Evaluation of growth of gliricidia sepium provenances at Gairo, Kibaha and SUA farm, Tanzania
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Date
2003
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Sokoine University of Agriculture
Abstract
Growth evaluation was conducted among seventeen provenances of Gliricidia
sepium at Gairo, Sokoine University of Agriculture (SUA) farm and Kibaha,
Tanzania. Assessment was done at irregular intervals for survival, root collar
diameter and diameter at 30 cm above the ground, height, multiple stems production.
foliage and wood and total biomass production. Final assessment of these tree
attributes was done at 70, 69 and 34 months after planting for Gairo, SUA farm and
Kibaha site respectively while unit leaf mass, foliar N and P concentrations was
assessed at 73, 72 and 36 months after planting for Gairo. SUA farm and Kibaha site
correspondingly. For SUA farm site, during the final assessment occasion, height
ranged from 3.77 (Taxico) to 4.85 m (Belen Rivas), foliar N concentration ranged
from 3.58 (Taxico) to 4.24% (Thailand) while P concentration ranged 0.16 (Playa
Tamarindo) to 0.19% (Gualan). Multiple stems production ranged from 15000
(Cuyatenango) to 28750 stems ha'1 (sph) (Thailand) while biomass yields were 17.34
(Retalhuleu) to 27.73 t ha'1 (Belen Rivas), 72.99 (Retalhuleu) to 118.54 t ha'1 (Belen
Rivas) for foliar and wood biomass respectively. For Gairo site, height ranged from
3.87 (Monterrico) to 4.39 m (Cuyatenango), foliar N concentration ranged from 3.68
(Kihonda) to 4.38% (Cuyatenango) while P concentration ranged 0.26 (Kihonda and
Taxico) to 0.30% (Balen Rivas). Multiple stems production ranged from 27500
(Cuyatenango and Monterrico) to 33438 sph (Retalhuleu) while biomass yields were
13.72 (Monterrico) to 18.68 t ha'1 (Cuyatenango) and 60.76 (Monterrico) to 95.15 t
ha'1 (Cuyatenango) for foliar and wood biomass respectively. For Kibaha site, heightiii
ranged from 4.45 (Nigeria) to 5.26 m (Jutiapa), foliar N concentration ranged from
3.69 (Ibadan) to 3.93% (Jutiapa) while P concentration ranged from 0.20 (Ibadan) to
0.24% (Taxico). Multiple stems production ranged between 16563 (Jutiapa) to 22031
sph (Nigeria) while biomass yields were 15.45 (Nigeria) to 20.19 t ha'1
(Cuyatenango), 37.26 (Nigeria) to 49.15 t ha'1 (Cuyatenango) for foliar and wood
biomass respectively. Based on the findings, provenances Balen Rivas. Cuyatenango
and Juliapa arc recommended for SUA farm: Cuyatenango and Taxico for Gairo: and
Cuyatenango and Jutiapa for Kibaha. Further evaluation of these and other
provenances on resistance to pests and disease, nitrogen fixation and coppicing
ability for various conditions in Tanzania are recommended. In addition, more
studies to compare performance of other G. sepiuni provenances in more contrasting
sites should be undertaken.
Description
Dissertation
Keywords
Growth evaluation, Gliricidia sepium, Biomass production, SUA farm