| Abstract (croatian) | Cilj istraživanja bio je utvrditi utjecaj dodatka mljevenog zrna kukuruza biljnoj masi poluprirodnog travnjaka na pH vrijednost i kemijski sastav fermentirane krme. Biljnoj masi poluprirodnog trvnjaka je kod siliranja dodano mljeveno zrno kukuruza u udjelu od 0, 3, 6, 12 i 24 % na 200 g biljne mase poluprirodnog travnjaka za tretmane TR0, TR3, TR6, TR12 i TR24, tim redom. Formirano je po 5 laboratorijskih silosa (5 ponavljanja) po tretmanu. Laboratorijski silosi ostavljeni su fermentirati 47 dana nakon čega je klasičnim metodama utvrđen sadržaj suhe tvari (ST) i pH vrijednost, a NIR spektroskopijom kemijski parametri fermentirane krme: sirovi proteini (SP), sirova vlakna (SV), pepeo, nedušićne ekstraktivne tvari (NET) i sirove masti (SM). Utvrđeno je da dodatak 3 % mljevenog zrna kukuruza biljnoj masi poluprirodnog travnjaka kod siliranja ne utječe na sadržaj ST, SP i SV, dok dodatak 3 i 6 % ne utječu na sadržaj pepela, NET i pH vrijednost fermentirane krme (P>0,05). Dodatak 3-24 % mljevenog zrna kukuruza biljnoj masi poluprirodnog travnjaka kod siliranja linearno povećava sadržaj ST (P<0,001), SV (P<0,001), NET (P<0,001), a smanjuje sadržaj SP (P<0,05) i pepela (P<0,001) u fermentiranoj krmi. Zaključeno je da, od istraživanih tretmana, najveći učinak na snižavanje pH vrijednosti ima dodatak 12% mljevenog zrna kukuruza biljnoj masi poluprirodnog travnjaka. Osim toga, dodatak mljevenog zrna kukuruza utječe na kemijski sastav, kao preduvjet hranidbene vrijednosti fermentirane krme, na način da smanjuje sadržaj SP i pepela, a povećava sadržaj ST, SV i NET-a u fermentiranoj krmi. |
| Abstract (english) | The objective of this paper was to determine the effect of ground corn grain supplementation to the semi-natural grassland on the pH value and chemical composition of fermented forage. The ground corn was supplemeted to fresh semi-natural grassland forage at ratio of 0, 3, 6, 12 and 24% for treatments TR1, TR2, TR3, TR4 and TR5 respectivelly. A total of 25 laboratory siloses (5 treatments x 5 repetitions) per treatment were formed. Forage was fermented for 47 days before analysis by wet chemistry for dry matter (DM) content and pH value while NIR spectroscopy was used for the chemical quality parameters prediction: crude proteins (CP), crude fiber (CF), ash, non-nitrogen extractive substances (NET) and crude fat (CF). It was found that the addition of 3% of ground maize grain to the semi-natural grassland forage at ensiling does not affect DM, CP and CF, while the addition of 3 and 6 % does not affect the ash content, NET and pH value of fermented forage (P>0.05). The addition of 3 -24 % of ground corn to the semi-natural grassland forage at ensiling linearly increased the DM (P<001), CF (P<0,001), NET (P<0,001) and at the same time reduced CP (P<0.05) and ash (P<0,001) in fermented forage. It was concluded that, of the treatments investigated, the greatest effect on lowering the pH value in silo had 12 % supplementation of ground corn to the semi-natural forage. Besides, the ground corn supplementation affected the chemical composition, as a prerequisite of forage nutritive value, in a way that it reduced the content of CP and ash, and increased DM, CF and NET in fermented forage. |
