The use of light-transparent acetate sheet to measure canopy height of marandu palisadegrass: the influence of development stage and sward height

Authors

  • Manoel Eduardo Rozalino Santos Universidade Federal de Uberlândia https://orcid.org/0000-0002-3668-4518
  • Guilherme Portes Silva Universidade de São Paulo
  • Gabriel de Oliveira Rocha Universidade Federal de Uberlândia
  • Bruno Humberto Rezende Carvalho Universidade Federal de Uberlândia https://orcid.org/0000-0002-3668-4518
  • Kimberly Barcelos Gois Universidade Federal de Uberlândia
  • Lorena Carla Adorno Universidade Federal de Uberlândia https://orcid.org/0000-0002-8484-2429

DOI:

https://doi.org/10.14393/BJ-v38n0a2022-53924

Keywords:

Height Measurement, Reproductive Tiller, Tropical Grass, Urochloa brizantha.

Abstract

The use of light-transparent acetate sheet (LAS) may generate variations in the height measured in the sward. However, we compared the use or non-use of LAS to measure the average sward height of marandu palisadegrass (Urochloa brizantha syn. Brachiaria brizantha cv. Marandu) pastures. In the first experiment, the methods were applied in pastures with different average heights (15, 25, 35, and 45 cm), managed under continuous stocking with sheep, and with predominance of vegetative tillers. The shorter pastures (15 and 25 cm) had similar heights with or without the use of the LAS. However, in the taller pastures (35 and 45 cm), the use of LAS resulted in lower height values, compared with its absence. In the second experiment, we compared both methods for measuring the height of deferred marandu palisadegrass and fertilized with two nitrogen levels (50 and 200 kg ha-1) and with high presence of reproductive tillers. A completely randomized design with four replicates was adopted. With 200 kg ha-1 of N, the canopy height was greater than when it was fertilized with 50 kg ha-1 of N. With the use of LAS, the height of deferred and reproductive canopy was greater than without it. In a taller marandu palisadegrass pasture with predominance of vegetative tillers, the use of LAS results in smaller height, contrary to what occurs in deferred swards with reproductive tillers.

Downloads

Download data is not yet available.

References

ALVARES, C.A., et al. KÖPPEN’S climate classification map for brazil. Meteorologische Zeitschrift. 2013, 22(6), 711-728. https://doi.org/10.1127/0941-2948/2013/0507

da SILVA, S.C. and NASCIMENTO Jr, D. Avanços na pesquisa com plantas forrageiras tropicais em pastagens: características morfofisiológicas e manejo do pastejo. Revista Brasileira de Zootecnia. 2007, 36, 121-138. https://doi.org/10.1590/S1516-35982007001000014

GIMENES, F.M.A., et al. Ganho de peso e produtividade animal em capim-marandu sob pastejo rotativo e adubação nitrogenada. Pesquisa Agropecuária Brasileira. 2011, 46(7), 751-759. https://doi.org/10.1590/S0100-204X2011000700011

NANTES, N.N., et al. Desempenho animal e características de pastos de capim-piatã submetidos a diferentes intensidades de pastejo. Pesquisa Agropecuária Brasileira. 2013, 48(1), 114-121. https://doi.org/10.1590/S0100-204X2013000100015

PAIVA, A.J., et al. Morphogenesis on age categories of tillers in marandu palisadegrass. Scientia Agricola. 2011, 68(6), 626-631. https://doi.org/10.1590/S0103-90162011000600003

PAULA, C.C.L., et al. Acúmulo de forragem, características morfogênicas e estruturais do capim-marandu sob alturas de pastejo. Ciência Rural. 2012, 42(11), 2059-2065. https://doi.org/10.1590/S0103-84782012005000084

PEDREIRA, C.G.S., PEDREIRA, B.C. and TONATO, F. Quantificação da massa e da produção de forragem em pastagens. Anais do 22º Simpósio sobre Manejo da Pastagem, Teoria e prática da produção animal em pastagens, Piracicaba, 2005, 195-216.

PEDREIRA, C.G.S., et al. Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass. Pesquisa Agropecuária Brasileira. 2018, 53(1), 113-120. https://doi.org/10.1590/s0100-204x2018000100013

PESSOA, D.D., et al. Tillering of Marandu palisadegrass maintained at fixed or variable heights throughout the year. Tropical Grasslands - Forrajes Tropicales. 2016, 4(2), 101-111. https://doi.org/10.17138/tgft(4)101-111

SANTOS, M.E.R., FONSECA, D.M. and GOMES, V.M. Forage accumulation in brachiaria grass under continuous grazing with single or variable height during the seasons of the year. Revista Brasileira de Zootecnia. 2013, 42(5), 312-318. https://doi.org/10.1590/S1516-35982013000500002

SBRISSIA, A.F., et al. Tillering dynamics in palisadegrass swards continuously stocked by cattle. Plant Ecology. 2010, 206(2), 349-359. https://doi.org/10.1007/s11258-009-9647-7

YASUOKA, J.I., et al. Canopy height and N affect herbage accumulation and the relative contribution of leaf categories to photosynthesis of grazed Brachiaria grass pastures. Grass and Forage Science. 2018, 73(1), 183-192. https://doi.org/10.1111/gfs.12302

Downloads

Published

2022-03-31

How to Cite

SANTOS, M.E.R., GUILHERME PORTES SILVA, GABRIEL DE OLIVEIRA ROCHA, BRUNO HUMBERTO REZENDE CARVALHO, KIMBERLY BARCELOS GOIS and LORENA CARLA ADORNO, 2022. The use of light-transparent acetate sheet to measure canopy height of marandu palisadegrass: the influence of development stage and sward height. Bioscience Journal [online], vol. 38, pp. e38021. [Accessed10 August 2022]. DOI 10.14393/BJ-v38n0a2022-53924. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/53924.

Issue

Section

Agricultural Sciences