia, and export demand has grown. A few mature trees can be a major part of household income. Wood from old trees is used locally for light construction.
Risks and cautions
- Disease. Phytophthora stem canker and root rot are the main killers of durian trees, especially on poorly drained soils.
- Monoculture orchards. Commercial durian blocks on cleared land reduce biodiversity and can drive deforestation. Projects must avoid clearing forest.
- Pollinators. Loss of nearby forest and bats reduces fruit set.
- Price swings. If prices fall, farmers may neglect or replace trees.
- Wind. Large trees with brittle branches can break in storms.
Planning notes for project developers
- Use grafted stock. Grafted seedlings fruit sooner, which keeps farmers engaged through the early years.
- Drainage first. Plant on raised mounds or well-drained ground to avoid Phytophthora losses.
- Pair with timber natives. Mixing durian with native timber trees raises long-term carbon and spreads risk.
- Record each tree. Geotagged tree records help prove survival, growth and EUDR-style land history if fruit is exported.
Worked example
A mature durian with DBH 35 cm, height 18 m and wood density 0.55 g/cm³:
- ρ × D² × H = 0.55 × 1,225 × 18 = 12,128
- AGB = 0.0673 × 12,128^0.976 ≈ 651 kg
- Carbon = 651 × 0.47 ≈ 306 kg C
- CO2e = 306 × 44/12 ≈ 1,122 kg CO2e (above-ground only)
Run your own trees through the tree CO2 calculator, and see smallholder ARR aggregation for scaling up.
Frequently asked questions
How much carbon does a durian tree store?
Durian grows into a large tree. One with 35 cm DBH, 18 m height and density near 0.55 g/cm³ holds about 650 kg of above-ground biomass, roughly 1.1 t CO2e, by the Chave et al. 2014 model.
Is durian good for carbon projects?
Yes, as part of agroforestry. Farmers keep durian trees for decades for fruit, so the carbon stays standing, and fruit income motivates care and survival.
What wood density should I use for durian?
Reported values for Durio zibethinus are moderate, roughly 0.5 to 0.65 g/cm³. Values vary with site and age; use a measured or database value and state it.
How long does a durian tree produce fruit?
Grafted trees can start fruiting after about 4 to 6 years and seedlings later. Well-managed trees keep producing for many decades.