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Made available in DSpace on 2018-11-26T16:16:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-07-01. Added 1 bitstream(s) on 2019-10-09T18:25:35Z : No. of bitstreams: 1 S1516-35982015000700231.pdf: 1934779 bytes, checksum: 775debd978577bb1995d7780bad26340 (MD5) Our objective was to investigate the effect of the replacement of aruana grass by gliricidia on the fermentative losses, chemical composition, and aerobic stability of silages. For ensiling, whole-crop aruana grass (75 d of growth) was chopped (275 g kg(-1) dry matter - DM) and ensiled alone or associated with gliricidia (270 g kg(-1) DM; 150 d of growth). For gliricidia, we used only the leaves and stalks to ensile. The evaluated treatments were different ratios of aruana grass to gliricidia (100:0, 75:25, 50:50, 25:75, and 0:100), with four replicates (mini-silos). The silage composed only of gliricidia exhibited a lower pH than the other silages. Dry matter recovery was not affected by the treatments, although effluent losses were affected. The replacement of aruana grass by gliricidia 50% at ensiling resulted in a higher lactic acid bacteria count. The aruana grass silages displayed lower protein contents and a higher neutral detergent fiber content than the gliricidia silages after 40 d of fermentation. Consequently, the silage consisting of 100% gliricidia showed higher in vitro DM digestibility, presenting an increase of 8.13% after 40 d of fermentation compared with 100% of aruana grass silage. After silo opening, the gliricidia silage was very stable (>72 h). The low quality of aruana grass silage is improved by replacing this grass with significant amounts of gliricidia (approximately 75%). Univ Jose Rosario Vellano, Programa Posgrad Ciencia Anim, Alfenas, MG, Brazil Univ Jose Rosario Vellano, Dept Agron, Alfenas, MG, Brazil Univ Estadual Paulista, Programa Posgrad Zootecnia, Jaboticabal, SP, Brazil Univ Estadual Paulista, Dept Zootecnia, Jaboticabal, SP, Brazil Univ Estadual Paulista, Programa Posgrad Zootecnia, Jaboticabal, SP, Brazil Univ Estadual Paulista, Dept Zootecnia, Jaboticabal, SP, Brazil

Made available in DSpace on 2022-04-29T09:35:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-01 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. © 2014 Sociedade Brasileira de Zootecnia. Universidade Estadual Paulista 'Júlio de Mesquita Filho', Botucatu, SP Departamento de Zootecnia Universidade Estadual Paulista 'Júlio de Mesquita Filho', Botucatu, SP Departamento de Zootecnia Universidade José do Rosário Vellano, Alfenas, MG Curso de Zootecnia Universidade Estadual Paulista Júlio de Mesquita Filho, Botucatu, SP Universidade Estadual Paulista 'Júlio de Mesquita Filho', Botucatu, SP Departamento de Zootecnia Universidade Estadual Paulista 'Júlio de Mesquita Filho', Botucatu, SP Curso de Zootecnia Universidade Estadual Paulista Júlio de Mesquita Filho, Botucatu, SP