The experiment was conducted from March 2023 to June 2023 at a livestock farm in Phung
Hiep district, Hau Giang province. It aimed to evaluate the impact of Fermented Total Mixed
Ration (FTMR), mixed from young jackfruit, on feed nutrient consumption and weight gain in
crossbred Boer goats. Twelve male Boer crossbred goats (Boer×BachThao), aged 3-4 months and
weighing 22.17±3.84kg, were used in the study. The experiment was arranged using a completely
randomized design, which involved four treatments incorporating four different levels of FTMR
addition: 0, 25, 50, and 75%, specifically designated as 0FTMR, 25FTMR, 50FTMR, and 75FTMR.
Each treatment was replicated three times, with every replication involving a male goat. The FTMR
formula included the following ingredients: young jackfruit, ground corn, rice bran, extracted
soybean, copra meal, urea, mineral premix, and salt. The results showed that feed intake, ether
extract (EE), crude protein (CP) intakes and total intake (%DM/body weight) were significantly
different (Pgrass decreased from 417.41 to 162.18g DM/head/day among the FTMR-supplemented treatments
(Pat 25FTMR (78.24g DM/head/day) (Pto 670.87 g/head/day and 16.24 to 30.29 g/head/day, respectively (P>0.05). The CP intake increased
with the rate of FTMR addition, the highest at 75FTMR (86.02 g/head/day) and lowest at 25FTMR
(49.70 g/head/day), but 0FTMR had a CP value of 51.41g DM/head/day (Pbody weight) in the 0FTMR, 25FTMR, 50FTMR treatments, and 75FTMR reached 2.58, 2.53, 2.63
and 2.88%. The metabolizable energy (ME) intake (MJ/head/day) improved for 50FTMR (5.81 MJ)
and 75FTMR (6.42 MJ) compared to 0FTMR (5.47 MJ), but it decreased for 25FTMR (5.10 MJ). The
live weight gains (LWG) (g/head/day) of the goats were 88.89; 122.22; 116.67; and 105.56 for 0FTMR,
25FTMR, 50FTMR and 75FTMR treatments, respectively (Pimproved with the addition of FTMR at 25% (4.69kg DM/kg body weight) and 50% (5.58kg DM/
kg body weight) compared with 0% FTMR (6.80kg DM/kg body weight) (P>0.05). The findings
suggest that adding 25% FTMR to the diet enhances the nutritional value, weight gain, and FCR of
crossbred Boer goats.