Levels of defoliation and regrowth dynamics in elephant grass swards
The morphogenetic and structural characteristics of forage plants and the processes of growth and senescence in tissues may vary according to the grazing management strategies used. This research aimed to assess the process of regrowth in elephant grass swards Cv. 'Pioneiro' submitted to two pre-grazing heights (90 and 120cm) combined with two levels of defoliation (50 and 70%). A reduction of the leaf elongation rate (LER) was observed during the regrowth stages, in addition to a reduction in the rate of leaf appearance (LAR) and aerial tiller population density (ATPD). In contrast, an increase was observed in leaf senescence (LSR) and stem and pseudo stem elongation rates (SER). The severe defoliation (70%) combined with a pre-grazing height of 120cm compromised the regrowth of elephant grass cv. 'Pioneiro', which must be managed with a maximum height of 90cm and maximum level of defoliation of 50% of the initial height.
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Universidade Federal de Santa Maria
2015
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oai:scielo:S0103-847820150007012992015-07-15Levels of defoliation and regrowth dynamics in elephant grass swardsRodolfo,Giselle ReginaSchmitt,DanielDias,Kamila MacielSbrissia,André Fischer morphogenesis regrowth stages Pennisetum purpureum grazing management pioneiro-grass. The morphogenetic and structural characteristics of forage plants and the processes of growth and senescence in tissues may vary according to the grazing management strategies used. This research aimed to assess the process of regrowth in elephant grass swards Cv. 'Pioneiro' submitted to two pre-grazing heights (90 and 120cm) combined with two levels of defoliation (50 and 70%). A reduction of the leaf elongation rate (LER) was observed during the regrowth stages, in addition to a reduction in the rate of leaf appearance (LAR) and aerial tiller population density (ATPD). In contrast, an increase was observed in leaf senescence (LSR) and stem and pseudo stem elongation rates (SER). The severe defoliation (70%) combined with a pre-grazing height of 120cm compromised the regrowth of elephant grass cv. 'Pioneiro', which must be managed with a maximum height of 90cm and maximum level of defoliation of 50% of the initial height.info:eu-repo/semantics/openAccessUniversidade Federal de Santa MariaCiência Rural v.45 n.7 20152015-07-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000701299en10.1590/0103-8478cr20141094 |
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Rodolfo,Giselle Regina Schmitt,Daniel Dias,Kamila Maciel Sbrissia,André Fischer |
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Rodolfo,Giselle Regina Schmitt,Daniel Dias,Kamila Maciel Sbrissia,André Fischer Levels of defoliation and regrowth dynamics in elephant grass swards |
| author_facet |
Rodolfo,Giselle Regina Schmitt,Daniel Dias,Kamila Maciel Sbrissia,André Fischer |
| author_sort |
Rodolfo,Giselle Regina |
| title |
Levels of defoliation and regrowth dynamics in elephant grass swards |
| title_short |
Levels of defoliation and regrowth dynamics in elephant grass swards |
| title_full |
Levels of defoliation and regrowth dynamics in elephant grass swards |
| title_fullStr |
Levels of defoliation and regrowth dynamics in elephant grass swards |
| title_full_unstemmed |
Levels of defoliation and regrowth dynamics in elephant grass swards |
| title_sort |
levels of defoliation and regrowth dynamics in elephant grass swards |
| description |
The morphogenetic and structural characteristics of forage plants and the processes of growth and senescence in tissues may vary according to the grazing management strategies used. This research aimed to assess the process of regrowth in elephant grass swards Cv. 'Pioneiro' submitted to two pre-grazing heights (90 and 120cm) combined with two levels of defoliation (50 and 70%). A reduction of the leaf elongation rate (LER) was observed during the regrowth stages, in addition to a reduction in the rate of leaf appearance (LAR) and aerial tiller population density (ATPD). In contrast, an increase was observed in leaf senescence (LSR) and stem and pseudo stem elongation rates (SER). The severe defoliation (70%) combined with a pre-grazing height of 120cm compromised the regrowth of elephant grass cv. 'Pioneiro', which must be managed with a maximum height of 90cm and maximum level of defoliation of 50% of the initial height. |
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Universidade Federal de Santa Maria |
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2015 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000701299 |
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