Growth performance of lesser-knownLeucaenaspecies/provenances at Gairo inland plateau, Morogoro, Tanzania

Abstract

Growth performance and psyllid resistance was studied among nineteen lesser-known Leucaena species/provenances at Gairo inland plateau, Morogoro, Tanzania. Assessment was done at irregular intervals for survival, root collar diameter and diameter at 30 cm above the ground, height, diameter at breast height, multiple stems production, biomass and psyllid resistance. Final assessment of these tree attributes was done at 37 months after planting, while psyllid resistance was assessed at 9 and 37 months after planting. During the final assessment occasion, height ranged from 2.69 m for L. collinsii Ex. Chiapas to 4.87 m for L. diversifolia Ex. Veracruz. Diameter at breast height (Dbh) ranged from 2.26 cm for L. shannonnii Ex. Chiapas to 4.93 cm for L. diversifolia Ex. Veracruz, while multiple stems production ranged from 2709 stems ha−1 for L. pulverulenta Ex. Tamaulipas to 7135 stems ha−1 for L. leucocephala Ex. Morogoro and untransformed survival ranged from 43.75% for L. pulverulenta Ex. Tamaulipas to 100%...