Growth and Development of Purple Nutsedge Based on Days or Thermal Units
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Planta daninha (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200165 |
Resumo: | This work was carried out with the objective of elaborating mathematical models to predict growth and development of purple nutsedge (Cyperus rotundus) based on days or accumulated thermal units (growing degree days). Thus, two independent trials were developed, the first with a decreasing photoperiod (March to July) and the second with an increasing photoperiod (August to November). In each trial, ten assessments of plant growth and development were performed, quantifying total dry matter and the species phenology. After that, phenology was fit to first degree equations, considering individual trials or their grouping. In the same way, the total dry matter was fit to logistic-type models. In all regressions four temporal scales possibilities were assessed for the x axis: accumulated days or growing degree days (GDD) with base temperatures (Tb) of 10, 12 and 15 oC. For both photoperiod conditions, growth and development of purple nutsedge were adequately fit to prediction mathematical models based on accumulated thermal units, highlighting Tb = 12 oC. Considering GDD calculated with Tb = 12 oC, purple nutsedge phenology may be predicted by y = 0.113x, while species growth may be predicted by y = 37.678/(1+(x/509.353)-7.047). |
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Growth and Development of Purple Nutsedge Based on Days or Thermal UnitsCyperus rotundusgrowing degree daysphenologybase temperaturemodelingThis work was carried out with the objective of elaborating mathematical models to predict growth and development of purple nutsedge (Cyperus rotundus) based on days or accumulated thermal units (growing degree days). Thus, two independent trials were developed, the first with a decreasing photoperiod (March to July) and the second with an increasing photoperiod (August to November). In each trial, ten assessments of plant growth and development were performed, quantifying total dry matter and the species phenology. After that, phenology was fit to first degree equations, considering individual trials or their grouping. In the same way, the total dry matter was fit to logistic-type models. In all regressions four temporal scales possibilities were assessed for the x axis: accumulated days or growing degree days (GDD) with base temperatures (Tb) of 10, 12 and 15 oC. For both photoperiod conditions, growth and development of purple nutsedge were adequately fit to prediction mathematical models based on accumulated thermal units, highlighting Tb = 12 oC. Considering GDD calculated with Tb = 12 oC, purple nutsedge phenology may be predicted by y = 0.113x, while species growth may be predicted by y = 37.678/(1+(x/509.353)-7.047).Sociedade Brasileira da Ciência das Plantas Daninhas 2015-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200165Planta Daninha v.33 n.2 2015reponame:Planta daninha (Online)instname:Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD)instacron:SBCPD10.1590/0100-83582015000200001info:eu-repo/semantics/openAccessLima,R.S.O.Machado,E.C.R.Silva,A.P.P.Marques,B.S.Gonçalves,M.F.Carvalho,S.J.P.eng2015-07-06T00:00:00Zoai:scielo:S0100-83582015000200165Revistahttp://revistas.cpd.ufv.br/pdaninhaweb/https://old.scielo.br/oai/scielo-oai.php||rpdaninha@gmail.com1806-96810100-8358opendoar:2015-07-06T00:00Planta daninha (Online) - Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD)false |
dc.title.none.fl_str_mv |
Growth and Development of Purple Nutsedge Based on Days or Thermal Units |
title |
Growth and Development of Purple Nutsedge Based on Days or Thermal Units |
spellingShingle |
Growth and Development of Purple Nutsedge Based on Days or Thermal Units Lima,R.S.O. Cyperus rotundus growing degree days phenology base temperature modeling |
title_short |
Growth and Development of Purple Nutsedge Based on Days or Thermal Units |
title_full |
Growth and Development of Purple Nutsedge Based on Days or Thermal Units |
title_fullStr |
Growth and Development of Purple Nutsedge Based on Days or Thermal Units |
title_full_unstemmed |
Growth and Development of Purple Nutsedge Based on Days or Thermal Units |
title_sort |
Growth and Development of Purple Nutsedge Based on Days or Thermal Units |
author |
Lima,R.S.O. |
author_facet |
Lima,R.S.O. Machado,E.C.R. Silva,A.P.P. Marques,B.S. Gonçalves,M.F. Carvalho,S.J.P. |
author_role |
author |
author2 |
Machado,E.C.R. Silva,A.P.P. Marques,B.S. Gonçalves,M.F. Carvalho,S.J.P. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Lima,R.S.O. Machado,E.C.R. Silva,A.P.P. Marques,B.S. Gonçalves,M.F. Carvalho,S.J.P. |
dc.subject.por.fl_str_mv |
Cyperus rotundus growing degree days phenology base temperature modeling |
topic |
Cyperus rotundus growing degree days phenology base temperature modeling |
description |
This work was carried out with the objective of elaborating mathematical models to predict growth and development of purple nutsedge (Cyperus rotundus) based on days or accumulated thermal units (growing degree days). Thus, two independent trials were developed, the first with a decreasing photoperiod (March to July) and the second with an increasing photoperiod (August to November). In each trial, ten assessments of plant growth and development were performed, quantifying total dry matter and the species phenology. After that, phenology was fit to first degree equations, considering individual trials or their grouping. In the same way, the total dry matter was fit to logistic-type models. In all regressions four temporal scales possibilities were assessed for the x axis: accumulated days or growing degree days (GDD) with base temperatures (Tb) of 10, 12 and 15 oC. For both photoperiod conditions, growth and development of purple nutsedge were adequately fit to prediction mathematical models based on accumulated thermal units, highlighting Tb = 12 oC. Considering GDD calculated with Tb = 12 oC, purple nutsedge phenology may be predicted by y = 0.113x, while species growth may be predicted by y = 37.678/(1+(x/509.353)-7.047). |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200165 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200165 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0100-83582015000200001 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira da Ciência das Plantas Daninhas |
publisher.none.fl_str_mv |
Sociedade Brasileira da Ciência das Plantas Daninhas |
dc.source.none.fl_str_mv |
Planta Daninha v.33 n.2 2015 reponame:Planta daninha (Online) instname:Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD) instacron:SBCPD |
instname_str |
Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD) |
instacron_str |
SBCPD |
institution |
SBCPD |
reponame_str |
Planta daninha (Online) |
collection |
Planta daninha (Online) |
repository.name.fl_str_mv |
Planta daninha (Online) - Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD) |
repository.mail.fl_str_mv |
||rpdaninha@gmail.com |
_version_ |
1752126494456414208 |