Difus?o da pr?tica de inocula??o alternativa para feij?o-caupi ? base de preparado de ra?zes finas noduladas com agricultores org?nicos da regi?o metropolitana do estado do Rio de Janeiro

• Ano de defesa: 2020
• Autor(a) principal: Santos, Sashia Cristina dos
• Orientador(a): Rumjanek, Norma Gouv?a
• Banca de defesa: Rumjanek, Norma Gouv?a, Martins, Lindete M?ria Vieira, Am?ncio, Cristhiane Oliveira da Gra?a
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal Rural do Rio de Janeiro
• Programa de Pós-Graduação: Programa de P?s-Gradua??o em Agricultura Org?nica
• Departamento: Instituto de Agronomia
• País: Brasil
• Palavras-chave em Português: fixa??o biol?gica de nitrog?nio; tecnologia social; agricultura org?nica
• Palavras-chave em Inglês: biological nitrogen fixation; organic agriculture; social technology
• Área do conhecimento CNPq: Agronomia
• Link de acesso: https://tede.ufrrj.br/jspui/handle/jspui/6345

The crisis generated by the agricultural model known as conventional brought to light a series of questions in society regarding the harmful effects on the environment. In such a scenario, the demand for alternative technologies that reduce environmental degradation and increase life quality in both rural and urban areas has increased, especially considering the long term maintenance of the productive capacity of soils. Biological nitrogen fixation (BNF) is a process in which a symbiosis between some plant species and diazotrophic bacteria fix nitrogen from the air, which has become a great ally to reduce the need for chemical fertilizers. The cowpea proved to be efficient in the use of BNF, however the commercial inoculant, despite being quite widespread in Brazil, has a restricted distribution, which limits its availability to family-based farmers. Alternative inoculation, using only local resources obtained from fine nodulated roots has been shown to be efficient and capable to increase cowpea grain yield to a similar level obtained by commercial inoculants. The objective of this study was to propose a participatory methodology with organic farmers affiliated to ABIO (Association of Biological Farmers of the State of Rio de Janeiro), in order to disseminate the practice of alternative inoculation for cowpea based on a suspension of fine nodulated roots, including Trichoderma as a biological control and as a plant growth promotion. Two field days were conducted in an organic production unit located in Cachoeiras de Macacu, metropolitan region of Rio de Janeiro, in November 2018 and February 2019. Twenty organic farmers from three neighboring municipalities participated. A structured questionnaire was applied on each field days, aiming initially to determine prior knowledge on topics related to the agricultural use of microorganisms and, at the end of the second day, the knowledge acquired during the activity. The most relevant factor for adoption of the alternative inoculation practice is the experience level concerning agricultural practices, which was independent of education degree or age. The simplicity and low cost of the technique prove to be a positive factor to favor the practice appropriation by farmers.