An experiment was carried out to verify the effect of different levels of sodium and phosphorus (P) on the performance, eggshell quality and on some blood constituents of 144 laying hens Hy-Line W36, aged 60 weeks, allotted to 36 experimental units with four hens each. A randomized experimental block design was used in a factorial arrangement (3 x 3), sodium levels (.16, .20 and .24%) and phosphorus levels (.35, .45 and .55%), totalizing nine treatments, two blocks with two replicates […]

The objective of this study was to estimate the genetic correlation between semen (semen volume, sperm motility and spermatozoa concentration) and egg production traits (partial and total egg production, and egg weight) from a White Leghorn strain. In order to obtain semen traits, 698 DD1 strain roosters developed at CNPSA/EMBRAPA were used. The semen were collected at 24, 26 and 28 wk of age, and, to obtain the egg traits, full sisters (average of two sisters per male) were used. […]

ABSTRACT – An experiment was carried out to verify the influence of different levels of energy, vitamin D3 and sodium: chloride ratio on the performance, eggshell quality and on determined blood constituents of 192 laying hens Hy-Line W36, aged 72 weeks, allotted to a 48 experimental units with four hens each. A completely randomized experimental design was used in a factorial arrangement (3 x 2 x 2), metabolizable energy levels (2900, 3000 and 3100 kcal/kg), vitamin D3 levels (500 and […]

The objective of this experiment was to evaluate the different levels of manganese and phosphorus (P) on the performance and eggshell quality and on determined blood constituents of 96 laying hens Hy-Line W36, with 60 weeks of age, distributed in 24 lots with four hens each. A completely randomized experimental design was used in a factorial arrangement (3 x 2), manganese levels (70, 140 and 210 ppm) and total phosphorus levels (.35 and .55%), totalizing six treatments with four replicates […]