Response of tall fescue free and infected with endophyte in pure pastures and in mixture with legumes under two frequencies of defoliation

  • Lucas Ricardo Petigrosso Facultad de Ciencias Agrarias - Universidad Nacional de Mar del Plata https://orcid.org/0000-0002-5865-3181
  • María Irastorza Universidad Nacional de Mar del Plata
  • Osvaldo Ramón Vignolio Universidad Nacional de Mar del Plata
  • Silvina San Martino Universidad Nacional de Mar del Plata
  • Mabel Noemí Colabelli Universidad Nacional de Mar del Plata
  • Silvia Graciela Assuero Universidad Nacional de Mar del Plata
Keywords: Festuca, Epichloë coenophiala, Lotus tenuis, Trifolium repens, dilution effect

Abstract

The objectives of the present work were to compare the effect of two defoliation frequencies on the aerial biomass accumulation of a) pure stands of two types of Schedonorus arundinaceus (tall fescue), one from seed harvested from randomly selected individual plants of a natural pasture infected with wild endophyte Epichloë coenophiala (FNE+) and another from a commercial endophyte-free cultivar (FCE-) (Experiment 1) and b) mixed stands of FCE- and FNE+ with legumes (Lotus tenuis and Trifolium repens) (Experiment 2); and c) tall fescue root biomass production in pure and mixed stands above. Two field experiments were carried out. The experiments were conducted in a completely randomized design with a factorial arrangement of two factors: type of tall fescue (FNE+ and FCE-) and frequency of defoliation (AF: high; BF: low), with three replicates. Five and 9 cuts were carried out in BF and AF treatments, respectively (cutting height 70 mm from the ground level). Immediately after the last aerial biomass harvest, tall fescue root biomass was determined in both experiments. Along the experimental period total accumulated aerial biomass production of tall fescue stands (both in pure and mixed stands) was not affected (p>0.05) by the frequency of defoliation nor the type of tall fescue. No significant effects (p>0.05) of the frequency of defoliation and type of tall fescue were detected on root biomass of tall fescue, neither in pure nor in mixed stands.

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Author Biography

Lucas Ricardo Petigrosso, Facultad de Ciencias Agrarias - Universidad Nacional de Mar del Plata

Lucas Ricardo Petigrosso is currently an assistant Professor of Ecology in Faculty of Agrarian Science of the National University of Mar del Plata (FCA-UNMdP), Argentina. He received a B.S. degree in Agricultural (2011) and MSc in Crop Production (2015) from FCA-UNMdP. He has done research on how the various ecological factors influence in the process of transmission of the asymptomatic endophytic fungi in grasses such as tall fescue. This information is indispensable to facilitate the management of symbiosis in productive contexts. He was Associate Editor of Phyton (International Journal of Experimental Botany). He currently is also an editor board member of Journal of Biotechnology Research, Annals of Ecology and Environmental Science and Reviewer of various Journals. He is an evaluator in Science and Technology Fair; major Professor B.S. Thesis in FCA-UNMdP; author and Co-author of publications in refereed scientific journals, Proceedings of National and International Congress.

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Published
2021-12-17
How to Cite
Petigrosso, Lucas Ricardo, María Irastorza, Osvaldo Ramón Vignolio, Silvina San Martino, Mabel Noemí Colabelli, and Silvia Graciela Assuero. 2021. “Response of Tall Fescue Free and Infected With Endophyte in Pure Pastures and in Mixture With Legumes under Two Frequencies of Defoliation”. Latin American Archives of Animal Production 30 (1), 19-28. https://doi.org/10.53588/alpa.300103.
Section
Original paper