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Impact of the timing and duration of weed control on the establishment of a rubber tree plantation.
Guzzo, Caio D; Carvalho, Leonardo B de; Giancotti, Paulo R F; Alves, Pedro L C A; Gonçalves, Elaine C P; Martins, José V F.
Afiliação
  • Guzzo CD; Departamento de Biologia Aplicada a Agropecuaria, Universidade Estadual Paulista, Jaboticabal, SP, Brasil.
  • Carvalho LB; Departamento de Agronomia, Universidade do Estado de Santa Catarina, Lages, SP, Brasil.
  • Giancotti PR; Departamento de Biologia Aplicada a Agropecuaria, Universidade Estadual Paulista, Jaboticabal, SP, Brasil.
  • Alves PL; Departamento de Biologia Aplicada a Agropecuaria, Universidade Estadual Paulista, Jaboticabal, SP, Brasil.
  • Gonçalves EC; Departamento de Descentralizacao do Desenvolvimento, Agencia Paulista de Tecnologia dos Agronegocios, Colina, SP, Brasil.
  • Martins JV; Departamento de Biologia Aplicada a Agropecuaria, Universidade Estadual Paulista, Jaboticabal, SP, Brasil.
An Acad Bras Cienc ; 86(1): 495-504, 2014 Mar.
Article em En | MEDLINE | ID: mdl-24519007
Rubber tree production is reduced by weeds that compete for environmental resources; therefore, the timing and duration of weed control influences weed interference. The objectives of this study were to evaluate the growth of rubber tree (Hevea brasiliensis) plants, to determine the critical period for weed control, and to evaluate the growth recovery of rubber trees that coexisted with weeds for different periods of time after planting. Two groups of treatments were established under field conditions in the first year of the investigation: one group contained crescent periods of weed infestation, while the other contained crescent periods of weed control, also including a weed-free check and a total weedy check. In the second year of the investigation, the weeds were totally controlled. Urochloa decumbens was the dominant weed (over 90% groundcover). Crop growth was greatly reduced due to the weed interference. Plant height decreased more rapidly than did any other characteristic. Plant height, leaf dry mass, and leaf area decreased by 99%, 97% and 96%, respectively, and were the most reduced characteristics. Plant height also recovered more rapidly than did any characteristic when the period of weed control was lengthened. However, stem dry mass increased by 750%, making it the most recovered characteristic. The critical period for weed control was between 4 and 9½ months after planting in the first year; however, the rubber trees showed an expressive growth recovery when the weeds were controlled throughout the second year.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Hevea / Controle de Plantas Daninhas País/Região como assunto: America do sul / Brasil Idioma: En Revista: An Acad Bras Cienc Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Hevea / Controle de Plantas Daninhas País/Região como assunto: America do sul / Brasil Idioma: En Revista: An Acad Bras Cienc Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil