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Ly et al., 2001. Livest. Res. Rural Dev., 13 (2): 1-9

Document reference 
Ly, J. ; Chhay Ty; Chiv Phiny, 2001. Evaluation of nutrients of rubber seed meal in Mong Cai pigs. Livest. Res. Rural Dev., 13 (2): 1-9
Abstract 

Three experiments were conducted to evaluate the nutritive value of Cambodian rubber (Hevea brasiliensis) seed meal either in vivo with young Mong Cai pigs or in vitro by the pepsin/pancreatin incubation procedure. The average weight of the seed was 3.29 ± 0.78 g and the proportion kernel/husk was 1.17 ± 0.40 g. The average composition of rubber seed meal was ash 3.10, NDF 53.8, crude fat 28.4 and N 2.39% in dry basis. The cyanide content of the seeds decreased from 82.5 to 29.3 mg/kg DM in approximately 45 days of storage. In vivo digestibility of nutrients of the feed (sugar palm syrup and dried fish) was not impaired by the introduction of either 17.8 or 40.5% of rubber seed meal in the diet. The balance of N was significantly better with 40.5% of the seeds in the diet than in rations with no rubber seed meal. Digestibility indices of rubber seed meal as estimated by difference were DM 79.4, NDF 75.0, N 83.6 and organic matter 85.5 %. In vitro digestibility studies indicated significantly (P<0.001) higher values for N utilization in the rubber seed kernel (89.7%) than in fish meal or dried fish (81.3 and 77.2%, respectively). In vitro DM and organic matter digestibility coefficients in the husk were comparatively low, probably due to the fibrous nature of this material.

Citation key 
Ly et al., 2001