<p>This research was aimed to investigate the effect of concentrate substitution with cassava plantation waste supplemented with cobalt and zinc in sheep ration. In vitro study was used in this experiment. Collected data were analyzed by Duncan’s test from Completely Randomized Design with four treatments and four replications. The experiment rations were R1 = 50% native grass + 50% concentrate, R2 = 50% native grass + 50% concentrate + 5 ppm cobalt + 30 ppm zinc, R3 = 50% native grass + 50% cassava plantation waste, R4 = 50% native grass + 50% cassava plantation waste + 5 ppm cobalt + 30 ppm zinc. The results showed that utilization of concentrate increased volatile fatty acid and N-NH3 concentration, and digestibility of dry and organic matter compared with cassava plantation waste. Volatile fatty acid and N-NH3 in sheep ration containing cassava plantation waste were still in normal range with dry and organic matter digestibility were up to 50%, but supplementation of cobalt and zinc had the same effect (P&gt;0.05). It is concluded that cassava plantation waste can be used as sheep feed, but did not substitute concentrate. Supplementation of cobalt and zinc was not effective to improve fermentability and digestibility of cassava plantation waste.</p><p><br />(Key words: Cassava plantation waste, Digestibility, In vitro, N-NH3, Sheep, Volatile fatty acid)</p>

Cassava processing into bioethanol potentially generates waste as animal feed

Field grass was a source of ruminant forage, especially for rural farmers in  the West Java in different altitude. The aim of this study was to determine the potential of grass during  the dry season which included the botanical composition analysis and chemical analysis of nutritional value. The study was conducted from September to November 2015. The method used was a survey method, sampling was multistage sampling. The parameters measured in the study included a botanical composition of the forage, biomass production of feed materials on fresh and dry matter, dry material content, an inorganic material included ash, calcium and phosphorus, protein, crude fiber, extract materials without nitrogen, and crude fat. The results showed that the areas in  the West Java were drought in September and October, thus resulting in very limited supply of forage and the productivity of the forages was very low. A botanical composition in the highland area was more complete included grass, legumes and weeds than lowland areas and medium altitude. Forage production in highland areas was higher than in lowland areas and medium altitude. Feed plants in the lowlands had a greater fiber content which was forming energy for plants, and lower crude protein when compared to highland

The study aimed to determine the effect of storage time on the physical characteristics of rice bran. The study was carried out by the experimental method using a randomized block design with 5 treatments and 4 replications. The treatments used were the length of storage, namely 0, 1, 2, 3, and 4 weeks. The variables observed were the physical properties of rice bran which included specific density, bulk density, and compact bulk density and moisture content. The collected data was analysis of variance (ANOVA) and continued with the Duncan’s test. The results showed that the storage time from week 0 to week 4 did not have a significant effect on the specific density, bulk density, and compact bulk density. The treatment of each other had a significant effect (P <0.05) increasing the rice bran moisture content. It was concluded that the length of storage increased the moisture content with the regression equation y = 1.0963X + 8.728 with R2 = 0.7602, r = 0.8719, but did not affect the physical characteristics of rice bran. Keywords: Density, Moisture Content, Physical Characteristics, Rice Bran, Storage Time

This research aimed to study the effect of protein and energy on Diet Use Efficiency of female Garut sheep. Four different treatments diets of different protein to TDN (energy) ration such as R1=11.53%:63.13%; R2=10.78%:70.06%; R3=13.54%:63.18%; and R4=13.67%:69.18% were allocated to 20 heads of female Garut sheep with 7-8 months old and average body weight 15.72 ± 1.33 kg. Completely randomized design was used and collected data was analyzed with Duncan's test. The results showed that highest diet use efficiency and protein consumption (P<0.05) were seen in R4 treatment, 13.09% and 94.04 g/day. Meanwhile, TDN consumption did not have any different among R4 (480.23 g/day), R2 (474.80 g/day), and R1 (446.77 g/day) but they were higher (P<0.05) than R3 (370.87 g/day). In other hand, TDN digestibility of R2 and R3 were higher than R1 and R3. In conclusion, protein to TDN ratio of 13.67%:69.18% resulted highest diet use efficiency.