This research aimed is to evaluated post fermented protein concentrate from jatropha seed cake by using it as feed and the effect on blood metabolite of post weaned Rex rabbits (Oryctolagus cuniculus). Variables investigated were feed consumption and blood metabolite profiles (triglycerides and glucose). Analysis of variance showed significant effect on feed consumption and level blood glucose (P < 0.05), but not on blood triglyceride of post weaned Rex rabbit (P > 0,05). Based on feed intake and blood metabolite profiles, the experiment resulted that soybean meal can be substituted with protein concentrate from jatropha seed cake as a feed of post weaned Rex rabbits.

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Kebumen district is one of beef development centers in Central Java that requires numerous forage supplies (HPT). Farmers without personal foraging area have to buy forages almost on a daily basis. Forage business is an emerging and prospective business sector to improve farmers’ welfare particularly the income. Government is therefore expected to support in terms of facility and infrastructure to maintain a sustainable business practice.  The aim of this study was to investigate the necessity of forage business in cattle development center in Kebumen district, forage marketing channel, forage business revenue, profit margin, R/C ratio and government support in terms of infrastructure or policy related to forage business.

The purpose of this study is to assess the optimization of fermentation process by adding a minerals and amino acids so that the potential of protein  of Concentrate Protein-Jatropha seed cake (CP-JSC) can be optimally used as a substitute for soybean meal. The method used was completely randomized design. The treatment consisted of F1: Fermentation CP-BBJ + methionine-lysine (0.25%: 0.25%), F2: Fermentation CP-JSC + methionine-lysine (0.5%: 0.5%), F3: F1 + 0.45% Dicalsium Phosphate, F4: F2 + 0.45% Dicalsium Phosphate. Each treatment was repeated four times, When treatment significantly continued by Least Significant Difference (LSD), variables observed are the levels of antinutrients (phorbolester, antitrypsin), the levels of nutrients (fat, protein, crude fiber, Ca, P and gross energy) and amino acid. Results of analysis of variance showed that the addition of amino acids and minerals Ca, P in the fermentation process was highly significant effect on the levels of crude fiber and phosphorus (P <0.01) and significantly affected the gross energy content of CP-JSC post-fermentation (P <0.05). Dry matter, crude protein, crude lipid and calcium  are not affected by supplementation of methionine and lysine as well as calcium and phosphorus. Supplementation of methionine and lysine in the fermentation substrate showed good levels of essential amino acids and non essential higher than previous studies although not statistically significant (P> 0.05). While the levels obtained phorbolester range of 0.055% - 0.08%. It was concluded that the optimization of fermentation can be done without adding the amino acid supplementation of minerals calcium and phosphorus. Supplementation significantly affect a significant increase or decrease in some nutrients (crude fiber, gross energy, phosphor) and capable of suppressing a decrease in amino acids. Supplementation of amino acids Lysine and Methionin 0.05% is the best treatment.