1. Kelleher, B.P., Leahy, J.J., Henihan, A.M., O'dwyer, T.F., Sutton, D. and Leahy, M.J., 2002. Advances in poultry litter disposal technology–a review. Bioresource technology. 83(1): 27-36. https://doi.org/10.1016/S0960.8524(01)00133-7 [DOI]

2. Abelha, P., Gulyurtlu, I., Boavida, D., Barros, J.S., Cabrita, I., Leahy, J. and Leahy, M., 2003. Combustion of poultry litter in a fluidised bed combustor. Fuel. 82(6): 687-692. https://doi.org/10.1016/S0016-2361(02)00346-6 [DOI]

3. Qian, X., Lee, S., Chandrasekaran, R., Yang, Y., Caballes, M., Alamu, O. and Chen, G., 2019. Electricity evaluation and emission characteristics of poultry litter co-combustion process. Applied Sciences. 9(19): 4116. https://doi.org/10.3390/app9194116 [DOI]

4. Azizi-Shotorkhoft, A., Rezaei, J. and Fazaeli, H., 2013. The effect of different levels of molasses on the digestibility, rumen parameters and blood metabolites in sheep fed processed broiler litter. Animal Feed Science and Technology. 179: 69-76. https://doi.org/10.1016/j. anifeedsci.2012.10.015 [DOI]

5. Rankins, Jr, D.L., Eason, J.T., McCaskey, T., Stephenson, A.A.H. and Floyd, Jr.J.G., 2002. Nutritional and toxicological evaluation of three deep stacking methods for the processing of broiler litter as a foodstuff for beef cattle. Animal production. 56: 321-326. https://doi.org/10.1079/APJ20010189

6. Noland, P.R., ford, B.F. and ray, M.I., 1955. The use of ground chichen litter as source of nitrogen for gestatin lactating ewes and fattning streers. Journal of Animal Science. 14: 860.

7. Van Ryssen, J.B.J., 2001. Poultry litter as a feedstuff for ruminants: a South African scene. South African Journal of Animal Science. 2: 1-8. https://doi.org/10.4314/sajas.V 31i2.15582 [DOI]

8. Moshtaghi Nia, S.A. and Ingalls, J.R., 1995. Evaluation of moist heat treatment of canola meal on digestion in the rumen, small intestine, large intestine and total digestive tract of steers. Canadian Journal of Animal Science. 75: 279-283. https://doi.org/10.4141/cjss95-042 [DOI]

9. Hopkins, B.A. and Poore, M.H. 2001. Deep-Stacked broiler litter as a protein supplement for dairy replacement heifers. Journal of Dairy Science. 84(1): 299-305. https://doi.org/10.3168/jds.S0022-0302(01)7447 4-0 [DOI]

10. Salehtarigh, A., 2009. Effect of heat treatment on microbial count and nutritive value of broiler litter with or without molasses. M.Sc. dissertation, Azad University of Pishva-Varamin. (In Persian)

11. McDonald, P., Edwards, R.A., Greenhalgh, J. F.D. and Morgan, C.A., 2002. Animal Nutrition. 6th ed. Harlow, UK: Pearson Education Inc.

12. AOAC International. 2003. Official methods of analysis of AOAC International. 17th edition. 2nd revision. Gaithersburg, MD, USA, Association of Analytical Communities.

13. Van Soest, P.J., Robertson, J.B. and Lewis, B.A., 1991. Methods of dietary fiber, neutral detergent fiber and non starch poly-saccharides in relation to animal nutrition. Journal of Dairy Science. 74(10): 3583-3597. https://doi.org/10.3168/jds.S0022-0302(91)78551-2 [DOI]

14. Broderick, G.A. and Kang, J.H., 1980. Automated simultaneous determination of ammonia and total amino acids in ruminal fluid and in vitro media. Journal of Animal Science. 63: 64-75.

15. Menke, K.H., Raab, L., Solewski, A., Steingass, H., Fritz, D. and Schneider, W., 1979. The estimation of the digestibility and metabolisable energy content of ruminant feeding stuffs from the gas production when they are incubated with rumen liquor in vitro. Journal of Agriculture science. 93: 217-222. https://doi.org/10.1017/ S002185960004944X [DOI]

16. Orskov, E.R. and McDonald, I., 1979. The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage. Journal of Agriculture Science. 92: 499-503. https://doi.org/10.1017/S0021859600048688 [DOI]

17. Makkar, H.P.S., 2004. Recent advances in the invitro gas method for evaluation of nutritional quality of food resource. In: Assessing Quality and safety of animal feeds. FAO Animal production and health series 160. Rome, Italy: FAO. 55-88.

18. Menke, K.H. and Steingass, H.H., 1988. Estimation of the energetic feed value obtained from chemical analysis and in vitro gas production using rumen fluid. Journal of animal research and development. 28 p.

