Ammoniated maize residue for the fattening of lambs

Abstract

The use of ammoniated maize residue as a replacement for maize meal in the diet for fattening lambs, was investigated. Ammoniation of maize residue increased average daily DMI and ADG at the 0 and 20oh concentrate levels. The feed conversions to carcass in lambs fed untreated maize residue with 40,60 or 80% concentrate were 14,0; 10,1 and 8,1, respectively, and for the ammoniated residue with 0, 20,40,60 or 80% concentratew ere 14,6;1 1,6;9 ,9;9 ,4; and 8.5,r espectively. Concentrate levels significantly affected digestibility in both untreated and ammoniated diets. Ruminal ammonia-N levels were between 180-250 mgl l and were signi f icant lyh ighero n ammoniated maize residue at the 40 and 80% concentrate levels. Ammoniation of maize residue increased lamb performance at low concentrate levels.

Die gebruikv an geammonifiseerdem ielierestea s 'n plaasvervanger vir mieliemeel in die rantsoen vir die vetmaak van lammers is ondersoek. Ammonifisering van mieliereste het die gemiddelde daaglikse DMI en ADG laat toeneem by die 0 en 20% konsentraatvlakkeD. ie omset van voer na karkas in lammers wat onbehandelde mieliereste met 40, 60 en 80% konsentraat ontvang het, was 14,0; 10,1 en 8,1 en vir die geam" monifiseerde reste met 0, 20, 40,60 of 80% konsentraat was dit 14,6;1 1,6;9 ,9;9 ,4 en 8,5 onderskeidelikK. onsentraatvlakke het verteerbaarheidb etekenisvolb einvloedi n die onbehandelde sowel as die geammonifiseerdera ntsoene.A mmonium-N vlakke in die grootpens was tussen 180-250 mg/l en was betekenisvolh o€r op geammonifiseerdem ielieresteb y die 40 en 80% konsentraatvlakkeA. mmonifiseringv an mielieresteh et die produksiev an lammerso p lae konsentraatvlakkvee rhoog.

Keywords: Ammoniation, maize residue, lamb growth and fattening, feed conversion,in vivo digestibility, nitrogen digestibility, rumen parameters.