Comparison of in vitro gas production technique with in situ nylon bag technique to estimate dry matter degradation
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Dosyalar
Tarih
2005-02
Kurum Yazarları
Kamalak, Adem
Süreli Yayın başlığı
Süreli Yayın ISSN
Cilt Başlığı
Yayınevi
Czech Academy Agricultural Sciences
Özet
Dry matter (DM) degradation of wheat straw (WS), barley straw (BS), lucerne hay (LH) and maize silage (MS) was determined using two different techniques: (i) in vitro gas production and (ii) nylon bag degradability technique. In vitro gas production and in situ DM disappearance were measured after 3, 6, 12, 24, 48, 72 and 96 hours of incubation. In situ and in vitro DM degradation kinetics was described using the equation y = a + b (1 - e(ct)). In all incubations there were significant (P < 0.001) correlations between gas production and in situ DM disappearance or estimated parameters ((a + b)(gas) and (a + b)(is) or (a + b)(gas) and EDMDis) whereas there were no significant (P > 0.05) correlations between c(gas) and c(is) or b(gas) and b(is). Gas production from the insoluble fraction (b) alone explained 98.3 % of the variation of EDMD. The inclusion of gas production from the quickly soluble fraction (a) and rate constant (c) of gas production in the regression equation improved the accuracy of EDMD prediction. The correlations between the results of both methodologies seem to be, sufficiently strong to predict degradability parameters from gas production parameters. It was concluded that the in vitro gas production technique has good potentiality to predict in situ DM disappearance and some DM degradation parameters.
Açıklama
Anahtar kelimeler
In vitro gas production, In situ dry matter degradability, Forage, Rumen fermentation, Prediction, Degradability, Digestibility, Invitro, Feedstuffs, Silage, Extent, Grass, Agriculture, Hordeum, Medicago sativa, Triticum aestivum, Zea mays
Alıntı
Kamalak, A. vd. (2005). "Comparison of in vitro gas production technique with in situ nylon bag technique to estimate dry matter degradation". Czech Journal of Animal Science, 50(2), 60-67.