Effective utilization of clonal seed orchard of teak and production of improved planting stock.

摘要

The aim of the present study was to develop a technique for large scale production of genetically improved planting materials from the existing clonal seed orchard of teak (Tectona grandis) (1000 ha) and use it effectively for the planting programme. Teak seeds were collected from CSO, Maharashtra and plus tree from Topslip, Tamil Nadu, India and seedlings were raised in the beds and maintained. The cuttings were treated with IBA (1000 ppm) and planted in root trainers filled with coir fibre (rooting media). Adventitious rooting occurred within 20 to 25 days after planting. The experiment was conducted in different months and significant rooting was observed (80 to 100%) throughout the year and there was no seasonal impact on rhizogenesis. To study the growth performance and the gain, a field trial with improved planting stock raised vegetatively from CSO and seedlings was established at Karunya. It is concluded that the vegetative propagation of CSO seedlings is a cost effective technique which can be followed by State Forest Departments for large scale production of improved planting materials, and it is the most suitable method for the effective utilization of existing clonal seed orchards in the country. The plantation raised through CSO is expected to enhance productivity by 17 to 20%.