Forage production and crude protein content of perennial warm-season grasses under fertilization

  • J. H. Veneciano INTA, EEA San Luis (Villa Mercedes, San Luis)
  • K. L. Frigerio INTA, EEA San Luis (Villa Mercedes, San Luis)
  • C. A. Frasinelli INTA, EEA San Luis (Villa Mercedes, San Luis)

Keywords:

forage grasses, defoliation, forage production, crude protein, quality

Abstract

The essay was carried out to determine the effect of defoliation frequency on yields, dry matter composition and protein content in three Old World bluestems cultivars (Bothriochloa sp cv. Dahl, Spar, Plains) and one of sideoats grama (Bouteloua curtipendula (Mich.) Torrey cv. Vaughn) on the growth season. Defoliation (4 frequencies) and participants were arranged within a split plot design. Yields of whole plant dry matter (WPY) and blade (LY) -kg.ha-1.y-1, crude protein content In L (CP, %), yield of CP of L (CPY, kg.ha-1.y-1) and mean values of growth rate (gr, kgDM.ha-1.d-1) for WP and L were measured. Data were analyzed by proc GLM (SAS) and means were compared by Tukey test (p<0,05). Accumulated mean values: Dahl had the highest LY; between treatments, except Dahl, the lowest values Of LY,' CP and CPY corresponded to T4 (single cut). Discriminated cutting values: in T l -T2 the WPY, LY and CPY of the 2 first cuttings were significative higher (even with exceptions), corresponding the upper cut rates to cutting 2. CP content was lowest in cutting 1, by senescence of L. It is concluded that cv. Dahl is the best of the forage species and cultivars under evaluation, due to its high LY when defoliated at frequencies of 28, 35 or 45 days. At these frequencies, the leaves harvested a CP concentration of at least 8%.

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References

National Research Council. 1973. Necesidades nutritivas del ganado vacuno de carne. Consejo Nac. de Investigaciones, 1°. Edit. Hemisferio Sur S.A.: 77 p.

Rabotnikot, CM.; O.A. Hernández; N.P. Stritzler, M. Gallardo; E. Funes & C.A. Villar. 1986a. Evaluación de especies forrajeras estivales en la región pampeana semiárida. I. Determinación de pared celular, lignina y desaparición de materia seca en bolsitas de B. intermedia, E. curvula, D. eriantha, P. antidotaie y S. leiantha bajo condiciones de diferimiento. Rev. Arg. Prod. Anim. 6:47-56.

Rabotnikof, CM. ; N.P. Stritzler & O.A. Hernandez. 1986b. Evaluacidn de especies forrajeras estivales en la región pampeana semiárida. I.Determinación de producción de materia seca, persistencia, proteína y digestibilidad in vitro de B. intermedia, E. curvula, D. eriantha, P. antidotaiey S. leiantha bajo condiciones de diferimiento. Rev. Arg. Prod. Anim. 6:57-66.

Veneciano, J.H. 1999. Evaluación preliminar de tres cultivares de Bothriochloa sp.: rendimiento de materia seca y contenido proteico. Inf. tecnica 150 (EEA San Luis, INTA) 31 p.

Veneciano, J.H.; M.A. Rosa & J.D. Giulietti. 1994. La introducción de germoplasmas fon-ajeros en San Luis. Una somera descripción de recursos promisorios. CVT EEA San Luis (INTA) / Forrajeras Avanzadas S.A. 48 p.

Veneciano, J.H.; O.A. Terenti & M.E. Federigi. 2000. Villa Mercedes (San Luis): reseña climática del siglo XX. Inf. técnica 156 (EEA San Luis, INTA). 45 p.

Whyte, R.O.; T.R.G. Moir & J.R Cooper. 1971. Las gramíneas en la agricultura. Estudios agropecuarios 42, FAO (3ra ed.). 443 p.

Published

2020-04-07

How to Cite

Veneciano, J. H., Frigerio, K. L., & Frasinelli, C. A. (2020). Forage production and crude protein content of perennial warm-season grasses under fertilization. Semiárida, 15(1/2), 43–55. Retrieved from https://ojs.unlpam.edu.ar/index.php/semiarida/article/view/4630

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Section

Artículos Científicos y Técnicos