Influence of integrated crop-livestock-forest on morphological composition and nutritional value of Marandu palisadegrass under continuous grazing

Authors

DOI:

https://doi.org/10.5433/1679-0359.2021v42n6p3415

Keywords:

Morphological composition, Digestibility, Leaf, stem ratio, Urochloa brizantha.

Abstract

This study characterizes the changes in leaf mass, morphological composition and nutritional value of leaf blades of palisadegrass (Urochloa brizantha cv. Marandu) under continuous grazing in the first year of implementation of pasture and after second year of the eucalyptus planting in an Integrated Crop-Livestock System and Integrated Crop-Livestock-Forest, which were tested in the four seasons. The experimental design was in random blocks, with three treatments: Crop-Livestock System (ICL) and Integrated Crop-Livestock-Forest with two eucalyptus tree densities (ICLF-1L, 196 eucalyptus trees ha-1 and ICLF-3L, 448 eucalyptus trees ha-1) and four replicates. Sixty castrated Nellore cattle with initial weight of 235.43 ± 25.46 kg and mean age of 16 ± 2.81 months were used during the growing phase under continuous grazing. The agronomic variables were: total dry mass of forage, leaves, stem and dead material; leaf:stem and live:senescent material ratios; and accumulation rate. The leaf:stem and live: senescent material relation did not obtain any difference between the evaluated systems. Dry matter, crude protein, fiber fractions and digestibility of leaf blades were evaluated. Dry mass of the forage (6775 kg ha-1), stem (2175 kg ha-1), senescent material (3175 kg ha-1) and dry matter content (28.6%) were greater in the ICL, whereas crude protein (11.3%) was greater in the ICLFs. On the other hand, accumulation rate and dry mass of leaf blades did not change between systems. Thus, until the first year of grazing, tree systems have advantages, because the forage production (accumulation rate) and leaf mass are similar to those of plants in full sun, besides showing higher nutritional value.

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Author Biographies

Erikelly Aline Ribeiro Santana, Universidade Estadual de São Paulo

Doctoral Scholar of Post Graduate Program in Animal Science, School of Veterinary Medicine and Animal Science, Universidade Estadual de São Paulo, UNESP, Botucatu, SP, Brazil.

Ciniro Costa, Universidade Estadual de São Paulo

Prof. of Post Graduate Program in Animal Science, School of Veterinary Medicine and Animal Science, UNESP, Botucatu, SP, Brazil.

Paulo Roberto de Lima Meirelles, Universidade Estadual de São Paulo

Prof. of School of Veterinary Medicine and Animal Science, UNESP, Botucatu, SP, Brazil.

Cristiana Andrighetto, Universidade Estadual de São Paulo

Prof. of Post Graduate Program in Animal Science in Animal Science and Technology, College of Agricultural and Technological Sciences, UNESP, Dracena, SP, Brazil.

Gustavo Pavan Mateus, Agência Paulista de Tecnologia do Agronegócio

Researcher in Agência Paulista de Tecnologia do Agronegócio, APTA, Andradina, SP, Brazil.

Patrícia Aparecida da Luz, Universidade Estadual de São Paulo

Profa. of College of Agricultural and Technological Sciences, UNESP, Dracena, SP, Brazil.

Aline Sampaio Aranha, Universidade Estadual de São Paulo

Doctoral Scholar of Post Graduate Program in Animal Science, School of Veterinary Medicine and Animal Science, Universidade Estadual de São Paulo, UNESP, Botucatu, SP, Brazil.

Gelci Carlos Lupatini, Universidade Estadual de São Paulo

Prof. of College of Agricultural and Technological Sciences, UNESP, Dracena, SP, Brazil.

Cleunice Auxiliadora Fialho, Universidade Estadual de São Paulo

Researcher in School of Veterinary Medicine and Animal Science, UNESP, Botucatu, SP, Brazil.

Helena Sampaio Aranha, Universidade Estadual de São Paulo

Undergraduate student in Post Graduate Program in Animal Science in Animal Science and Technology, College of Agricultural and Technological Sciences, UNESP, Dracena, SP, Brazil.

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Published

2021-08-12

How to Cite

Santana, E. A. R., Costa, C., Meirelles, P. R. de L., Andrighetto, C., Mateus, G. P., Luz, P. A. da, … Aranha, H. S. (2021). Influence of integrated crop-livestock-forest on morphological composition and nutritional value of Marandu palisadegrass under continuous grazing. Semina: Ciências Agrárias, 42(6), 3415–3430. https://doi.org/10.5433/1679-0359.2021v42n6p3415

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