Canopy leaf area and carbon gain estimation of five rubber clones (Hevea brasiliensis Muell Arg)

Name: Duenpen Srisondee

LCSH: Kasetsart University -- Theses. M.S. (Agricultural Resources) 201

Classification :.LCCS: SB291.H4

LCSH: Kasetsart University. -- Faculty of Natural Resources and Agro Industry -- Theses

LCSH: Hevea -- Growth

LCSH: Hevea -- Carbon content

LCSH: Hevea -- Climatic factors

Abstract: This research aimed to develop a new canopy leaf area and carbon gain estimation of 4 to 5 year-old young rubber tree in the field. The result showed that rainfall were major different between season and important to trunk radial growth of rubber tree. Dynamics of trunk diameter bases on each season showed no growth from late cold season to mid dry season (December to February). There was a slight and unsteady growth from late February to mid April. Significant continuous growth started from mid April until November, which is the rainy season. Development of the method for canopy leaf area estimation showed the suitable simple equation for canopy leaf area of mixed clones young rubber tree is the LA = 0. 0986F>3 0. 957 (F>3 Equation; R² = 0. 8878, RMSE = 4.78). When applied multiple regression it shown more accuracy to the estimation adjusted R2 equal 0.9460, the root mean square errors were 3.79. As the result is LA = 0.01948G170 1.298F>3 0.5042 (G170F>3 Equation). Development of the method for biomass estimation showed that the trunk girth at 170 cm height measured (R2=0.8514) provide an effective non-destructive method to follow biomass in each plant part of young rubber trees up to 4 or 5 years. The carbon content in each plant part has been analyzed. Carbon gain was estimated from carbon content before and after interesting period. Carbon gain estimation of rubber tree showed non-significantly difference between clone. The carbon gain of each clone range between 0.4 to 0.5 kg/year/tree. Monthly, carbon gain were significantly difference between plant part. Seasonal, carbon gain were very significantly difference between season.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Jessada Phattaralerphong

Role: Thesis Advisor

Name: Suphasit Sitthaphanit

Role: Thesis CO-Advisor

Name: Do, Frederic C

Role: Thesis CO-Advisor

Created: 2019

Modified: 2025-07-02

Issued: 2025-07-02

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2562/duenpen-sri-all.pdf

CallNumber: SB291.H4 .D83

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Agricultural Resources

Grantor: Kasetsart University

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