MORPHOGENIC AND STRUCTURAL CHARACTERISTICS OF SORGHUM FORAGE SUBMITTED TO THE CONTINUOUS LOTATION WITH SUPPLEMENTED BEEF STEERS

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Abstract

Morphogenesis is a valuable tool for the dynamics understanding of the pasture, however the morphogenetic studies related to sorghum culture are still scarce as well. The objective of the present study was to evaluate the effects of the different levels of supplementation on the morphogenetic characteristics of sorghum forage. The experiment was performed of UFSM from January to April 2013. The completely randomized experimental design was used, with measures repeated in time, with three treatments and two repetitions. The treatments consisted in S 0.8 = sorghum pasture + 0.8 % LW of supplementation, S 1.0 = sorghum pasture + 1.0 % LW of supplementation and S 1.2 = sorghum pasture + 1.2 % LW of supplementation. By increasing the supplementation level offered it was observed a lower value for the Number of Live Leafs (2.77, 3.34 and 3.55) and Leaf Elongation Rate (0.06, 0.09 and 0.08) characteristics. The variables Leaf Appearance Rate (0.0041, 0.0043 and 0.039), Leaf Senescence Rate (0.05, 0.06 and 0.11) and Phyllochron (283.96, 265.21 and 278.62) were not influenced (P?0.05) by the different supplementation levels. There was a difference (P<0.05) among the evaluation periods for Leaf Life Span (1081.1, 986.25 and 788.79) and Leaf Elongation Length (350.58, 312.83 and 326.36). 
Keywords: Phyllochron. Tropical pastures. Supplement levels. Canopy. Leaf elongation rate.

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Author Biographies

Ana Paula Machado Martini, Universidade Federal de Santa Maria

Departamento de Zootecnia- UFSM

 

Ivan Luiz Brondani, Universidade Federal de Santa Maria

Departamento de Zootecnia- UFSM

Viviane Santos da Silva, Universidade Federal de Santa Maria

Departamento de Zootecnia- UFSM

Dari Celestino Alves Filho, Universidade Federal de Santa Maria

Departamento de Zootecnia- UFSM

Patrícia Machado Martini, Universidade Federal de Santa Maria

Departamento de Zootecnia- UFSM

Flânia Mônego Argenta, Universidade Federal de Santa Maria

Departamento de Zootecnia- UFSM

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Published

2019-08-29

How to Cite

MACHADO MARTINI, A. P.; BRONDANI, I. L.; DA SILVA, V. S.; ALVES FILHO, D. C.; MARTINI, P. M.; ARGENTA, F. M. MORPHOGENIC AND STRUCTURAL CHARACTERISTICS OF SORGHUM FORAGE SUBMITTED TO THE CONTINUOUS LOTATION WITH SUPPLEMENTED BEEF STEERS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 20, p. 1–11, 2019. Disponível em: https://revistas.ufg.br/vet/article/view/45172. Acesso em: 17 jul. 2024.

Issue

Vol. 20 (2019): Continuous publication

Section

ZOOTECNIA

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