Frost tolerance in summer perennial forages in the Southern Region of Brazil
DOI:
https://doi.org/10.52945/rac.v37i2.1826Keywords:
Tillering, Regrowth, Cold toleranceAbstract
In regions with a subtropical climate, like the Southern region of Brazil, it's common to use summer perennial cultivars in pasture-based animal production systems. These cultivars need to be cold-tolerant to survive in the area. This study aimed to assess which summer perennial forage cultivars or species can better withstand winter conditions in a subtropical climate. Ten forage cultivars were evaluated for frost damage on leaves and the percentage of tiller regrowth at 30, 60, 90, and 120 days after the last frost. Species from the genera Panicum (Syn. Megathyrsus) and Brachiaria (Syn. Urochloa) showed the highest percentages of frost damage, while the mission grass and the cultivars Prima and Tifton 85 showed the lowest percentage of damage. The cultivars Braúna and Mavuno did not exhibit tiller regrowth after the cold period. Even though some species are considered "cold-tolerant," the lack of experiments in specific locations may lead to the planting of cultivars in regions where frost could affect their long-term viability.
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Copyright (c) 2024 Cleverson Antônio Sbruzzi, Gustavo Krahl, Daniel Augusto Barreta
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