Efikasnost korišćenja zrna pamuka u ishrani krava

The results of the investigation of cottonseed utilization efficiency in lactating cows nutrition are presented in this paper. Experiment was conducted on 20 cows (divided in two groups) in Holstein breed type. Rations contained similar amount of energy and protein. Dry matter content of control group ration composed of alfalfa, wheat straw, concentrate, brewers' grains and soybean meal was 32,37:3,87:14,84:9,89:34,03 i 4,13% respectively. The experimental group was fed with ration where 2,2 kg of concentrate dry matter was replaced with 1,84 kg of cottonseed and 0,36 kg of soybean meal dry matter. Protein percent in dry matter was 16,53 and 16,92%, and energy 6,54 and 6,66 MJ NEL/kg. Cottonseed addition had positive effects on milk (29,47:31,05 kg) and 4% FCM production (26,55:29,51 kg) milk fat content increased from 3,34 to 3,67%, and protein from 2,80 to 2,95 % (p>0.05). Dry matter intake per kg of produced milk in experimental group was lower by 6,66%, and 11,90 % for fat corrected milk, which reduced rate of nutrition costs in milk price by 4,48 percentage points.U radu su prikazani rezultati istraživanja efikasnosti korišćenja zrna pamuka u ishrani krava u laktaciji. Istraživanje je izvedeno na dvadeset krava (podeljenih u dve grupe po 10) crno bele rase u tipu holštajna. Obroci su sadržavali približno istovetnu količinu energije i proteina. Kontrolna grupa hranjena je obrokom u kojem je udeo SM iz zelene lucerke, pšenične slame koncentrata, sirovog pivskog tropa i sojine sačme iznosio 32,37:3,87:14,84:9,89:34,03 i 4,13%. U obroku II grupe krava 2,2 kg SM iz koncentrata bilo je zamenjeno sa 1,84 kg SM iz zrna pamuka, i 0,36 kg SM iz sačma soje. Udeo proteina u SM ispitivanih obroka iznosio je 16,53 i 16,92% a energije 6,54 i 6,66 NEL/kg. Uključivanje zrna pamuka u obrok krava pozitivno je uticalo na produkciju namuženog (29,47:31,05 kg) i na mast (4% mm) korigovanog mleka (26,55:29,51 kg), i povećanje masti, sa 3,34 na 3,67%, odnosno, proteina, sa 2,80 na 2,95 % (p>0.05). Utrošak suve materije obroka za kg mleka u krava koje su dobijale pamuk bio je manji za 6,66,% za namuženo odnosno 11,90 % za mast korigovano mleko, što se odrazilo na smanjeno učešće troškova ishrane u ceni mleka, za 4,48 procenat poena