Original scientific paper
ESTIMATION OF THE HAY NET ENERGY VALUE WITH DIGESTIBILITY COEFICIENTS OR REGRESSION EQUATION
Jasna Stekar
; Univerza v Ljubljani, Biotehniška fakulteta, Oddelek za zootehniko, Domžale, Slovenija
Franc Zagožen
; Univerza v Ljubljani, Biotehniška fakulteta, Oddelek za zootehniko, Domžale, Slovenija
Irena Ovčar - Sešelj
; Univerza v Ljubljani, Biotehniška fakulteta, Oddelek za zootehniko, Domžale, Slovenija
Andrej Golob
; Univerza v Ljubljani, Biotehniška fakulteta, Oddelek za zootehniko, Domžale, Slovenija
Abstract
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, Zagožen,1987). The samples were taken at random. The digestibility coefficients from tables were selected by six persons, four of them selected twice. With a two-way analysis of variance we established that the were statistically significant differences among persons and with 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. The correlation coefficients were calculated for all pairs. 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 a regression equation than by O. Kellner's.
Keywords
Hrčak ID:
164920
URI
Publication date:
23.10.1994.
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