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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Vantagens agroeconômica do consórcio de cenoura e caupi-hortaliça sob arranjos espaciais e densidades populacionais / Agro-economic benefits of carrot and cowpea-vegetables in intercropping under spatial arrangements and population densities

Ribeiro, Giorgio Mendes 29 December 2015 (has links)
Submitted by Lara Oliveira (lara@ufersa.edu.br) on 2017-01-10T15:42:23Z No. of bitstreams: 1 GiorgioMR_TESE.pdf: 2083623 bytes, checksum: c062c480814fefe06ef42cec2f593a9c (MD5) / Approved for entry into archive by Vanessa Christiane (referencia@ufersa.edu.br) on 2017-01-24T14:45:55Z (GMT) No. of bitstreams: 1 GiorgioMR_TESE.pdf: 2083623 bytes, checksum: c062c480814fefe06ef42cec2f593a9c (MD5) / Made available in DSpace on 2017-03-21T14:55:34Z (GMT). No. of bitstreams: 1 GiorgioMR_TESE.pdf: 2083623 bytes, checksum: c062c480814fefe06ef42cec2f593a9c (MD5) Previous issue date: 2015-12-29 / Outra / This work was carried out from July 2013 to February 2014 at the Experimental Farm Rafael Fernandes, of the Federal Rural University of the Semi-Arid, Mossoró-RN, in order to determine the agro-economic advantages of carrot and cowpea-vegetable in intercropping under different spatial arrangements and population densities. The experimental design was a randomized complete block with four replications, with the treatments arranged in a 3 x 4 factorial scheme. The first factor was composed of spatial arrangements (2: 2, 3: 3 and 4: 4) and the second factor by the population densities of cowpea-vegetables (100%, 80%, 60% and 40% of the recommended population in sole crop - RPSC). Green manure was made with the incorporation of 51 t ha-1 on a dry basis of roostertree in pre-planting and at 60 days after planting. The characteristics evaluated for carrot were: plant height, total and commercial productivity of roots, fresh mass of shoot, dry mass of roots and classified productivity of roots. For the cowpea-vegetables were evaluated the following characteristics: number of green pods, pod length, yield of green pods, number of green grains per pod, weight of 100-green grains and productivity of green grains. The indices of competition and agro-economic efficiency of intercropping systems assessed were: Aggressivity, competition rate, loss of actual yield, intercropping advantage, land equivalent ratio, productive efficiency index and score of the canonical variable. It was also evaluated the following economic indicators: gross income, net income, rate of return and profit margin. The agro-economic efficiency of carrot and cowpea-vegetable in intercropping system was influenced by the spatial arrangements, with the arrangement 2: 2 standing out from the others. The highest agro-economic efficiency of carrot and cowpea-vegetable in intercropping system was obtained in population density of 90% for cowpea-vegetable in sole crop when the score of the canonical variable had a value of 1.16 and the productive efficiency index of 0.75 / O presente trabalho foi realizado no período de julho de 2013 a fevereiro de 2014 na Fazenda Experimental Rafael Fernandes, da Universidade Federal Rural do Semi-Árido, Mossoró-RN, com o objetivo determinar as vantagens agroeconômica do consórcio cenoura e caupi-hortaliça sob diferentes arranjos espaciais e densidades populacionais. O delineamento experimental utilizado foi de blocos completo casualizados com 4 repetições, com os tratamentos arranjados em esquema fatorial 3x4. O primeiro fator foi constituído pelos arranjos espaciais (2:2; 3:3 e 4:4) e o segundo fator pelas densidades populacionais de caupi-hortaliça (100%, 80%, 60% e 40% da população recomendada no cultivo solteiro). A adubação verde foi feita com a incorporação de 51 t ha-1 em base seca de flor-de-seda no pré-plantio e 60 dias após o plantio. As características avaliadas para a cenoura foram: altura de plantas, produtividade total e comercial de raízes, massa fresca da parte aérea, massa seca de raízes e produtividade classificada de raízes. Para o caupi-hortaliça foram avaliadas as seguintes características: número de vagens verdes, comprimento das vagens, produtividade de vagens verdes, número de grãos verdes por vagem, peso de 100 grãos verdes e produtividade de grãos verdes. Os índices de competição e de eficiência agroeconômica dos sistemas consorciados avaliados foram: índice de superação, taxa de competição, perda de rendimento real, vantagem do consórcio, índice de uso eficiente da terra, índice de eficiência produtiva e escore da variável canônica. Foram avaliados os seguintes indicadores econômicos: renda bruta, renda líquida, taxa de retorno e índice de lucratividade. A eficiência agroeconômica do sistema consorciado de cenoura com caupi-hortaliça foi influenciada pelos arranjos espaciais, com o arranjo 2:2 sobressaindo-se dos demais. A maior eficiência agroeconômica do sistema consorciado de cenoura com caupi-hortaliça foi obtida na densidade populacional de 90% da PRCS quando o escore da variável canônica foi otimizado no valor de 1,16 e o índice de eficiência produtiva foi de 0,75 / 2017-01-10

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