Determinação da energia metabolizável do milho hidropônico para frangos de crescimento lento

Abstract

The objective of this work was to evaluate the apparent metabolizable energy corrected by the nitrogen balance (AMEn) of the diets. 75 male broiler chicks from the Label Rouge® lineage, acquired at one day of age, were used. At 21 days of age, they were weighed and distributed in experimental units, equipped with a feeder, trough-type drinker and collection trays to collect excreta. Three rations were evaluated: (test ration 1 - T1) reference ration (RR) and replacement of 10% of the reference ration with the test food (hydroponic corn) on 15 and 20 days of harvest, (test ration 2 - T2) harvested on 15 days and (test ration 3 - T3) harvested in 20 days, totaling three treatments, with five replications and five birds per experimental unit, distributed in a completely randomized design. The experiment lasted 7 days, with four days of adaptation and three days of collection. The apparent metabolizable energy and that corrected by the nitrogen balance (AMEn) of the diets were evaluated. It was observed that slow-growing chickens take advantage of 1428.52 kcal of EMAn/kg of corn at 15 days, 1342.67 kcal of EMAn/kg of corn at 20 days and 1385 kcal of EMAn/kg of hydroponic corn harvested at 15 and 20 days after sowing, 33% of gross energy.