The influence of time of planting and spacing on the production of fodder and fuelwood in associations of Calliandra calothyrsus and Pennisetum purpureum grown on contour bunds in the highlands of Burundi.
The best time to plant Calliandra calothyrsus in association with elephant grass (Pennisetum purpureum) and the appropriate in-row spacing of Calliandra for fodder and fuelwood production when grown on contour bunds were investigated in Burundi. Main plot treatments were elephant grass planted in Nov. 1988 and associated with Calliandra in Feb. 1989, Calliandra planted in Nov. 1988 and associated with elephant grass in Feb. 1989, and both species planted simultaneously in Nov. 1988. Sub-plot treatments were 3 within-row spacings of Calliandra. Survival of the species was not affected by time of planting. Total treatment yields of the second and third years were not influenced by the time of planting but lower yields of leaf and wood were obtained from the later-planted Calliandra. Total yields were not significantly influenced by the spacing, but leaf and wood yields of the Calliandra at the 25 cm spacing were greater than those at the 100 cm spacing, although not significantly different from those at the 50 cm spacing. Neither the time of planting nor the spacing of Calliandra affected the yield of maize or bean grown in the interbund areas. Simultaneous planting of Calliandra and elephant grass is recommended. Author's summary. KEYWORDS: TROPAG | Pennisetum purpureum | Calliandra calothyrsus | trees | Calliandra | fuelwood | feed crops | Pennisetum | spacing | planting date | agroforestry | BURUN.