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Evaluation of Gliricidia sepium provenances for alley cropping in Malawi

Evaluation of Gliricidia sepium provenances for alley cropping in Malawi

Forest Ecology and Management 64(2-3): 191-198

Nine provenances of Gliricidia sepium were evaluated to identify the most productive when managed under alley cropping at Kawinga in Machinga, Malawi. Individual provenances constituted plots arranged in randomized block design with six replications. One year after establishment, survival of the provenances ranged between 82 and 97%, whereas height and diameter varied between 1.6 and 2.2 m and 16.7 and 23.5 mm respectively. Wood basic density ranged between 393 and 450 kg m-3, whereas average above ground biomass for the 3 year period varied between 7.0 and 10.9 t ha-1 per year. Foliar nutrient content varied from 2.58 to 3.15% (nitrogen), 0.17 to 0.20% (phosphorus), 0.98 to 1.77% (potassium), 1.56 to 2.97% (calcium), 0.67 to 2.55% (magnesium) and 0.04 to 0.05% (sodium). Although biomass production between provenances varied significantly only at certain lopping stages, within-provenance variations were noticed throughout in all the traits assessed. Such variations indicate that both provenance and individual tree selection methods can be used in the genetic improvement of G. sepium for specific agroforestry uses. The overall most productive provenances were Retalhuleu (14/84), Pontezuela Bolivar (24/86), Volcan Suchitan (13/84) and Francisco (37/85) provenances. These provenances are therefore recommended for further testing to address appropriate agroforestry requirements in different agroecological zones.

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Accession: 002374328

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DOI: 10.1016/0378-1127(94)90293-3

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