performance and parasite infestation of goats given cassava leaf
silage (or sun-dried cassava leaves) as supplement to grazing in
lowland and upland regions of Cambodia
Bunyeth and Preston T R 2006.
Research for Rural Development. Volume 18, Article # 28.
The experiment was conducted in two communities: in the lowland
area (Ogna Ong village) along the Mekong river bank, and in the
upland area of Pursat province, Northwest of Cambodia. The study
was 3 months in the wet season, starting on August 1, 2004.
Twenty four families, 12 in each of the lowland and 12 in upland
areas were selected. Each farmer received 2 goats of about 4
months of age. The treatments were arranged as a 3*2 factorial
with 4 replications. The main effects were: supplementation (EC:
Ensiled cassava foliage, DC: Dried cassava foliage; NG: Natural
grass); Region (L: Lowland, U: Upland). The goats were managed
in the traditional system of free grazing (from 8.00am to 4.00
pm), with nighttime confinement in a shed with raised floors
where they were offered the forage supplements ad libitum. They
were vaccinated against Foot and Mouth Disease and they were
also de-wormed. Every farmer planted cassava in a plot of 100m2
and additional cassava leaves were purchased from neighboring
farmers and either ensiled or sun-dried in quantities sufficient
to supply half the needs of the experiment. The live weight of
the goats was measured every two weeks, in the morning before
grazing. Intake of supplements was recorded every day and
samples retained for analysis. Dry matter (DM) was determined by
micro-wave radiation (Undersander et al., 1993) and N and ash by
methods of AOAC (1990). Samples of faeces were taken every month
directly from the rectum of the goats, for determination of
faecal egg counts (FEC), according to the method of Hansen and
The experiment was an on-farm trial, conducted from 1st August
to 31st October, 2004 (wet season) in two communities, one in
the lowland region along the Mekong river bank and the other in
an upland region in Pursat province. A factorial design (3*2)
was used to compare supplements of cassava foliage in ensiled
form (EC), cassava foliage in dried form (DC) and natural grass
(NC). Growth rate was higher in the upland (55.3g/day) than in
the lowland region (34.7g/day). Supplementation with EC
(63g/day) was more effective than DC (34g/day) and NG (37g/day).
DM intake with supplement of EC (349g/day) was higher than DC
(201g/day) and NG (126). There was a positive relationship
between growth rate and supplement intake (R2= 0.53). Faecal egg
counts (FEC) were higher in goats in the lowland than in the
upland region. In the lowland region there was an indication of
lower FEC in goats supplemented with EC compared with DC or NG.
It is concluded that cassava foliage, especially in ensiled
form, can play an important role in supporting good growth
performance as well as providing some protection against
nematode infestation of goats at small household farming level.