Effect of Spacing on Growth, Biomass Yield and Quality of Leucaena (Leucaena leucocephala (Lam.) de Wit.) for Renewable Energy in Thailand

Songyos Chotchutima, Kunn Kangvansaichol, Sayan Tudsri, Prapa Sripichitt

Department of Agronomy, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand.
PTT Research and Technology Institute, PTT Public Company Limited, Ayutthaya, Thailand.

DOI: 10.4236/jsbs.2013.31006                

Abstract

The present study was conducted to determine the effect of spacing on the growth, biomass production and wood quality of leucaena in order to be used as a fuel crop. Leucaena was grown in a field experiment at the Suwanvajokkasikit Research Station, Pak Chong,Nakhon Ratchasima,Thailandin 2006-2010. The experiment was arranged in a randomized complete block design with 4 replications. The treatment consisted of six spacings (1 × 0.25, 1 × 0.5, 1 × 1, 1 × 1.5, 2 × 0.5 and 2 × 1 m). The results showed that spacing had a significant effect on plant height, diameter at breast height, the number of coppice stumps and biomass yield. Wider spacings resulted in greater plant height. The widest spacing (2 × 1 m) exhibited the higher stem diameter and sprout number than the narrow spacing. The narrowest spacing of 1 × 0.25 m spacing produced the highest total dry weight of leaf, woody stem and biomass yield. The spacing did not have an influence on the heating value and the content of H, N, S, Mg, Cl and ash. However, some of the chemical compositions show significant different with different spacings such as C, O, P, K and Ca content.

Keywords

Spacing; Diameter at Breast Height (DBH); Biomass; Renewable Energy

Conflicts of Interest

The authors declare no conflicts of interest.

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