Feed type for induced molting of commercial layer hens
An experiment employing three hundred and twenty 81-week-old Lohmann LSL commercial-breed hens was conducted to compare alternative induced-molting methods with the conventional method (fasting). Induced molting lasted 28 days at most, production and quality being monitored for four periods of 28 da...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Zootecnia
2014-03-01
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| Series: | Revista Brasileira de Zootecnia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000300007&tlng=en |
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| author | Graciene Conceição dos Santos Edivaldo Antônio Garcia Javer Alves Vieira Filho Andréa de Britto Molino Kleber Pelícia Daniella Aparecida Berto Elise Saori Floriano Murakami Andressa Takahara Montenegro |
| author_facet | Graciene Conceição dos Santos Edivaldo Antônio Garcia Javer Alves Vieira Filho Andréa de Britto Molino Kleber Pelícia Daniella Aparecida Berto Elise Saori Floriano Murakami Andressa Takahara Montenegro |
| author_sort | Graciene Conceição dos Santos |
| collection | DOAJ |
| description | An experiment employing three hundred and twenty 81-week-old Lohmann LSL commercial-breed hens was conducted to compare alternative induced-molting methods with the conventional method (fasting). Induced molting lasted 28 days at most, production and quality being monitored for four periods of 28 days thereafter. A completely randomized experimental design with five treatments, eight replicates of eight birds each per plot was adopted. The following experimental treatments were applied until a loss of 26% of body weight was reached: T1 - fasting, T2 - wheat bran ad libitum, T3 - rice bran ad libitum, T4 - cracked rice ad libitum, T5 - ground alfalfa ad libitum. Birds were then fed production diet ad libitum, except for those on treatment T1 (fasting) which received 30, 60 and 100 g/bird/day and then feed ad libitum. During induced molting the birds were exposed to a natural photoperiod and at day 28 that period was increased by 30 minutes/week until reaching 16 hours of light/day. The characteristics evaluated during induced molting were: feed intake, body weight changes and laying percentage. In the post-molt period, performance (feed intake, laying percentage, egg weight, egg mass, feed conversion ratio per dozen and per egg mass and percentage of broken eggs) and egg quality (specific gravity, eggshell breaking strength, percentages of eggshell, yolk, and albumen, eggshell thickness, yolk color and Haugh unit) were evaluated. Every 28 days one egg was collected from each repetition for three consecutive days for quality assessment. The use of rice bran and wheat bran is viable as molting inducers since the birds given those treatments display performance and egg quality similar to those fasted during the induced molting and also because these ingredients promote easier handling, eliminates the need for grinding and feed-mixing equipment and, being less aggressive, provide greater bird welfare. |
| first_indexed | 2024-12-21T00:10:13Z |
| format | Article |
| id | doaj.art-d851380c93164133aa67948523de6a99 |
| institution | Directory Open Access Journal |
| issn | 1806-9290 |
| language | English |
| last_indexed | 2024-12-21T00:10:13Z |
| publishDate | 2014-03-01 |
| publisher | Sociedade Brasileira de Zootecnia |
| record_format | Article |
| series | Revista Brasileira de Zootecnia |
| spelling | doaj.art-d851380c93164133aa67948523de6a992022-12-21T19:22:22ZengSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia1806-92902014-03-01433146150Feed type for induced molting of commercial layer hensGraciene Conceição dos Santos0Edivaldo Antônio Garcia1Javer Alves Vieira Filho2Andréa de Britto Molino3Kleber Pelícia4Daniella Aparecida Berto5Elise Saori Floriano Murakami6Andressa Takahara Montenegro7Universidade Estadual Paulista Júlio de Mesquita FilhoUniversidade Estadual Paulista Júlio de Mesquita FilhoUniversidade Estadual Paulista Júlio de Mesquita FilhoUniversidade Estadual Paulista Júlio de Mesquita FilhoUniversidade José do Rosário VellanoUniversidade Estadual Paulista Júlio de Mesquita FilhoUniversidade Estadual Paulista Júlio de Mesquita FilhoUniversidade Estadual Paulista Júlio de Mesquita FilhoAn experiment employing three hundred and twenty 81-week-old Lohmann LSL commercial-breed hens was conducted to compare alternative induced-molting methods with the conventional method (fasting). Induced molting lasted 28 days at most, production and quality being monitored for four periods of 28 days thereafter. A completely randomized experimental design with five treatments, eight replicates of eight birds each per plot was adopted. The following experimental treatments were applied until a loss of 26% of body weight was reached: T1 - fasting, T2 - wheat bran ad libitum, T3 - rice bran ad libitum, T4 - cracked rice ad libitum, T5 - ground alfalfa ad libitum. Birds were then fed production diet ad libitum, except for those on treatment T1 (fasting) which received 30, 60 and 100 g/bird/day and then feed ad libitum. During induced molting the birds were exposed to a natural photoperiod and at day 28 that period was increased by 30 minutes/week until reaching 16 hours of light/day. The characteristics evaluated during induced molting were: feed intake, body weight changes and laying percentage. In the post-molt period, performance (feed intake, laying percentage, egg weight, egg mass, feed conversion ratio per dozen and per egg mass and percentage of broken eggs) and egg quality (specific gravity, eggshell breaking strength, percentages of eggshell, yolk, and albumen, eggshell thickness, yolk color and Haugh unit) were evaluated. Every 28 days one egg was collected from each repetition for three consecutive days for quality assessment. The use of rice bran and wheat bran is viable as molting inducers since the birds given those treatments display performance and egg quality similar to those fasted during the induced molting and also because these ingredients promote easier handling, eliminates the need for grinding and feed-mixing equipment and, being less aggressive, provide greater bird welfare.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000300007&tlng=encracked riceegg productionground alfalfarice branwheat bran |
| spellingShingle | Graciene Conceição dos Santos Edivaldo Antônio Garcia Javer Alves Vieira Filho Andréa de Britto Molino Kleber Pelícia Daniella Aparecida Berto Elise Saori Floriano Murakami Andressa Takahara Montenegro Feed type for induced molting of commercial layer hens Revista Brasileira de Zootecnia cracked rice egg production ground alfalfa rice bran wheat bran |
| title | Feed type for induced molting of commercial layer hens |
| title_full | Feed type for induced molting of commercial layer hens |
| title_fullStr | Feed type for induced molting of commercial layer hens |
| title_full_unstemmed | Feed type for induced molting of commercial layer hens |
| title_short | Feed type for induced molting of commercial layer hens |
| title_sort | feed type for induced molting of commercial layer hens |
| topic | cracked rice egg production ground alfalfa rice bran wheat bran |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000300007&tlng=en |
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