An experiment was conducted aiming to verify the effect of different levels of available phosphorus (AP) in the diet on performance, egg quality, bone tissue and percentages of P, Ca and Mg in excreta produced by quails during the final third of the production cycle. A total of 300 Japanese quails, with 313 days of age, was assigned to 30 experimental units of ten birds. A completely randomized design was used, with five levels of AP (0.15, 0.25, 0.35, 0.45 […]

This experiment was conducted to evaluate the effect of levels of calcium (Ca) and particle size of limestone (LS) for laying hens. It was used 216 Dekalb White laying hens at 25 to 49 weeks of age in a completely randomized design in a 3 × 2 factorial arrangement, composed of three levels of calcium (3.92, 4.02 and 4.12%) and two particle sizes of limestone (thin – 0.60 mm; and thick – 1.00 mm), resulting in 6 treatments with six […]

It was conducted an experiment with the objective of setting the nutritional requirement of methionine+cystine for white-egg laying hens in the second production cycle. It was used 180 white-egg laying hens from 79 to 95 weeks of age submitted to a basal diet deficient in methionine+cystine, supplemented with 0.00; 0.053; 0.108; 0.161 or 0.214% of DL-methionine (98%) to provide 0.490; 0.542; 0.594; 0.648 and 0.698% of digestible methionine+cystine in the rations. Levels of supplementation followed ratios of methionine+cystine:lysine of 75, […]

In order to determine nutritional requirement of digestible threonine for white-egg laying hens in the second production cycle (from 79 to 95 weeks of age), it was carried out an experiment with 180 commercial Lohmann LSL laying hens, distributed in five diets (0.380; 0.413; 0.446; 0.479 and 0.512% digestible threonine), six replicates and six birds per experiment unit. Levels of threonine in the ration quadratically affected feed intake, feed conversion per mass and per dozen of eggs, laying rate, weight […]

This work aimed at evaluating the performance of Japanese quails fed diets with processed whole soybean during the laying phase. It was used 320 Japanese female quails at 29 weeks of age with an average weight of 186.1 ± 4.0 g distributed in a complete randomized experimental design, with 8 replicates, each one with 10 quails per experimental unit. Diets were isocaloric and isonutritives for crude protein, digestible lysine, digestible methionine + cystine, calcium, available phosphorus and sodium. Thus, it […]

The objective of this work was to compare the levels of fatty acids between conventional commercial eggs and designer omega-3 eggs. It was used 864 Isa Brown line laying hens randomly distributed in two groups, so each cage with four birds was considered a replicate, totalizing 216 repetitions. In the group for production of conventional eggs, birds were fed corn- and soybean-based rations during the entire productive life while in the group for production of designer eggs, they were fed, […]

This experiment was conducted aiming to verify the effect of four levels of calcium (Ca) and available phosphorus (aP) in the diet on the performance, quality of eggs and the mineral excretion in Japanese quails during the final third of the production cycle. A total of 384 quails at 313 days of age was used. They were distributed in a complete random design in a 4 × 2 factorial scheme composed of four levels of calcium (2.0, 2.5, 3.0, and […]

This experiment was conducted to evaluate the effect of including defatted corn germ meal in diets for laying hens. It was assigned two hundred and forty laying hens to a randomized design, with six diets and five replicates of eight hens per diet. Experimental diets were formulated by inclusion of defatted corn germ meal at 0, 6, 12, 18, 24 and 30% level. The period experiment was carried out for four 28-day cycles and performance (feed intake, egg production, egg […]

The objective of this work is to determine the nutritional requirement of digestible threonine for brown-egg laying hens between 79 to 95 weeks of age. For this experiment, 180 commercial Lohmann Brown laying hens were used, distributed in five digestible threonine levels (0.380; 0.413; 0.446; 0.479 and 0.512%), each one with six replicates and six hens/replicate. It was observed a quadratic effect of threonine levels on the feed intake, egg mass conversions, egg dozen conversions, egg production, egg weight, and […]

In this experiment it was aimed to determine the best levels of digestible lysine for laying hens in production period. Performance, nutrients intake, metabolism, egg quality, blood parameters and development of reproductive tract for 160 Hy-Line W-36 hens at 25 weeks of age. Hens were distributed in a completely randomized design with four levels of digestible lysine (600, 700, 800 or 900 mg of Lys/kg) and four replicates by using a split spot scheme was used at evaluation of nitrogen […]