Ecophysiology of Andropogon grass subjected to different cutting frequencies and intensities

Detalhes bibliográficos
Autor(a) principal: Lima,Juliana R. L.
Data de Publicação: 2020
Outros Autores: Rodrigues,Rosane C., Sousa,Giovanne O. C., Costa,Clésio dos S., Parente,Henrique N., Santos,Francisco N. de S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000900610
Resumo: ABSTRACT The objective of this study was to evaluate the morphogenic and structural characteristics, and demographic patterns of Andropogon gayanus subjected to different cutting frequencies and intensities. A completely randomized design was adopted in a 3 × 2 factorial arrangement, corresponding to three cutting heights (50, 70, and 90 cm), and two cutting intensities (50 and 70%) with four repetitions, totaling 24 plots of 7.50 × 6.25 m. For morphogenesis, there was no interaction effect (P ≤ 0.05) of treatments on stem elongation rate, leaf appearance rate, and phyllochron rate. The highest rate of leaf elongation was observed at a height of 90 cm and cut intensity of 50%, with 1.69 and 0.84 cm tiller-1 d-1 of leaf elongation at heights of 50 and 70 cm, respectively. For forage production, there was no interaction (p > 0.05) between cutting intensity and cutting height. When the pasture was managed to a cutting height of 90 cm, there was a greater increase in dry leaf mass, stalk dry mass, dead forage dry mass, and total dry forage mass, which was 50.89% and 53.29% higher than pasture heights of 50 and 70 cm, respectively. There was no interaction between factors on demographic characteristics (p > 0.05). A cutting height of 70 cm with a cutting intensity of 50% is recommended when handling this grass.
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spelling Ecophysiology of Andropogon grass subjected to different cutting frequencies and intensitiesAndropogon gayanuscutting heightmorphogenic characteristicsforage productionABSTRACT The objective of this study was to evaluate the morphogenic and structural characteristics, and demographic patterns of Andropogon gayanus subjected to different cutting frequencies and intensities. A completely randomized design was adopted in a 3 × 2 factorial arrangement, corresponding to three cutting heights (50, 70, and 90 cm), and two cutting intensities (50 and 70%) with four repetitions, totaling 24 plots of 7.50 × 6.25 m. For morphogenesis, there was no interaction effect (P ≤ 0.05) of treatments on stem elongation rate, leaf appearance rate, and phyllochron rate. The highest rate of leaf elongation was observed at a height of 90 cm and cut intensity of 50%, with 1.69 and 0.84 cm tiller-1 d-1 of leaf elongation at heights of 50 and 70 cm, respectively. For forage production, there was no interaction (p > 0.05) between cutting intensity and cutting height. When the pasture was managed to a cutting height of 90 cm, there was a greater increase in dry leaf mass, stalk dry mass, dead forage dry mass, and total dry forage mass, which was 50.89% and 53.29% higher than pasture heights of 50 and 70 cm, respectively. There was no interaction between factors on demographic characteristics (p > 0.05). A cutting height of 70 cm with a cutting intensity of 50% is recommended when handling this grass.Departamento de Engenharia Agrícola - UFCG2020-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000900610Revista Brasileira de Engenharia Agrícola e Ambiental v.24 n.9 2020reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)instname:Universidade Federal de Campina Grande (UFCG)instacron:UFCG10.1590/1807-1929/agriambi.v24n9p610-615info:eu-repo/semantics/openAccessLima,Juliana R. L.Rodrigues,Rosane C.Sousa,Giovanne O. C.Costa,Clésio dos S.Parente,Henrique N.Santos,Francisco N. de S.eng2020-08-19T00:00:00Zoai:scielo:S1415-43662020000900610Revistahttp://www.scielo.br/rbeaaPUBhttps://old.scielo.br/oai/scielo-oai.php||agriambi@agriambi.com.br1807-19291415-4366opendoar:2020-08-19T00:00Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)false
dc.title.none.fl_str_mv Ecophysiology of Andropogon grass subjected to different cutting frequencies and intensities
title Ecophysiology of Andropogon grass subjected to different cutting frequencies and intensities
spellingShingle Ecophysiology of Andropogon grass subjected to different cutting frequencies and intensities
Lima,Juliana R. L.
Andropogon gayanus
cutting height
morphogenic characteristics
forage production
title_short Ecophysiology of Andropogon grass subjected to different cutting frequencies and intensities
title_full Ecophysiology of Andropogon grass subjected to different cutting frequencies and intensities
title_fullStr Ecophysiology of Andropogon grass subjected to different cutting frequencies and intensities
title_full_unstemmed Ecophysiology of Andropogon grass subjected to different cutting frequencies and intensities
title_sort Ecophysiology of Andropogon grass subjected to different cutting frequencies and intensities
author Lima,Juliana R. L.
author_facet Lima,Juliana R. L.
Rodrigues,Rosane C.
Sousa,Giovanne O. C.
Costa,Clésio dos S.
Parente,Henrique N.
Santos,Francisco N. de S.
author_role author
author2 Rodrigues,Rosane C.
Sousa,Giovanne O. C.
Costa,Clésio dos S.
Parente,Henrique N.
Santos,Francisco N. de S.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Lima,Juliana R. L.
Rodrigues,Rosane C.
Sousa,Giovanne O. C.
Costa,Clésio dos S.
Parente,Henrique N.
Santos,Francisco N. de S.
dc.subject.por.fl_str_mv Andropogon gayanus
cutting height
morphogenic characteristics
forage production
topic Andropogon gayanus
cutting height
morphogenic characteristics
forage production
description ABSTRACT The objective of this study was to evaluate the morphogenic and structural characteristics, and demographic patterns of Andropogon gayanus subjected to different cutting frequencies and intensities. A completely randomized design was adopted in a 3 × 2 factorial arrangement, corresponding to three cutting heights (50, 70, and 90 cm), and two cutting intensities (50 and 70%) with four repetitions, totaling 24 plots of 7.50 × 6.25 m. For morphogenesis, there was no interaction effect (P ≤ 0.05) of treatments on stem elongation rate, leaf appearance rate, and phyllochron rate. The highest rate of leaf elongation was observed at a height of 90 cm and cut intensity of 50%, with 1.69 and 0.84 cm tiller-1 d-1 of leaf elongation at heights of 50 and 70 cm, respectively. For forage production, there was no interaction (p > 0.05) between cutting intensity and cutting height. When the pasture was managed to a cutting height of 90 cm, there was a greater increase in dry leaf mass, stalk dry mass, dead forage dry mass, and total dry forage mass, which was 50.89% and 53.29% higher than pasture heights of 50 and 70 cm, respectively. There was no interaction between factors on demographic characteristics (p > 0.05). A cutting height of 70 cm with a cutting intensity of 50% is recommended when handling this grass.
publishDate 2020
dc.date.none.fl_str_mv 2020-09-01
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000900610
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dc.relation.none.fl_str_mv 10.1590/1807-1929/agriambi.v24n9p610-615
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dc.publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
dc.source.none.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental v.24 n.9 2020
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