Estratégias de fornecimento de dietas à base de palma forrageira para vacas leiteiras

Detalhes bibliográficos
Ano de defesa: 2019
Autor(a) principal: SANTOS, Diego Amorim dos lattes
Orientador(a): FERREIRA, Marcelo de Andrade
Banca de defesa: GUIM, Adriana, CONCEIÇÃO, Maria Gabriela da, FREITAS, Erinaldo Viana de, AZEVEDO, Marcílio de
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal Rural de Pernambuco
Programa de Pós-Graduação: Programa de Pós-Graduação em Zootecnia
Departamento: Departamento de Zootecnia
País: Brasil
Palavras-chave em Português:
Área do conhecimento CNPq:
Link de acesso: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8416
Resumo: This study aimed to evaluate the effects of different feeding strategies of diets based on cactus cladodes on feed intake, milk yeild and composition, nitrogen balance, microbial protein synthesis and ingestive behavior of Girolando lactating cows. Eight cows at 96.5 ± 7.6 days of lactation with average milk yield of 12.2 ± 0.26 kg day-1 were arranged in two Latin squares (4x4), balanced for residual effects, and fed a diet composed of cactus cladodes, sugarcane and concentrate. The four feeding strategies tested were: total mixed ration (TMR) cactus cladodes associated with concentrate and separated sugarcane (CC+Con/SC) and sugarcane associated with concentrate and separated cactus cladodes. (SC+Con/CC). The diet was formulated to meet the nutritional requirements of cows producing 13 kg day-1 of 4% fat corrected milk. Dry matter (DM, 13.31 ± 0.28 kg day-1), organic matter (OM, 12.27 ± 26 kg day-1), crude protein (CP, 98 ± 0.05 kg day-1), neutral detergent fiber (NDF, 4.48 ± 0.10 kg day-1), non-fibrous carbohydrates (NFC, 6.03 ± 0.20 kg day-1) and total digestible nutrients (TDN, 9.29 ± 0.50 kg day-1). The digestibility of DM (676.76 ± 30.6 g kg-1), OM (704.4 ± 28.4 g kg-1), CP (699.45 ± 49.3 g kg-1), NDF (532.25 ± 58.3 g kg -1) and NFC (854.87 ± 31.6 g kg -1) were not altered by the strategies tested. The different strategies did not influence milk yeild (12.22 ± 0.26 kg d-1), 4% fat corrected milk (13.5 ± 0.34 kg d-1), milk protein (38.97 ± 0.05 g kg-1), milk fat (47.12 ± 0.11 g kg-1), lactosis (42.7 ± 0.03 g kg -1), casein (13.27 ± 0.15 g kg-1), total solids (138.27 ± 0.15 g kg-1) and urea (10.87 ± 1.33 mg dL-1). The nitrogen balance (207.45 ± 9.82 g day-1), microbial protein synthesis (1071 ± 116 g day-1) and microbial protein synthesis efficiency (119.20 ± 2.82 g kg TDN-1) did not change between strategies. The time spent in feeding activities (274.06 ± 8.5 minutes day-1), rumination (435.31 ± 27.64 minutes day-1) and idle time (730.60 ± 35.48 minutes day-1) were not influenced by the different strategies. Animals fed with SC+Con/CC spent more time in feeding at the afternoon (12:00 h to 18:00 h). The MC, as well as the other tested strategies, are options for feeding cactus cladodes based diets without dairy cows impairment performance. The different feeding strategies did not modify the ingestive behavior of the Girolando cows fed with cactus cladodes diet.