Made available in DSpace on 2022-04-28T19:00:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-01; An experiment was conducted in the Department of Experimental Stations of the Universidade Tecnológica Federal do Parana - UTFPR campus Dois Vizinhos - PR, with the objective of determining the nutritional levels of threonine for laying hens aged 75 to 90 weeks. One hundred fifty laying Shaver Brown pul...