Research, Development and Innovation Agency Conference Portal, International Conference on Managing Forest Genetic Resources in Changing Environment and Landscapes

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Biomass and Coppicing Ability of Genetically Improved Calliandra calothyrsus for Wood-Energy with Different Spacing
Rina Laksmi Hendrati, Nur Hidayati, Siti Husna Nurrohmah

Last modified: 2019-05-24

Abstract


Beside wood quality, biomass and ability to coppice of fast-growing woody species for renewable energy are two essential indicators.  Appropriate spacing among individual plant is therefore required to get the best harvest. This study is observing biomass,  branching and coppicing ability of Calliandra calothyrsus at different spacing. Initial experimental plots were using 5 blocks of  16 individuals at  spacing of 0.5x1; 1x1; 0.5x2; 1x2 and 2x2m and assessed at 6 months old around reproductive stage. Due to no significant differences, two spacing plots of 2x1 and 1x1m are compared for biomass and wood dimension assessment from 14 individuals per block replicated into 4 blocks after 3 years. Coppicing ability was counted after 2 months of felling. The results indicated that diameter has positive correlation with number of initial branches as well as number of coppices. Basic density of wood is also increasing with diameter. Between the two type of spacing, the first wood production and the specific gravity are better for 1x2 m than 1x1 m with 104.9 ton/ha (209.8 m3/ha) for 1x2 m and 76.3 ton/ha (190.75 m3/ha) for 1x1m. This indicates a better production than the predicted MAI from the breeding.


Keywords


Key words: Calliandra calothyrsus, Spacing, Wood, Biomass, Energy, Coppice

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