ABSTRACT. This study evaluated the replacement of Tifton hay with xiquexique (0, 12, 24 and 36%) on feeding behavior of lactating dairy cows. To this end, eight cows with average milk production of 15 kg milk day -1 and average body weight of 465.2 ± 39.4 kg were distributed in a double 4x4 Latin square. Each experimental period lasted 16 days, ten for adaptation and six for data collection. The record of behavioral variables was made every five min. for 24 hours. The times spent in feeding, ruminating and total chewing, expressed in hours day -1 , as well as feeding (FE) and rumination (RE) efficiencies, expressed in g NDF h -1 , the number of cuds and cud chews per day showed a linear decrease according to the levels of xiquexique in the diet. There was a linear increase in time in idleness. Xiquexique levels in the diet for dairy cows did not influence FE and RE, expressed in g DM h -1 , number and time spent in chewing per cud. The replacement of Tifton hay with xiquexique in the diet alters the feeding behavior of dairy cows due to the reduction in fiber content.Keywords: cactaceous, fiber, chewing, resting, Pilosocereus gounellei, rumination. Comportamento ingestivo de vacas em lactação alimentadas com diferentes níveis de xiquexique (Pilosocereus gounellei)RESUMO. Este trabalho foi realizado para avaliar a substituição do feno de capim-tifton por xiquexique (0, 12, 24 e 36%) sobre o comportamento ingestivo de vacas leiteiras em lactação. Foram utilizadas oito vacas com produção média de 15 kg de leite dia -1 e com peso corporal médio de 465,2 ± 39,4 kg, distribuídas em quadrado latino 4x4, duplo. Cada período experimental teve duração de 16 dias, sendo dez para adaptação e seis para coleta de dados. O registro das variáveis comportamentais foi realizado a intervalos de 5 min. durante 24h. Os tempos de alimentação, ruminação e mastigação total, expressos em hora dia -1 , além da eficiência de alimentação (EAL) e de ruminação (ERU) expressas em g FDN h -1 , o número de bolos ruminais e de mastigação merícicas por dia, diminuíram linearmente com os níveis de xiquexique nas rações experimentais. Houve aumento linear no tempo em ócio. Os níveis de xiquexique na ração de vacas leiteiras não influenciaram a EAL e ruminação ERU expressas em g MS h -1, número e tempo de mastigação merícica por bolo. A substituição do feno de capim-tifton por xiquexique na ração modifica o comportamento ingestivo de vacas em lactação em decorrência da redução dos teores de fibra.
Consumo AbstractThe aim of the present study was to evaluate the effect of substituting Tifton-85 grass hay with different quantities of xiquexique (Pilosocereus gounellei) (0, 12, 24, and 36%) on the nutrient intake and physiological responses of lactating dairy cows. Eight multiparous crossbred cows at approximately 100 days in milk, with an average milk yield of 15 kg of milk per day -1 , and an average body weight (BW) of 465.20 ± 39.37 kg, were distributed in a 4 × 4 double Latin square design. Each experimental period lasted 16 days, consisting of 10 days for adaptation and 6 days for data collection, giving a total of 64 experimental days. The roughage: concentrate ratio was 60:40, on a dry matter (DM) basis. The DM intake, expressed in kg day -1 , was affected quadratically by the levels of xiquexique in the diets. The intakes of DM, expressed in % BW and g kg -0.75, and neutral detergent fiber (NDF) in the three units analyzed (kg day -1 , % BW, and g kg -0.75 ), as well as the intakes of organic matter (OM), crude protein (CP), ether extract (EE), and total carbohydrates (TC), expressed in kg/day -1 , decreased linearly with the levels of xiquexique in the diet. Milk yield (kg day -1 ) was reduced by the addition of xiquexique into the diet, but feed efficiency was not influenced. Water intake from feed (WI Feed ), expressed in kg day -1 and % BW, incresed linearly with increasing levels of xiquexique in the total diet, while voluntary water intake, expressed in kg day -1 and % BW (WI Voluntary ), decreased linearly. The total water intake (WI Total ) was not affected by experimental treatments. Participation of WI Voluntary in the WI Total linearly reduced with Xiquexique levels in the diet. The respiratory rate and surface temperature during both periods of the day (morning and afternoon), and rectal temperature during the morning were not influenced by the levels of xiquexique in the diet. Therefore, xiquexique can be utilized in the feeding of medium and high producing dairy cows, as a means of reducing nutrient intake, milk yield, and voluntary consumption of water without changing feed efficiency or the animals' physiological responses. ResumoO presente estudo foi conduzido com o objetivo de avaliar o efeito de diferentes níveis de xiquexique (0, 12, 24 e 36%) em substituição ao feno de capim Tifton 85 sobre o consumo de nutrientes e respostas fisiológicas de vacas leiteiras em lactação. Foram utilizadas oito vacas mestiças pluríparas, com aproximadamente 100 dias em lactação, produção média de 15 kg de leite dia -1 e com peso corporal (PC) médio de 465,20 ± 39,37 kg. Os animais foram distribuídos em delineamento em quadrado latino 4x4, duplo. Cada período teve duração de 16 dias, sendo 10 dias de adaptação e 6 dias de coleta de dados, totalizando 64 dias experimentais. A relação volumoso:concentrado foi de 60:40, com base na matéria seca (MS). O consumo de MS, expresso em kg dia -1 , foi influenciado de forma quadrática pelos níveis de xiquexique nas rações. O consumo de MS expresso em % PC e g...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.