The effect of different levels of tree cover on milk production in dual-purpose livestock systems in the humid tropics o
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The effect of different levels of tree cover on milk production in dual-purpose livestock systems in the humid tropics of the Colombian Amazon region ´ lvarez . Fernando Casanoves . Juan Carlos Sua´rez Faver A
. Danilo Pezo
Received: 25 April 2020 / Accepted: 27 October 2020 Ó Springer Nature B.V. 2020
Abstract Caqueta´, Colombia, has a bovine population of 1,809,702 head, of which 88% are in dual purpose livestock systems; it ranks fifth in milk production at the national level. The aim of this study was to evaluate the effect of different levels of tree cover on milk production in dual-purpose livestock systems in the humid tropics of Colombia’s Amazon region. The work was carried out in the Centro de Investigaciones Amazonicas CIMAZ Macagual. It is within the tropical humid forest life zone. Nine
pastures of one hectare each were selected, covered by improved pastures (Brachiaria decumbes) and dispersed trees. Treatments were defined by the percentage of tree cover: (1) high (20.43 ± 0.47), (2) medium (14.83 ± 0.58) and (3) low (4.20 ± 0.85). The spatial distribution of the dispersed trees was obtained using the SexI-FS simulator. Nine milking cows with similar characteristics were selected and managed following a 3 9 3 Latin square experimental design (Cross Over), repeated three
´ lvarez F. A Programa Doctorado Ciencias Naturales y Desarrollo Sustentable, Facultad de Ciencias Agropecuarias, Universidad de la Amazonia, Florencia, Caqueta´, Colombia
J. C. Sua´rez Maestria Sistemas Sostenibles de produccio´n, Facultad de Ciencias Agropecuarias, Universidad de la Amazonia, Florencia, Caqueta´, Colombia
´ lvarez F. A Programa de Medicina Veterinaria y Zootecnia, Facultad de Ciencias Agropecuarias, Universidad de la Amazonia, Florencia, Caqueta´, Colombia
J. C. Sua´rez Centro de Investigaciones Amazo´nicas CIMAZ Macagual, Grupo de Investigaciones Agroecosistemas y Conservacio´n en Bosques Amazo´nicos-GAIA, Florencia, Caqueta´, Colombia
´ lvarez F. A Centro de Investigaciones Amazo´nicas CIMAZ Macagual, Grupo de Investigacio´n en Sistemas Agroforestales para la Amazonia, GISAPA, Florencia, Caqueta´, Colombia
J. C. Sua´rez (&) Programa de Ingenierı´a Agroecolo´gica, Facultad de Ingenierı´a, Universidad de la Amazonia, Florencia, Caqueta´, Colombia e-mail: [email protected]
F. Casanoves D. Pezo CATIE-Centro Agrono´mico Tropical de Investigacio´n y Ensen˜anza, 30501 Turrialba, Costa Rica
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Agroforest Syst
times. The ANOVA using the general linear mixed model revealed that milk production varied with the levels of tree cover (p \ 0.05), getting the highest milk production with the medium and high level of tree cover, (4.43 ± 0.21 and 4.39 ± 0.21 kg cow- 1 day- 1 respectively), followed by the low levels of tree cover (4.13 ± 0.21 kg cow- 1 day- 1). Keywords Animal thermal comfort Dispersed trees in pastures Milk production Silvopastoral systems
Introduction The department of Caqueta´, Colombia, has 1,809,702 head of cattle, with 88% managed in d
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