Teak research

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  This is my research presentation for the Sadaharitha Plantation Ltd
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  • 1. What you should know about Teak… Teak (also known as Tectona grandis): • Is a deciduous hardwood tree indigenous to the dry and hilly terrains of Indonesia and Southeast Asia • Remains one of the most valuable of all hardwoods and is known for its beauty, strength, durability and weather-resistant qualities • Is the leading choice for marine and outdoor furniture applications because the extremely dense wood contains natural oils and rubber content, thereby possessing the greatest capability of any wood to withstand the effects of the harsh outdoor environment • Can naturally endure the effects of sun, rain and even snow without rotting, warping, cracking, shrinkage or swelling
  • 2. What you should know about Teak… • Will naturally age to a beautiful silver-gray hew over the years or with a periodic application of natural teak oil will maintain its original color and richness for a lifetime. • Prices have increased rapidly since 1986.
  • 3. What is the Research? • Tropical countries need to protect their forests and also satisfy their wood requirements. • Forest plantations that are managed in sustainable manner can be effectively used to supply the demand of timber and related product while protecting the valuable natural forests. • One of the main issue faced by teak plantation owners are growth differences and there by the timber quality and income variations. • Therefore the findings of studies can derived in growth variation due to the growth affecting factors can be effectively used in teak plantation management.
  • 4. Growth affecting factors Soil Climate Physical Factors Chemical Factors Rainfall Temperature Silvicultural Management Water Supply Fertilizer Applications
  • 5. Objectives of the study • Identification of growth difference of teak in two different geographical areas in Sri Lanka. • Investigation of the impact of climate variation on teak plantation. • Investigation of the impact of selected soil physical and chemical parameters on growth of teak at young stage.
  • 6. Justification • One of the biggest challenges towards the outlook of forests in the recent times has been concerns about ‘sustainability’ of our resources . • In forestry plantations, there were growth differences and there by the timber quality and income variations. • Problems are occurs due to miss-management. • Approaches are required over come such problems.
  • 7. Methodology • Kumaragama teak plantation • Puttalam teak plantation Site selection Total area: 85.79 ha 7 years old: 25.29 ha Total area: 101.98 ha 7 years old: 80.94 ha
  • 8. Methodology cont. Site comparison (Department of Meteorology, 2014) Puttalam Plantation Kumaragama Plantation Agro ecological zone Low country dry zone (DL3) Low country dry zone (DL1) Annual rainfall (mm) 1696.6 1852.9 Average temperature (°C) 24.4 22.2 Number of dry months (Lower than 1778mm) 7 3
  • 9. (10m) Methodology cont. • Plots selection ▫ Permanent sample plots will be used for all 7 years. • Soil sampling ▫ Debris and litter-fall will be removed ▫ From plot center up to 45 cm depth ▫ Sample will be stored in air-tight plastic containers. Sampling (20m)
  • 10. Methodology cont. • Total tree height measurement • Diameter at breast height Tree measurement
  • 11. Methodology cont. • Soil chemical factors ▫ Total Nitrogen content – kjeldahl method ▫ Phosphorus content – Colorimetric method by using spectrophotometer ▫ Potassium & Magnesium – Atomic absorption spectrophotometer Soil analysis
  • 12. Methodology cont. • Soil physical factors ▫ Soil texture – Sieve analysis method ▫ Soil Water Holding Capacity ▫ Soil Bulk Density Soil analysis
  • 13. Methodology cont. • Climatic details ▫ Daily rainfall and temperature data are collected by Sadaharitha Plantation Ltd at both selected plantations from 2009 Secondary data Other information ▫ Water supply and fertilizers application details will be obtained from the Sadaharitha Plantation Ltd
  • 14. Methodology cont. • Growth comparison ▫ Quantitatively by using statistical analysis  ANOVA will be used for the statistical comparison using MINITAB software ▫ Qualitatively by using line graphs Data analysis
  • 15. Methodology cont. • Example; Growth comparison (between plantations) Qualitative Data analysis Total tree volume /m3 TimeGrowth rate comparison of two plantations Total tree volume /m3 TimeGrowth rate of plantation 1 Total tree volume /m3 TimeGrowth rate of plantation 2 Factors affecting growth
  • 16. Methodology cont. • Example; Growth comparison (within plantation) Qualitative Data analysis cont. Total tree volume /m3 Time Growth rate comparison of plantation Factors affecting growth
  • 17. Methodology cont. Quantitative Data analysis Examples: Minitab Statistical Software will be used to analyze survey data and answer questions that can affect on teak growth. 2-Sample t-Test We use the 2-sample t-test to compare the averages between two groups and determine if there is a significant difference between them. ANOVA Will be used to compare group means for multiple variables. Regression Will be used to examine or predict how particular continuous variables affect a particular outcome—for example, how teak growth rate correlates with soil conditions.
  • 18. References Lankathilaka, M. A., & Subasinghe, S. M. C. U. P. (2012, September). Change of nutrient contents of teak seedlings (tectona grandis linn f.) under different compost treatments. In Proceedings of International Forestry and Environment Symposium (Vol. 15). Nielsen, D. R., Biggar, J. W., & Erh, K. T. (1973). Spatial variability of field- measured soil-water properties. University of California, Division of Agricultural Sciences. Pandey, D., & Brown, C. (2000). Teak: a global overview. UNASYLVA-FAO-, 3- 13. Randeni, K. R. A. H. A., & Subasinghe, S. M. C. U. P. (2012, March). Establishment of relationships of growth at 7 years old Mahogany trees with selected site factors in low country wet zone, using GIS as a tool. In Proceedings of International Forestry and Environment Symposium (Vol. 14). Subasinghe, S. M. C. U. P., & Gunarathne, W. P. K. (2012) Construction of a precise growth model to predict the individual tree stem volume for mature Tectona grandis lf (teak).
  • 19. Thank You
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