Abstract:
Biomass yields among 56 varieties/lines of leucaena were observed at Suwanvajokkasikit Field Crops Research Station located in Nakhonratchasima province. Completely randomized block design was used with three replications and 56 varieties/lines as treatments. Leucaena was harvested at two years of age and collected for Plant length, wood yield, branch yield, and leaf yield. Averaged Plant lengths ranged from 6.84 to 11.87 meters; the highest plant length was produced by KU19 (P<.01). Total biomass yields were in the range of 2.33 and 38.61 ton/rai; the highest biomass yield was found in KU38. For yield components i.e. wood yield, branch yield, and leaf yield, the top ten varieties/lines exhibiting the highest yield were reported. The top ten most wood yield-producing varieties/lines were KU38, KU45, KU19, KU14, KU18, KU43, KU41, KU58, KU53 and KU37, giving 33.38, 31.11, 29.66, 29.14, 28.08, 27.10, 26.95, 25.98, 25.37 and 25.24 ton/rai, respectively; whereas, the lowest wood yield (2.04 ton/rai) was shown in native leucaena (KU20). The ten varieties/lines producing the highest branch yield were KU1, KU56, KU61, KU15, KU19, KU45, KU17, KU38, KU18 and KU53 corresponding to 5.50, 4.33, 3.49, 3.41, 3.13, 3.02, 2.96, 2.87, 2.87 and 2.83 ton/rai respectively. Lastly, the first ten leaf yielders were KU15, KU56, KU1, KU61, KU45, KU17, KU58, KU18, KU53 and KU19 with 4.19, 3.97, 3.65, 3.20, 2.89, 2.72, 2.59, 2.56, 2.54 and 2.53 ton/rai recorded as leaf yield, respectively