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Effect of weed interference periods in productivity of chickpea in response to topdressing of nitrogen fertilizer.

Grant number: 10/14018-0
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): March 01, 2011
Effective date (End): February 28, 2013
Field of knowledge:Agronomical Sciences - Agronomy - Crop Science
Principal Investigator:Pedro Luis da Costa Aguiar Alves
Grantee:Carita Liberato do Amaral
Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil


The interference caused by weeds is one of the factors that may cause the reduction in productivity of chickpeas (Cicer arietinum L.) due to its effects on growth and yield components of culture. Ecological studies of communities and knowledge of weed interference period become critical to the viability and effectiveness of the production chick-peas in Brazil, providing the development of programs for weed management. Thus, the purpose of this study is to determine the critical periods of weed interference in coexistence with the culture of chick-peas, in response to two doses of nitrogen mineral fertilizer topdressing (50 and 75 kg ha-1). For each dose the experimental systems used will be a randomized block with treatments consisted of increasing periods (0, 7, 14, 21, 28, 35, 42, 56, 63 and 84 days after sowing) of coexistence or weed control plants with chick-peas, in a factorial 2 x 10, totaling 20 treatments in four replications. In the weed community will be evaluated dry matter, the specific composition and phytosociological studies (Der, DoR, RF and IR). For the culture of chick-peas will be calculated grain yield, percentage loss in yield and critical periods of interference (PAI PTPI and CPIC).

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
AMARAL, CARITA LIBERATO; PAVAN, GUILHERME BACARIN; MASTROTTI PEREIRA, FERNANDA CAMPOS; DA COSTA AGUIAR ALVES, PEDRO LUIS. Periods of weed interference in chickpea grown under different doses of nitrogen fertilizer topdressing. Acta Scientiarum. Agronomy, v. 40, . (10/14018-0, 10/07809-1)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
AMARAL, Carita Liberato do. Interferência das plantas daninhas na cultura do grão-de-bico cultivado sob doses de adubação nitrogenada. 2013. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal Jaboticabal.

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