DEGRADASI IN SACCO BAHAN ORGANIK DAN PROTEIN KASAR EMPAT SPESIES RUMPUT TROPIK

MAKHSUD, USMAN , Dr. Ir. Hapi Haptari, M.Sc

1986 | Skripsi | S1 ILMU DAN INDUSTRI PETERNAKAN

DEGRADASI IN SACCO BAHAN ORGANIK DAN PROTEIPk KASAR EMPAT SPESIES RUMPUT TROPIK Usman Makhsud NIM : 89/74295/PT/02561 INTISARI Penelitian ini bertuduan untuk mengetahui degradasi bahan organik (BO) dan protein kasar (PK) secara in sacco dari empat denis rumput. Penelitian dilakukan menggunakan tiga ekor sapi Peranakan Friesian Holstein yang difistula pada bagian rumennya, diberi ransum terdiri dari Pennisetwn purpureum (PK 9%) dan konsentrat (PK 16%) dengan imbangan 70%:30%. Empat denis rumput Panicum maximum, Setaria sphacelate, Cynodon dactylon dan Brachiaria mutica yang diinkubasikan dalam rumen selama 2, 4, 8, 16,. 24 dan 48 dam, dan setiap waktu inkubasi dengan 6 kali ulangan. Residu pakan setelah inkubasi dianalisis kandungan BO dan PK. Data yang diperoleh berupa kinetik kehilangan BO dan PK digunakan untuk menghitung nilai a, b dan c dengan model eksponensial, p = a + b ( 1—e~ ), dengan a = fraksi yang mudah larut, b = fraksi yang potensial terdegradasi dan c = ladu degradasi fraksi b. Nilai a, b, dan c yang diperoleh dan ladu partikel pakan keluar rumen (kp) = 0,06, digunakan untuk menghitung degradasi teori (DT), DT = a + (bc/(c+0,06)). Data yang diperoleh dianalisis statistik. Hasil penelitian menundukkan bahwa terdapat perbedaan sangat nyata (P<0,01) fraksi a, b, c dan DT dari BO dan PK. Degradasi BO Setaria sphacelata adalah tertinggi (41,66%) dan tidak berbeda nyata dengan Cynodon dactylon dan Brachiaria mutica (39,16 dan 39,95%). Degradasi BO Panicum maximum paling rendah dibanding lainnya (33,20%). Degradasi PK Cynodon dactylon lebih tinggi (62,24%) dan berbeda nyata dengan Panicum maximum dan Brachiaria mutica ( 56,89 dan 58,35%), tetapi tidak berbeda nyata dengan Setaria sphacelata (60,78%). Hasil penelitian menundukkan terdapat perbedaan BO dan PK empat denis rumput. (Kata Kunci : Degradasi, In Sacco, Rumput Tropik, Bahan Organik, Protein Kasar)

IN SACCO DEGRADATION ORGANIC MATTER AND CRUDE PROTEIN OF FOUR TROPICAL GRASSES SPECIES Usman Makhsud NIM 89/74295/PT/02561 ABSTRACT The experiment was conducted to determine the orga- nic matter (OM) and crude protein (CP) degradation of tropical grasses in the rumen . In this experiment three rumen cannulated Friesian Holstein cows were used. The cows were fed Elephant grass (Pennisetum purpureum)(CP:9%) and concentrate (CP:16%) at the ratio of 70% : 30%, to meet their daily maintenance requirements. Four grasses , namely Panicum maximum, Setaria sphacelata, Cynodon dacty- lon and Brachiaria mutica, samples were put in nylon bag and incubated in the rumen for 2, 4, 8, 16, 24 and 48 hours. Each sample was replicated six (6) times. The residues after incubation were analyzed for OM and CP , and the results were used to calculate the fraction that immediately degraded (a), fraction of slowly degraded (b), and the rate of degradation of fraction slowly degraded (c), according to formula of p = a + b (l-exp-c^), where p is material degraded at time t. The values of fraction ob- tained were then used to calculate teoritical degradation (DT) according formula DT = a + bc/(c+.06). The results showed that DT of OM and CP were significantly different (Pc.01) among grasses. DTOM of Setaria sphacelata was the highest (41.66%) but not significantly different with Cynodon dactylon and Brachiaria mutica (39.16 and 39.95%), while Panicum maximum was the lowest (33.12%). DTCP of Cynodon dactylon (62.24%) was significantly higher (Pc.01) than Panicum maximum and Brachiaria mutica (56.89 and 58.35%) but not differ to Setaria sphacelata (60.78%). There were variation of OM and CP degradation between grasses. (Key Words : Degradation, In Sacco, Tropical Grasses, Organic Matter , Crude Protein)

Kata Kunci : Degradasi, In Sacco, Rumput Tropik, Bahan Organik, Protein Kasar