Estimation of the hay net energy value with digestibility coefficients or regression equation
1993
Stekar, J.M.A. | Zagozen, F. | Ovcar-Seselj, I. | Golob, A. (Biotechnical Faculty, Ljubljana (Slovenia). Zootechnical Dept.)
The energy value of hay (n=693), aftermath (n=171) and fresh herbage from grassland (n= 158) were estimated by starch equivalent (SE) calculated from O. Kellner's and compared to SE calculated by the regression equation (Cmok, Stekar, Zagozen, 1987). The samples were random. The digestible coefficients from tables were selected by six persons, four of them selected twice. With two-way analysis of variance we established that there were stastistically significant differences among persons and within the same person. Regarding the small portion of explained variance it seems that the true reason for these differences is in the heterogeneousness of samples. Between both ways of SE calculation there is a statistically significant difference. For all pairs the correlation coefficients were calculated.The correlation coefficients between them are high (0,83 to 0,95). The value of hay and aftermath is estimated accurately enough and more objectively by regression equation than by O. Kellner's
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