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Evaluation of Methods for Determination of Bulk Density of Eight Kinds of Forage under Air-dry and Wet Conditions
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 Title & Authors
Evaluation of Methods for Determination of Bulk Density of Eight Kinds of Forage under Air-dry and Wet Conditions
Sekine, J.; Kamel, Hossam E.M.; El-Seed, Abdel Nasir M.A. Fadel; Hishinuma, M.;
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 Abstract
The conditions of measurement for the determination of bulk density were evaluated to assess the bulkiness of 8 kinds of forage. The bulkiness of the forages was determined with 4 different sizes of forage samples with 7 different pressure application under air-dry and wet conditions. The dry bulk density (DBD) curvilinearly regressed with the pressure applied. The particle size of the samples and kinds of forage used in the present study did not affect changes in values of DBD determined under pressures over up to . The values of the wet bulk density (WBD) increased as an increment of particle size, but were not always regressed on the particle size of the 8 kinds of forage. The DBD determined on 8 mm particles showed a higher correlation coefficient with neutral detergent fiber (NDF) contents. The DBD may be a useful tool for the assessment of NDF in forage, when it is determined under condition of a pressure of or over with a particle size of 8 mm. The WBD may not be utilized for the direct measurement of the physical characteristics of forage, but may be required a thorough consideration on water solubility of forages. Further studies are needed to clarify the DBD contribution to the prediction of forage intake by ruminants.
 Keywords
Forage;Dry Bulk Density;Wet Bulk Density;Ruminants;
 Language
English
 Cited by
 References
1.
Analytical Software, 2000. Statistix7 User's Manual. Analytical Software, Tallahassee FL. USA.

2.
Association of Official Analytical Chemists. 1984. Official Methods of analysis of the AOAC. 14th ed. Washington DC. U.S.A.

3.
Baile, C. A. and W. H. Pfander. 1967. Ration density as afactor controlling food intake in ruminants. J. Dairy Sci. 50:77-80.

4.
Conrad, H. R., A. D. Pratt and J. W. Hibbs. 1964. Regulation of feed intake in dairy cows. Ι. Changes in importance of physical and physiological factors with increasing digestibility. J. Dairy Sic. 47:54-62.

5.
Forbes, J. M. 1995. Voluntary Food Intake and Diet Selection in Farm Animals. CAB International, Wallingford, U.K.

6.
Goering, H. K. and P. J. Van Soest. 1970. Forage Fiber Analyses. Agriculture Handbook No.379. Agricultural Research Service, USDA, Washington DC. U.S.A.

7.
Mertens, D. R. 1987. Predicting intake and digestibility using mathemetical models of ruminant function. J. Anim. Sci. 64:1548-1558.

8.
Okamoto, M., R. Oura. and J. Sekine. 1989. Relationship between particle size reduction of reticulo-ruminal contents and chewing time. Asian-Aust. J. Anim. Sci. 2:331-332.

9.
Sekine, J., Y. Imaki, Y. Kuninishi, R. Oura, H. Miyazaki, M. Okamoto and Y. Asahida. 1992. Effect of time after feeding on distribution of feed particles in the gastrointestinal tract of sheep given orchardgrass hay once a day. Asian- Aust. J. Anim. Sci. 5:55-61.

10.
Seoane, J. R., M. Cote and S. A. Visser. 1982. The relationship between voluntary intake and the physical properties of forages. Can. J. Anim. Sci. 62:473-480.

11.
Steel, R. G. D. and J. H. Torrie. 1960. Priciples and Procedures of Statistics. McGraw-Hill Book Co., NY.

12.
Van Soest, P. J. 1965. Symposium on factors influencing the voluntary intake of herbage by ruminants: Voluntary intake in relation to chemical composition and digestibility. J. Anim. Sci. 24:834-843.

13.
Waldo, D. R. 1986. Effect of forage quality on intake and forageconcentrate interactions. J. Dairy Sci. 69:617-631.

14.
Wattiaux, M. A., L. D. Stter and D. R. Mertens. 1993. Factors affecting volume and specific gravity measurements of neutral detergent fiber and forage particles. J. Dairy Sci. 76:1978-1988.