1 / 21

Impact of Climatic Factors & Adaptation Measures On Productivity of Tea Plantations In Sri Lanka

Impact of Climatic Factors & Adaptation Measures On Productivity of Tea Plantations In Sri Lanka. M.A.Wijeratne Tea Research Institute of Sri Lanka. Impact of the Tea Industry. Employment. Foreign exchange. Farmer’s Income. Environment. Tea Growing Regions in Sri Lanka. Major….

violet-jones
Download Presentation

Impact of Climatic Factors & Adaptation Measures On Productivity of Tea Plantations In Sri Lanka

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Impact of Climatic Factors & Adaptation Measures On Productivity of Tea Plantations In Sri Lanka M.A.Wijeratne Tea Research Institute of Sri Lanka

  2. Impact of the Tea Industry Employment Foreign exchange Farmer’s Income Environment

  3. Tea Growing Regions in Sri Lanka Major… U- Up country (>1200m amsl) T:10-27 oC M- Mid country (600-1200m amsl) T:19-30 oC L- Low country (<600m amsl) T:21-34 oC C Agro-Ecological Regions…. Up country wet zone (WU 1-3) RF:1400->3175mm Up country Intermediate zone (IU 1-3) RF:1150->2150mm Mid country Wet zone (WM 1-3) RF:1250->3150mm Mid country Intermediate zone (IM 2) RF:1150->1400mm Low country Wet zone (WL 1-2) RF:1900->2525mm

  4. IM WM IU WL WU

  5. Smallholder Up-Wet Up-Int. Low-Wet

  6. Most Influential Environmental Factors… Present Rainfall (>1200mm) Temperature (18-25oC) Drought damage in tea Future (with CC) Rainfall Temperature CO2

  7. Region Most Vulnerable to CC..… Drop: 26% Loss: 70 Mn USD Low Country 56% Drought Up Country 26% 18% Mid Country 1992

  8. Methodology Data Collection • Estates (RF & Productivity) • Met Stations (RF & Temperature) • TRI Experiments (CO2 & Adaptations) Problems encountered • Missing data (non-continuity) • Reliability • Classification (Elevation)

  9. Methodology Data Analysis • Trends • Correlations • Extreme events Productivity Problems encountered • Variability (Variety/Management/growth • Missing data Time

  10. National Productivity Drought 1992

  11. Productivity in different regions & Drought Effects POTEN. 26% 28% 19% 14% 1991 25% WU IU 1992 WM IM WL

  12. Productivity vs Environmental factors PRELIMINARY RESULTS Rainfall (mm)-Dry month & Monthly yield (kg/ha) Up country wet zone (WU 1-3) RF:1400->3175mm YIELD=116+0.23 RF: r2 = 0.15 (p<0.05) Up country Intermediate zone (IU 1-3) RF:1150->2150mm YIELD=76.7+0.32 RF: r2 =0.21 (p<0.05) Mid country Wet zone (WM 1-3) RF:1250->3150mm YIELD=78.7 + 0.75 RF: r2 =0.77 p<0.05) Low country Wet zone (WL 1-2) RF:1900->2525mm YIELD=62.9 + 0.25 RF: r2 =0.66 (p<0.05)

  13. Productivity vs Environmental factors Temperature & Monthly yield (kg/ha) Up country wet zone (WU 1-3) RF:1400->3175mm Y= -219+24.5 T: r2 = 0.12 (p<0.05) Up country Intermediate zone (IU 1-3) RF:1150->2150mm Y= -310+25 T: r2 =0.13 (p<0.05) ENTIRE REGIONS Y= -508+63.7 T – 1.46 T2 (p<0.05)

  14. Productivity vs Environmental factors CO2 vs Mean yield (kg/ha/wk) Yield 45% 18% 600ppm Enriched Control Month

  15. Adaptations Irrigation Supply of water/nutrients Yield increase (wet): 50->100% Yield increase (dry): >300% increase Limitations Availability of water resources

  16. Adaptations Soil improvements Enhanced Microbial activity Increased CEC Enhanced porosity & WHC Improved Soil Structure Addition of compost Burying of prunings 25% Yield Increase per 1% OC (8-10 tons of OC/ha/ year) Limitations Availability of resources: Labour & Material

  17. Adaptations Shade management Control of temp:(2oC) /RH Addition of GM: (5-20t/ha/yr) Limitations Management difficulties

  18. Adaptations Intercropping Provision of shade Other benefits Limitations Poor returns compared to monocropping of tea ??

  19. Adaptations Diversification of marginal tea lands • Timber/Forest/Grass • Source of green manure • Preserve environment Limitations Social implications ??

  20. THE END…

More Related