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Penilaian Kualitas 3. Estimasi kandungan energi

Penilaian Kualitas 3. Estimasi kandungan energi. Eko Widodo. a. Imbangan C dan N. Tujuan: mengetahui jumlah protein dan lemak dalam tubuh Misal: Bahan Jumlah Nitrogen Karbon masuk keluar masuk keluar

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Penilaian Kualitas 3. Estimasi kandungan energi

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  1. Penilaian Kualitas3. Estimasi kandungan energi Eko Widodo

  2. a. Imbangan C dan N • Tujuan: mengetahui jumlah protein dan lemak dalam tubuh • Misal: Bahan Jumlah Nitrogen Karbon masuk keluar masuk keluar Makanan 6988g hay 56,4 -- 2831,7 -- 400g bk kelapa 21,9 -- 172,6 -- Ekskreta 16619gfeses -- 33,5 -- 1428,7 4357g urin -- 33,7 -- 132,2 4730g CO2 -- -- -- 1290,2 142g methan -- -- -- 46,6 Retensi 11,1 -- 46,6

  3. Perhitungan: Protein tubuh 16,65%N • Jml protein yg diretensi 11,1 x 100/16,65 = 66,66g • Jml C dalam protein 66,66 x 52,54/100 = 35g • Total C yang masih tersedia 46,6 – 35 = 11,6 • Lemak mengandung 76,5% C, jml lemak diretensi  11,6 x 100/76,5 = 15,2 Protein tubuh 52,54%C

  4. b. Bomb kalorimeter Gross energy Fecal energy (10-35% konsentrat) (20-60% hijauan) Digestible energy Urine + gaseous energy (5-12%GE) Metabolizable energy Heat increament Net energy Maintenance Production Total heat production

  5. Maintenance energy • Aktivitas bebas • Metabolisme basal • Panas untuk menjaga tubuh hangat • Energi untuk menjaga tubuh dingin

  6. Production energy • Pertumbuhan • Bulu • Telur • Susu • Wool • kerja

  7. 4. Penilaian kualitas protein • Non-ruminansia • protein efficiency ratio (PER) - syarat: konsumsi kalori harus cukup, kandungan protein cukup namun tidak berlebihan - kelemahan: asumsi kenaikan BB adalah proporsional thd konsumsi protein - spesifik untuk masing2 ternak

  8. b. Biological value (BV) • Protein yang diretensi tubuh N intake – (faecal N + urinary N) BVa = ----------------------------------------- x 100% N intake – faecal N

  9. N intake – (faecal N- MFN) – (urinary N EUN) BVt = -------------------------------------------------------- x 100%N intake – faecal N dimana: UEN : urinary endogenous N MFN : metabolic faecal N

  10. Contoh: • Konsumsi pakan 6000g • N dalam pakan 1,043% • N dalam urin 32800g • UEN 22g • MFN 10,7g • N dalam feses 20,9g 62,6 - (20,9 – 10,7) – (32,8 –22,0) BV = ----------------------------------------------x 100% 62,6 - (20,9 – 10,7) BV = 79% 1,043 x 6

  11. c. Replacement value (RV) (Ks N1 – KsN2) x 100 • RV = 100 - ------------------------------------ KsN1 dimana: KsN1 : keseimbangan N ransum test KsN2 : keseimbangan N ransum standar

  12. Contoh: • Intake N jagung 50g • Intake N telur 50 g • Keseimbangan N jagung = 19 (+19) • Keseimbangan N telur = 25 (+25) RV= 100 – {(25-19) x 100} 50 RV= 88%

  13. Protein Equivalent (PE) Digestible Crude Protein %DCP = CP intake – CP faeces x 100% CP intake • PE = {%DCP + %DTP}/2 • DTP: digestible true protein

  14. Chemical score • Without conducting animal experiment • Taking the first limiting amino acid • For example lysine content in egg and wheat were 7.2 and 2.7 percent respectively • So, the chemical score of wheat protein is 2.7/7.2 x 100 = 37 • Comparable to the values obtained by biological value for protein in pig, rats and humans but not with poultry.

  15. Essential amino acids index (EAAI) • EAAI= n 100a x 100b x ……100j A B J Dimana: n: the number of amino acids a,b,….j: percentage of essential aa in the food protein A,B, …J: percentage of essential aa in the standard egg protein

  16. Ruminansia a. Estimasi DCP (digestible crude protein) %DCP = (%CP x 0,9115) – 3,67 b. Percobaan keseimbangan N Positive N balance Negative N balance

  17. 5. Perhitungan Ekonomis • Jagung PK 9% EM 2980kcal/kg 2000/kg • Bk kelapa PK 21% EM 2200kcal/kg 1200/kg Harga per % PK Jagung = 2000/9 = 222,22 Bk kelapa = 1200/21 = 57,14 Harga per kcal EM Jagung = 2000/2980 = 0,671 Bk kelapa = 1200/2200 = 0,545

  18. Jagung 9% PK 2800kcal/kg EM 2000/kg • Tp ikan 60%PK 2400kcal/kg EM 10000/kg Bandingkan sb energi dan sb energi Sb protein dg sb protein

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