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Estimation of intake and apparent digestibility of kleingrass from in situ parameters measured in sheep

  • C. M. Ferri (a1), V. V. Jouve (a1), N. P. Stritzler (a1) (a2) and H. J. Petruzzi (a1) (a2)

Abstract

The voluntary intake and apparent digestibility of kleingrass (Panicum coloratum cv. Verde) were measured in seven periods, comprising one full year. The forage was offered twice a day ad libitum to seven rams, fitted with faeces collection bags; each experimental period was composed of 8 days for adaptation and 8 days for collection of data. The dry-matter (DM) intake (DMI) varied from 36·1 to 64·9 glkg M075, the digestible dry-matter intake (DDMI), from 17·4 to 41·9 glkg M0·75 and the in vivo dry matter apparent digestibility (DMD), from 0·471 to 0·667.

Daily samples of offered forage were taken and pooled subsamples from each of the seven periods were incubated in nylon bags in the rumen of three Hereford steers. The data were fitted to the exponential equation: p = a + b (1-e-ct) to estimate p (the proportionate loss of DM at time t of incubation); effective degradability (ED) and lag time (L) were also estimated.

The parameters obtained in situ were related to the in vivo results by simple and multiple regression. The correlation coefficients of the rate of degradation (c) and ED with DMI, DDMI and DMD were, respectively, 096 and 0·97; 0·97 and 0·96; 0·86 and 0·88. By including a, b, c and L into a multiple regression analysis, the coefficients of determination (R2) were: DMI: 0·99; DDMI: 0·99 and DMD: 0·91. Within the conditions of this study, the parameters obtained in situ were reasonable estimators of voluntary intake and apparent digestibility.

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Allen, M. S. 1996. Physical constraints on voluntary intake of forages by ruminants. Journal of Animal Science. 74: 30633075.
Allen, M. S. and Mertens, D. R. 1988. Evaluating constraints on fiber digestion by rumen microbes. Journal of Nutrition. 118: 261270.
Bansal, S. K., John, C. B. and Rai, G. S. 1986. Panicum coloratum h., a promising fodder for stallfed goats. Indian Journal of Animal Science. 56: 11111112.
Cairo, M. D., Lopez, S., Gonzalez, J. S. and Ovejero, F. J. 1991. The use of the rumen degradation characteristics of hay as predictors of its voluntary intake by sheep. Animal Production. 52: 133139.
Chermiti, A., Nefzaoui, A., Teller, E., Vanbelle, M., Ferchichi, H. and Rokbani, N. 1996. Prediction of the voluntary intake of low quality roughages by sheep from chemical composition and ruminal degradation characteristics. Animal Science. 62: 5762.
Forbes, J. M. 1986. The voluntary food intake of farm animals. Butterworths, London.
Hovell, F. D. DeB., Ngambi, J. W. W., Barber, W. P. and Kyle, D. J. 1986. The voluntary intake of hay by sheep in relation to its degradability in the rumen as measured in nylon bags. Animal Production. 42: 111118.
Kibon, A. and Ørskov, E. R. 1993. The use of degradation characteristics of browse plants to predict intake and digestibility by goats. Animal Production. 57: 247251.
Lindberg, J. E. 1985. Estimation of rumen degradability of feed proteins with the in sacco technique and various in vitro methods: a review. Ada Agricultural Scandinavica, Supplementum. 25: 6497.
Lippke, H. 1980. Forage characteristics related to intake, digestibility and gain by ruminants. Journal of Animal Science. 50: 952961.
McDonald, I. 1981. A revised model for the estimation of protein degradability in the rumen. Journal of Agricultural Science, Cambridge. 96: 251252.
Mertens, D. R. 1994. Regulation of forage intake. In Forage quality, evaluation and utilization (ed. Fahey, G. C.), pp. 493. ASA, CSSA, and SSSA, Wisconsin, USA.
Michalet-Doreau, B. and Ould-Bah, M. Y. 1992. In vivo and in sacco methods for the estimation of dietary nitrogen degradability in the rumen. A review. Animal Feed Science and Technology. 40: 5786.
Minson, D. J. and Haydock, K. P. 1971. The value of pepsin dry matter solubility for estimating the voluntary intake and digestibility of six Panicum varieties. Australian Journal of Experimental Agriculture and Animal Husbandry. 11: 181185.
Minson, D. J. and Wilson, J. R. 1994. Prediction of intake as an element of forage quality. In Forage quality, evaluation utilization (ed. Fahey, G. C.), pp. 533563. ASA, CSSA, and SSSA, Wisconsin, USA.
Nandra, K. S., Hendry, A. and Dobos, R. C. 1993. A study of voluntary intake and digestibility of roughages in relation to their degradation characteristics and retention time in the rumen. Animal Feed Science and Technology 227–237.
Nandra, K. S., Oddy, V. H., Ayres, J. F., Nicholls, P. J., Langevad, B. and Ly, W. 1995. The use of cell wall organic matter components and in vitro degradability characteristics to predict intake and digestibility of white clover for sheep. Australian Journal of Agricultural 46: 11111120.
Nordisk Kontaktorgan for Jordbrugsforskning. 1985. Introduction to the Nordic protein evaluation system for ruminants into practice and further research requirements. Acta Agriculturx Scandinavica Supplementum 25: 216220.
Ørskov, E. R. 1991. Manipulation of fibre digestion in the rumen. Proceedings of the Nutrition Society. 50: 187196.
Ørskov, E. R. and McDonald, I. 1979. The estimation of protein degradability in the rumen from incubation measurement weighted according to rate of passage. Journal of Agricultural Science, Cambridge. 92: 499503.
Ørskov, E. R., Reid, G. W. and Kay, M. 1988. Prediction of intake by cattle from degradation characteristics of roughages. Animal Production. 46: 2934.
Ørskov, E. R. and Ryle, M. 1990. Energy nutrition in ruminants. Elsevier Applied Science, London.
Schneider, B. H. and Flatt, W. P. 1975. The evaluation of feeds through digestibility experiments. The University of Georgia Press, USA.
Sokal, R. R. and Rohlf, F. J. 1995. Biometry. The principles and practice of statistics in biological research, third edition. Freeman and Co., New York.
Stritzler, N. P., Pagella, J. H., Jouve, V. V. and Ferri, C. M. 1996. Semi-arid warm-season grass yield and nutritive value in Argentina. Journal of Range Management. 49: 121125
Van Soest, P. J. 1982. Nutritional ecology of the ruminant. O. and B. Books, Corvallis, Oregon.
Vera, R. R., Irazoqui, H. and Menvielle, E. E. 1973. The nutritive value of weeping lovegrass during the growing season. 1. Digestibility and yield of digestible nutrients. Journal of the British Grassland Society 28: 149152.
Young, B. A. 1993. Optimising seed production in Kleingrass, Panicum coloratum L. Journal of Applied Seed Production. 11: 1319.

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