Intsia (bijuga)
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David Limtiaco USDA FS - Guam Division of Forestry and Soil Resources 192 Dairy Rd Mangilao, Guam 96923 |
| Family Scientific Name: | Fabaceae | ||
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| Family Common Name: | Pea Family | ||
| Scientific Name: | Intsia bijuga (Coelbr.) O. Kuntz | ||
| Common Name: | Ifit | ||
| Species Code: | INTBIG | ||
| Ecotype: | Guam | ||
| General Distribution: |
Ifit is native to the Indian ocean region eastward to Polynesia. It does not reach Hawaii. It inhabits coastal strand and low elevations; sometimes in or near mangrove swamps; abundant on coral limestone; also found on other rocky soils. In Guam, it is rather common and is an important timber species. It is the territorial tree of Guam. |
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| Propagation Goal: | plants | ||
| Propagation Method: | seed | ||
| ProductType: | Container (plug) | ||
| Stock Type: | 3L (1 gal) containers | ||
| Time To Grow: | 0 | ||
| Target Specifications: | Height: 20 cm<br> Caliper: N/A<br> Root System: Firm Root Plug in container. | ||
| Propagule Collection: | Seeds are hand collected when pods have matured and begin to split open. The fruits are woody legumes containing several large brown seeds. | ||
| Propagule Processing: | Seeds dry in paper bags in a warm, dry room. We extrat seeds from pods by hand. | ||
| Pre-Planting Treatments: | Seeds are scarified by hand filing the seeds. Seeds are soaked in water to remove any inhibitors and to allow full imbibition of seeds prior to sowing.Seeds are directly sown into containers and lightly covered with medium. | ||
| Growing Area Preparation/ Annual Practices for Perennial Crops: |
The Guam Forestry nursery has a year round growing season with periods of high rainfall. The facility is comprised shade structures and an outdoor growing compound. All propagation environments are utilized at different stages of seedling growth to protect seedlings from heavy rains, and provide to temperature and shading variance during production. We irrigate all containers by hand, but are investigating a sub-irrigation system for the nursery. |
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| Establishment Phase: | Seedlings are germinated in a shadehouse or open growing compound. We use a general purpose commercial medium. Containers are watered by hand and fertilized with a liquid, complete fertlizer as needed. | ||
| Length of Establishment Phase: | 1 month | ||
| Active Growth Phase: | Approximately 4 weeks after germination, seedlings are grown in the open growing compound during summer months. During months of intense summer heat, containers are watered daily with occasional deep irrigation to leach out accumulated salts. | ||
| Length of Active Growth Phase: | 4 months | ||
| Hardening Phase: | Irrigation frequency and duration is gradually reduced for 4 to 8 weeks prior to outplanting. Nursery stock is top pruned at this stage. | ||
| Length of Hardening Phase: | 1 month | ||
| Harvesting, Storage and Shipping: | Containerized seedlings are stored in the open growing compound until moved to outplanting site. | ||
| Length of Storage: | Variable; depends on outplanting date | ||
Citation:
Limtiaco, David. 2005. Propagation protocol for production of Container (plug) Intsia bijuga (Coelbr.) O. Kuntz plants 3L (1 gal) containers; USDA FS - Guam Division of Forestry and Soil Resources Mangilao, Guam. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/02). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
