The sward height at the early stockpiling period modifies the structural characteristics of marandu palisadegrass under continuous stocking

Manoel Eduardo Rozalino Santos; Gabriel de Oliveira Rocha; Bruno Humberto Rezende Carvalho; Simone Pedro da Silva; Lorena Carla Adorno; Kimberly Barcelos Gois

doi:10.14393/BJ-v38n0a2022-53918

Authors

Manoel Eduardo Rozalino Santos Universidade Federal de Uberlândia https://orcid.org/0000-0002-3668-4518
Gabriel de Oliveira Rocha Universidade Federal de Uberlândia
Bruno Humberto Rezende Carvalho Universidade Federal de Uberlândia
Simone Pedro da Silva Universidade Federal de Uberlândia
Lorena Carla Adorno Universidade Federal de Uberlândia
Kimberly Barcelos Gois Universidade Federal de Uberlândia

DOI:

https://doi.org/10.14393/BJ-v38n0a2022-53918

Keywords:

Brachiaria brizantha syn. Urochloa brizantha, Falling index, Forage mass, Morphological composition, Urochloa brizantha, Tiller number.

Abstract

The control of sward height at the early stockpiling period influences the structural characteristics of stockpiled sward in winter. So, we conducted this work on the Cerrado region of Brazil based on the hypothesis that the reduction of pasture height at the beginning of stockpiling period results in: (i) lower stock of forage mass; and (ii) higher live leaf mass, but lower stem mass in stockpiled pasture during the winter. The treatments were four sward heights (15, 25, 35, and 45 cm) at early stockpiling period of marandu palisadegrass (Brachiaria brizantha syn. Urochloa brizantha cv. Marandu). The experiment was conducted in a completely randomized design, with three replications (paddocks with 800 m²). The stockpiled swards were evaluated during the grazing period in winter on days 7 (beginning), 45 (middle) and 90 (end). The vegetative tiller number (VEGT), live leaf mass (LLM) and leaf area index (LAI) were greater in the 15 cm stockpiled pasture than the other treatments. Greater heights (35 and 45 cm) at stockpiling resulted in greater forage mass than lower heights (15 and 25 cm). The VEGT, LLM, number of reproductive tillers, live stem mass, forage mass and LAI values were higher at the beginning than at the end of the grazing period. Our hypothesis has been proven, so that the reduction of sward height of the marandu palisadegrass at the beginning of the stockpiling period results in lesser forage mass, but with better structural characteristics.

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References

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