Propagating laak bamboos (Bambusa philippinensis) by incubation method for livelihood and environmental protection in Davao Province.
Caasi, M. G.;
Sylvatrop Year: 1988, publ. 1990 Vol: 13 Issue: 1-2 Pages: 37-46 Ref: 2 ref.
1990
บทคัดย่อ
Bamboo planting is carried out in Davao, Philippines, in order to supply poles as props for the large-scale Cavendish banana plantations, and also for use as raw material in the furniture industry. This paper describes the traditional approach to propagation of B. philippinensis (which uses direct planting in the field of 2-node culm cuttings or of offsets dug from the ground and separated from the mother clumps), and an incubation (or nursery) method which has recently been developed. The new method uses 2-node cuttings taken from 1-2 yr old culms. The open node is filled with water and the cuttings are planted in a nursery bed which is covered with plastic sheeting. Survival is best in cuttings from 15-month-old culms. After 7-10 days, when buds have developed, the cuttings are transferred to an 8x10 inch black polybag with the first node at least 1.0-1.5 inches below the soil surface, and [NPK] fertilizer is applied. The cuttings are allowed to grow in a shaded area, and after 20 days are partially hardened by transferring to a partially shaded area; 15 days later they are hardened further by moving to full sunlight. The potted cuttings are ready for transplanting 45-60 days later. Offsets from old stumps can be used instead of cuttings, but do not require the initial incubation in the nursery bed. Instead, they are directly planted in polybags, and are ready for transplanting 15-30 days later. Planting stock establishment and management are described for mountain/hillside areas (dominated by Imperata cylindrica or secondary growth forest), floodplain areas and waterlogged areas (the latter are best for B. philippinensis). The procedures for, and relative merits of selective and clear cutting harvesting methods are described, and postharvest technology, utilization, and ecological and socioeconomic aspects of large-scale bamboo plantings discussed.