Evaluation of Gliricidia sepium provenances in Ghana.
1988
Britwum, S. P. K.
In May 1985, thirteen provenances of G. sepium (including one local source) were tested in an alley cropping trial established with nursery grown seedlings at Kumasi, Ghana. Spacing was 50 cm between plants, which were established in single rows, with 4 m between rows. The soil was a well-drained yellow-red ochrosol (pH 5.8). In June 1985, maize was interplanted at 1.0 X 0.5 m spacings in 2 replications, and cowpeas at 0.8 X 0.25 m in 2 other replications. Manual weeding was done frequently. Cowpeas were harvested in August and maize in September. The trees were cut at 9 month old (March 1986) 50 cm above ground level, and 3 subsequent cuts were made at 2-month intervals. Records were made of height, diameter, numbers of branches and dry matter production up to the first cutting, and thereafter of coppice growth and dry matter yield after cutting. Leucaena leucocephala (Cunningham) was included for comparison. L. leucocephala was taller than all the G. sepium provenances, and had more branches, at 9 month old; there were variations between the G. sepium provenances in these 2 parameters, which were statistically significant for branch numbers, but not for height. The best coppice growth was found in those G. sepium provenances already superior in growth at 9 month old, and again, L. leucocephala performed well. The more branchy G. sepium provenances, as well as producing more coppice shoots, also gave the highest leaf biomass yields. Generally, leaf biomass yields were greater from G. sepium than from L. leucocephala.
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