Assessing the Effect of Rubber (Hevea brasiliensis (Willd. ex A. Juss.) Muell. Arg.) Leaf Chemical Composition on Some Soil Properties of Differently Aged Rubber Tree Plantations
2020
Puttaso, Porntip | Namanusart, Weravart | Thumanu, Kanjana | Kamolmanit, Bhanudacha | Brauman, Alain | Lawongsa, Phrueksa | Faculty of Agriculture [Khon Kaen University] ; Khon Kaen University [Thailand] (KKU) | Rajamangala University of Technology Thanyaburi (RMUTT) | Synchrotron Light Research Institute (SLRI) | Nakhonratchasima Rajabhat University (NRRU) | Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) | LMI LUSES ; Partenaires INRAE | Jeunes équipes associées à l’IRD program (JEAI), the Research Institute for Development (France), Knowledge Development for Rubber Trees in the Northeast (KDRN-KKU) research group, and the Graduate School, Khon Kaen University.
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Show more [+] Less [-]English. Leaf litter plays a major role in carbon and nutrient cycling, as well as in fueling food webs. The chemical composition of a leaf may directly and indirectly influence decomposition rates by influencing rates of biological reactions and by influencing the accumulation of soil organic carbon content, respectively. This study aimed to assess the impact of the chemical composition of rubber (Hevea brasiliensis (Willd. ex A. Juss.) Muell. Arg.) leaves on various soil properties of different ages of rubber (4-5, 11-12, and 22-23 year-old). Synchrotron-based Fourier transform infrared microspectroscopy (Sr-FTIR) was utilized for analyzing the chemical composition of plant leaves. The Sr-FTIR bands illustrated that the epidermis of rubber leaves from 4-5-year-old trees was found to contain a high quantity of polysaccharides while mesophyll from 22-23-year-old trees had a large number of polysaccharides. The change in soil properties in the older rubber plantation could be attributed to its chemical composition. The change in soil properties across all tree ages, i.e., increased litter and organic carbon content, was a relatively strong driver of soil biota evolution. The aliphatic of C-H in the leaves showed high correlation with soil organic carbon (SOC) and permanganate-oxidizable C (POXC) from 22-23 year-old trees. This study shows the differences in the organic chemical composition of leaves that are consequential to soil organic carbon.
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