This experiment was carried with Japanese quails in the egg production phase with the objective of determining the requirements of digestible methionine + cystine (M+C) for higher production and egg quality. A total of 240 Japanese quails were distributed in a randomized complete block design. The basal diet was supplemented with different DL-methionine levels, corresponding to digestible methionine + cystine levels of 0.55, 0.61, 0.67, 0.73 and 0.79%. The characteristics analyzed were feed intake (g/quail/day), egg production (%), egg weight […]

An experiment study was carried out to establish the nutritional requirement of methionine + cystine (met + cyst) for brown-egg laying hens, in the second production cycle. One hundred and eighty Lohmann Brown birds from 79 and 95 weeks of age were used fed a base diet deficient in met + cyst, supplemented with 0.00; 0.053; 0.108; 0.161 and 0.214% DL-Methionine (98%), providing 0.490; 0.542; 0.594; 0.648 and 0.698% digestible met + cyst. The levels supplementation of met + cyst […]

With the objective of determining the nutritional requirement of digestible lysine for brown-egg laying hens from 79 to 95 weeks of age, an experiment was carried out using 180 commercial Lohmann Brown laying hens, distribuited in five treatments (0.555; 0.605; 0.655; 0.705 and 0.755%), six replications and six birds birds/replication. The feed intake and the food conversion per dozen of eggs were not influenced by the lysine levels. There was a positive linear effect on lysine intake and quadratic on […]

This study was carried out to evaluate the energy levels in the diet to obtain better performance rates and quality of eggs from laying hens in the second production cycle. One hundred and eighty Bovans Goldline laying hens with 62 weeks of age were used during four 28-day periods. A completely randomized experimental design was used with four metabolizable energy levels (2,650, 2,725, 2,800, 2,875 and 2,950 kcal/kg), each with six replicates of six birds. The energy level of diet […]

An experiment was conducted to evaluate the influence of two vitamin D sources and three vitamin C levels on performance, internal and external egg quality, and bone strength characteristics. In addition, the total and ionic blood calcium concentrations, bone ash and calcium were determined. Two hundred and eighty eight 23-week-old ISA Babcock B-300® laying hens were used during the 12-week study in a 2 × 3 factorial arrangement: vitamin D sources (cholecalciferol and 25-hydroxycholecalciferol – 25(OH)D3) and vitamin C levels […]

An experiment was performed to determine the dietary digestible lysine requirement of hens (Lohman LSL and Lohman Brown) from 54 to 70 weeks of age. Three hundred and sixty hens were randomly assigned to 5 × 2 factorial arrangement (Lys levels by hen strain), according to the dietary treatments withj six replicates (groups) of 6 birds. An experimental diet was formulated to contain deficient digestible lysine levels in order to be supplemented with lysine (L-Lys-HCL,78%) originating the five dietary treatments […]

The nutritional requirement of digestible lysine was determined in 180 Lohmann LSL white-egg laying hens raised from 79 to 95 weeks of age. The birds were allotted to five levels (0.555; 0.605; 0.655; 0.705 and 0.755%) of digestible lysine, six replicates and six birds per experimental unit. Quadratic effect of digestible lysine levels on feed intake, average weight gain, feed conversion/egg mass, the egg weight and the egg mass was observed. For the characteristics digestible lysine intake, feed conversion/dozen eggs […]

An experiment was conducted with the objective to verify the effect of different levels of available phosphorus (aP) and of calcium (Ca) in the diet on the performance, the quality of eggs and the nutritional status of the bone tissue of japanese quails during the initial laying phase. A total of 700 japanese quails, with 61 days of age, distributed in 70 experimental units with 10 birds each were used. A completely randomized experimental design was use, in a 5 […]

An experiment was carried out to verify the effect of different dietary Na levels on the performance and egg quality of laying Japanese quail during the peak of production (69 to 132 days old). A total of 300 laying Japanese quails aged 69 days was allocated to 30 experimental units with ten birds each. The quails were assigned to a completely randomized design, with five treatments, six replicates. The Na levels studied were 0.017, 0.083, 0.149, 0.215, and 0.281% corresponding […]

An experiment was conducted to determine nutritional calcium requirement of 360 Japanese female quails averaging initial weight of 121.5 g during the initial production phase (from 56 to 171 days of age). A complete randomized design with a 6 x 4 factorial arrangement (six Ca levels: 1.6, 2.0, 2.4, 2.8, 3.2, and 3.6% and four experimental periods of 28 days each) was used. Each treatment consisted of six replicates and a cage with ten birds, that was the experimental unit. […]