19. SAS. 2003. SAS User’s Guide Statistics. Version 9.1 Edition. Cary, NC: SAS Inst., Inc.

20. Theodorou, M.K., Williams, B.A., Dhanoa, M.S., McAllan, A.B. and France, J., 1994. A simple gas production method using a pressure transducer to determine the fermentation kinetics of ruminant feeds. Animal Feed Science and Technology. 48: 185-197. https://doi.org/10.1016/0377-8401(94)90171-6 [DOI]

21. Getachew, G., Depiters, E.J. and Robinson, P.H. 2002. In vitro gas production provides effective method for assessing ruminant feeds. California Agriculture. 58: 54-58. https://doi.org/10.3733/ca.v056n02p54 [DOI]

22. Blummel, M. and Becker, K., 1997. The degradability characteristics of fifty-four roughages and roughage neutral-detergent fibers as described by in vitro gas production and their relationship to voluntary feed intake. British Journal of Nutrition. 77: 757-768. https://doi.org/10.1079/BJN19970077 [DOI]

23. Wang, Z.S. and Goetsch, A.L., 1998. Intake and digestion by Holstein steers consuming diets based on litter harvested after different numbers of broiler growing periods or with molasses addition before deeps tacking. Journal of Animal Science. 76: 880-887. https://doi.org/ 10.2527/1998.763880x [DOI]

24. Suppadit, T., 2005. The recycle of broiler litter as a feed ingredient for cattle to reduce environmental pollution III. Safe use of broiler litter as a feed ingredient source. Thai Environmental Engineering Journal. 9: 22-34.

25. McDonald, P., Edwards, R.A., Greenhalgh, J.F.D. and Morgan, C.A., 2002. Animal Nutrition. 6th ed. Harlow, UK: Pearson Education Inc.

26. Caswell. L.F., Fontenot, J.P. and Webb, Jr, K.E., 1978. Fermentation and utilization of broiler litter ensiled at different moisture levels. Journal of Animal Science. 46(2): 547-560. https://doi.org/10.2527/jas1978.462547x [DOI]

27. Sommart, K., Parker, D.S., Rowlinson, P. and Wanapat, M., 2000. Fermentation characteristics and microbial protein synthesis in an in vitro system using cassava, rice straw and dried ruzi grass as substrates. Asian-Australasian Journal of Animal Sciences. 13: 1084-1093. https://doi.org/10.5713/ajas.2000.1084 [DOI]

28. Spoelstra, S.F., Steg, A. and Beuvink, J.M.W., 1990. Application of cell wall degrading enzymes to grass silage. In: Dekkers, H.C., Van der, P. and Vuijk, D.K., (Eds.), Agricultural Biotechnology in Focus in The Netherlands, unknown. Wageningen, The Netherlands: Puck.

29. Wolin, M.J., 1960. A theoretical rumen fermentation balance. Journal of Dairy Science. 43: 1452-1459. https://doi.org/10.3168/jds.S0022-0302(60)87019-3 [DOI]

30. Fontenot, J.P., Daeke, C.L., McClure, W.H., Mc Claugherty, F.S., Bhattacharya, A.N., Kelly R.F. and Litton, G.W., 1964. The value of poultry litter as a feed for ruminants. Blacksburg, VA: Virginia Agricultural Experiment Station. 37 p.

31. Deshck, A., Abo-Shehada, M., Allonby, E., Givens, D.I. and Hill, R., 1998. Assessment of the nutritive value for ruminants of poultry litter. Animal Feed Science and Technology. 73: 29-35. https://doi.org/10.1016/S0377-8401(98)00115-0 [DOI]

32. Bolan, N.S., Mahimairaja, S., Singh, J. and Bhandral, R., 2005. The beneficial use and the environmental management of poultry litter. Institute of Natural Resources, Massey University, Palmerstone, North New Zealand.

33. O’Hara, M., Hozumi, S. and Ohki, K., 1974. Studies on the mode of gas production in artificial rumen and its application to the evaluation of feedstuffs. IV. On the rule of bicarbonate buffer for the gas production. The Japanese journal of zootechnical science. 45: 1-7.

34. Blummel, M., Makkar, H.P.S. and Becker, K., 1997. In vitro gas production: a technique revisited. Journal of Animal Physiology and Animal Nutrition. 77: 34-24. https://doi.org/10.1111/j.1439-0396.1997.tb01002.x [DOI]

35. Tymchuk, S.M., Khorasani, G.R. and Kennelly, J.J., 1998. Effect of feeding formaldehyde- and heat-treated oil seed on milk yield and milk composition. Canadian Journal of Animal Science. 78: 693-700. https://doi.org/10.4141/cjss98-105 [DOI]

36. Danesh-Mesgaran, M., Fathi-Nasri, M.H. and Valizadeh, R., 2006. Chemical composition, degradability coefficients and ruminal-intestinal disappearance of crude protein of whole raw or heated Canola seed in Holstein steers. Sciences and Agricultural industry. 1: 181-190. (In Persian)

37. Chaudhry, S.M., Fontenot, J.P., Naseer, Z., Ali, C.S., 1996. Nutritive value of deep stacked and ensiled broiler litter for sheep. Animal Feed Science and Technology. 57: 165-173. https://doi.org/10.1016/S0377-8401(96)01016-5 [DOI]

38. Hurrell, R.F. and Finot, R.A. 1985. Effect of food processing on protein digestibility and amino acid availability. In: Finley, J.W. and Hopkins, D.T., (Eds.), Digestibility and amino acid availability in cereals and oilseeds. 233-258. St Paul, MN: American Association of Cereal Chemists.

39. Stanley, D.W., 1990. Protein reactions during extrusion Processing. In: Extrusion cooking. 321-336. Guelph, Ontario, canada: Department of Food Science University of Guelph.

40. Beltiz, H.D. and Grosch, W., 1987. Reaction involved in food chemistry. Berlin, Germany: Springer Verlag.

41. Mc Kinnon, J.J., Olubobokoun, J.A., Chistensen, D.A. and Cohen, R.D.H.., 1991. The influence of heat and chemical treatment on ruminal disappearance of canola meal. Canadian Journal of Animal Science. 71: 773-780. https://doi.org/10.4141/cjss91-096 [DOI]