Abstract #T176
Section: Forages and Pastures
Session: Forages and Pastures: Silages and forages in beef and sheep production systems
Format: Poster
Day/Time: Tuesday 7:30 AM–9:30 AM
Location: Gatlin Ballroom
Session: Forages and Pastures: Silages and forages in beef and sheep production systems
Format: Poster
Day/Time: Tuesday 7:30 AM–9:30 AM
Location: Gatlin Ballroom
# T176
Tiller population stability index from the spring in palisadegrass previously used in deferred grazing.
Simone Pedro da Silva*1, Manoel Eduardo Rozalino Santos2, Bruno Humberto Rezende Carvalho2, Ludiêmilem Keith Parreira da Costa2, Denis Douglas Pessoa2, Heron Alves de Oliveira2, Róger Carvalho Cardoso2, Miriã Gonçalves Simplício2, Dilermando Miranda da Fonseca3, 1Instituto Federal Goiano, Hidrolândia, Goias, Brazil, 2Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil, 3Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.
Key Words: grazing, seasons of the year, sward height
Tiller population stability index from the spring in palisadegrass previously used in deferred grazing.
Simone Pedro da Silva*1, Manoel Eduardo Rozalino Santos2, Bruno Humberto Rezende Carvalho2, Ludiêmilem Keith Parreira da Costa2, Denis Douglas Pessoa2, Heron Alves de Oliveira2, Róger Carvalho Cardoso2, Miriã Gonçalves Simplício2, Dilermando Miranda da Fonseca3, 1Instituto Federal Goiano, Hidrolândia, Goias, Brazil, 2Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil, 3Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.
We evaluated the effect of pasture condition previously deferred and on late winter on regrowth of Brachiaria brizantha ‘Marandu’ (palisadegrass). From October 2013 to January 2014, the palisadegrass pastures were evaluated at the Federal University of Uberlândia, located in the State of Minas Gerais, Brazil. The experimental site was located at 776 m altitude, 18°30′ S and 47°50′ W. Annual precipitation was around 1.584 mm. Medium temperature was 22.3°C. The tiller dynamics was evaluated in deferred pastures with 4 conditions to late winter. The pastures conditions were low (15.1 cm), medium (23.2 cm), high (31.4 cm) and high/cutting (31.3 cm and cutting to 8.0 cm). The experiment was carried out using a randomized completely design with 3 repetitions and subdivided plots. In each experimental unit (paddocks), all tillers inside the 3 frames with 0.0625 m2 were counted and marked with colored plastic. Every 30 d, all tillers were recounted and new tillers were marked with a different wire color. The collected data were used to calculate the tiller population stability index (SI). During spring and early summer, all pastures were kept with 30 cm in continuous stocking, with sheep. There were interactions (P < 0.05) of months with pasture conditions for SI. In October, the low (2.3) and high/cutting (2.2) pastures showed (P < 0.05) higher SI, followed by medium (1.7) and high (1.4) pasture, respectively. For other months, there was no effect of pasture conditions on SI. The SI was higher in low and high/cutting pastures, due to high tillering these pastures. The SI was less than or equal to one unit only in November (0.9) and December (1.0). The high development of shoots in tillers in October may have generated higher shading at plant base in November and December, causing decrease in SI. The lower and deferred palisadegrass pastures in late winter have a higher SI from early spring, compared with higher pastures. We conclude that cutting of high palisadegrass pasture in late winter improves the tiller population stability index from the spring.
Key Words: grazing, seasons of the year, sward height
