Poljoprivreda, Vol. 16 No. 2, 2010.
Izvorni znanstveni članak
FEEDING VALUE OF GRASS SILAGES BASED ON DRY MATTER CONCENTRATION
Marina Vranić
orcid.org/0000-0001-6280-0116
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb
Mladen Knežević
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb
Krešimir Bošnjak
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb
Goran Perčulija
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb
Josip Leto
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb
Hrvoje Kutnjak
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb
Maja Lujanac
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb
Sažetak
Total of 477 grass silage samples of different origin and quality were analysed by NIR spectroscopy to determine crude protein (CP), neutral detergent fibre (NDF), digestible organic matter (OM) in the dry matter (DM) (D-value), metabolizable energy (ME), pH value and the ammonium nitrogen (NH3-N). According to DM content (g kg-1 fresh sample), the samples were divided into 8 classes: (1)> 228; (2) 229-313; (3) 314-398; (4) 399-483; (5) 484-568; (6) 569-653; (7i) 654-738; (8) <739. DM increase was followed by a significant (P<0.005) decrease in CP, D-value and ME and an increase (P>0.005) in NDF and pH value. It was concluded that increased DM concentration in silage samples was not a result of –grass wilting before ensiling but of advanced grass maturity at harvest.
Ključne riječi
grass silage; grass maturity; dry matter; chemical composition
Hrčak ID:
62011
URI
Datum izdavanja:
9.12.2010.
Posjeta: 1.584 *