Bwa-yo - Société Audubon Haiti

Lisina... Delen 129
Table 15.4 Dry biomass yields of Leucaena species in hedgerow and alley cropping trials in
Haiti. The harvest period indicated is the time from establishment to the last harvest. Yields
are equivalent to the sum of the individual harvests,which includes the initial seedling harvest.
SPECIES DENSITY NO. OF HARVEST DRY LEAF DRY WOOD SITE
(trees m· l ) HARVESTS PERIOD YIELD YIELD
(months) (kgm· l ) (kgm· l )
L. diversifolia K156 2 4 28 4.6 6.5 Bab Panyo1
(1988-1991)
L. leucocephala K8 2 4 28 4.8 8.2 Bab Panyo1
(1988-1991)
L. diversifolia K156 10 3 23 0.7 1.1 Bergeau, Cayes
(1991-1993)
L. diversifolia x L. 10 3 23 2.0 3.6 Bergeau, Cayes
leucocephala hybrid (1991-1993)
(KX3)
L. leucocephala K636 10 3 23 2.0 3.8 Bergeau, Cayes
(1991-1993)
L. salvadorensis 10 23 0.1 0.2 Bergeau, Cayes
(1991-1993)
L. shannonii 10 3 23 0.7 1.5 Bergeau, Cayes
(1991-1993)
L. diversifolia K156 10 3 24 0.9 1.2 Ft. Jacques
(1991-1993)
L. diversifolia x L. 10 3 24 1.1 1.7 Ft. Jacques
leucocephala hybrid (1991-1993)
(KX3)
L. leucocephala K636 10 3 24 0.8 1.7 Ft. Jacques
(1991-1993)
L. diversifolia K156 10 2 23 0.2 0.3 St. Georges
(1991-1993)
L. diversifolia x L. 10 2 23 0.6 0.8 St. Georges
leucocephala hybrid (1991-1993)
(KX3)
L. leucocephala K636 10 2 23 0.8 1.6 St. Georges
(1991-1993)
L. salvadorensis 10 2 23 0.3 0.5 St. Georges
(1991-1993)
L. shannonii 10 2 23 0.1 0.2 St. Georges
(1991-1993)
source of giant leucaena was brought to Haiti. A seed lot from Choluteca, Honduras,
OFI 19/81, was established at 5 locations in the country as part of the OFI dry zone
species trials. Also included in the trials was the introduction of 2 new Leucaena
species: L. shannonii subsp. shannonii and L. collinsii subsp. zacapana. Neither species
outperformed the survival and height growth ofL. leucocephala subsp. glabrata, though
local farmers soon noted the difference in wood qualities and seed production.
In 1988, International Resources Group introduced K636, K605, and K584, along
with the interspecific hybrid KX3, a cross between L. diversifolia subspecies diversifolia
and L. leucocephala. These were established in seed-production stands and isolated
varietal blocks throughout sites in Haiti, from sea level to 1500 m (Fig. 15.11). The
stands were culled of individuals exhibiting early flowering and inferior form charac-