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Green concentrate pellets composing 90% I. zollingeriana gave the best results in term of daily body weight gain, feed intake, nutrient degradability, efficiency of feed utilization, rumen fermentation in Boerka goats.

<p>This study aims to determine the physical quality and digestibility of green pellet concentrate based on <em>I.</em><em> zollingeriana</em>. The composition of green pellet concentrate feed contains <em>I. zollingeriana</em> and <em>C.</em><em> calothyrsus</em> in the following combinations: 1) <em>I.</em><em> zollingeriana</em> /<em>C.</em><em> calothyrsus</em> (90/0; R0), 2) <em>I.</em><em> zollingeriana</em>/<em>C. calothyrsus</em> (75/15; R1), 3) <em>I.</em><em> zollingeriana</em>/<em>C. calothyrsus</em> (60/30; R2) and 4<em>) I.</em><em> zollingeriana</em> / <em>C. calothyrsus</em> (45/45; R3). The physical quality study of green pellet concentrate was performed using a completely randomized design with four types of green concentrate as treatments of three replications. Green pellet concentrate studies conducted in vitro rumen fermentation were performed using in a  randomized block design with four treatments and three sources of liquid rumen as a block. The results of the experiments conducted with pellet criteria containing <em>I.</em><em> zollingeriana/C. calothyrsus </em>composition (60/30; R2) have the best physical character (water activity = 0.58; particles size = 12.69 mm; degree value angles = 21.01^o; collision endurance = 99.78%; endurance friction = 90.42 %; bulk density = 590 kg/m3) compared to the other treatments. The quality of diet based on digestibility in vitro, dry matter and organic material having a pattern equal to R0 is higher (P&lt;0.05) compared with other treatments, while the rough digestibility of In Vitro protein is seen R0, R1, and R2 (P&gt;0.05), but (P&lt;0.05) was higher than the treatment of R3. There was no difference of pH and total bacteria on green pellet concentrate type. The treatment of R3 has the lowest NH3, VFA and total gas concentration (P&lt;0.5) compared with R2, R1 and R0. It was concluded that concentrate green pellet of <em>I.</em><em> zollingeriana</em> composition (60%) and <em>C.calothyrsus</em> (30%) had better physical and nutritional quality.</p>

Low digestibility and toxicity of hydrocyanic acid (HCN) in sorghum forage are disadvantage for ruminant. Appropriate fertilizer application and planting strategy can improve sorghum yield and quality. A field experiment was aimed to investigate the productivity, nutrients content, and HCN concentration of Super-2 forage sorghum (Sorghum bicolor (L) Moench) at different planting spaces and levels of NPK fertilizer. The seeds were planted according to 3×3 factorial design in which the first factor was planting space (J1= 90×20 cm, J2= 75×25 cm, and J3= 60×30 cm) and the second factor was three levels of NPK fertilizer (P1= 0 kg/ha; P2= 100 kg/ha; and P3= 200 kg/ha, respectively). Crude protein (CP), crude fiber (CF), and HCN concentration were affected by the interaction of NPK levels × planting spaces (p<0.05). The CP and HCN content increased as NPK levels increased at all planting space patterns while CF content decreased. NPK fertilizer application significantly increased yield production (DM, OM, and CP productions), whereas planting space treatment did not show any improvement except for CF that significantly lower on 60×30 cm planting space. Sorghum receiving 200 kg/ha of NPK at 60×30 cm planting space produced the highest CP and the lowest CF content, resulting in the highest OM and CP biomass production. In conclusion, NPK fertilizer significantly improved productivity and nutrients composition and in the same way, also increased HCN concentration of sorghum Super-2 varieties.