Engenharia Agrícola
URI permanente para esta coleçãohttps://thoth.dti.ufv.br/handle/123456789/10363
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Resultados da Pesquisa
Item Irrigation management in pruned coffee tree crop(Associação Brasileira de Engenharia Agrícola, 2013-01) Custódio, Anselmo A. de P.; Faria, Manoel A. de; Rezende, Fátima C.; Morais, Augusto R. de; Leite Junior, Maurício C. R.It was evaluated the effect of irrigation management on the production characteristics of coffee cultivar Acaiá MG-1474, planted in spacing of 3.00 m x 0.60 m, pruned in 2004, and irrigated by drip since the planting, in 1997. The experimental designed used was of randomized blocks with five treatments and four replications. The treatments consisted of irrigation management strategies, applying or not applying controlled moisture deficit in layer of 0 to 0.4m, in dry seasons of the year: A = no irrigation (control), B = irrigation during all year considering the factor of water availability in the soil (f) equal to 0.75, C = irrigation during all year considering f = 0.25, D = irrigation during all year, but in January / February / March / July / October / November / December with f = 0.25 and April / May / June / August / September with f = 0.75, E = irrigation only during April / May / June / August / September with f = 0.25. From July / 2005 to June / 2007 the applied water depth was defined based on Class A pan evaporation (ECA) and the period from July/2007 to June/2008 based on readings of matric potential of soil obtained from Watermark® sensors. Each plot consisted of three rows with ten plants per row, considering as useful plot five plants of center line. The results indicated that the E irrigation management was the most suitable for technical reasons.Item Energetic sustainability of three arabica coffee growing systems used by family farming units in espírito santo state(Associação Brasileira de Engenharia Agrícola, 2015-05) Muner, Lúcio H. de; Masera, Omar; Fornazier, Maurício J.; Souza, Cássio V. de; Loreto, Maria das D. S. deThree growing systems of Arabica coffee were evaluated under the energy perspective, in the state of Espírito Santo in Brazil. The systems are conventional cultivation (CC), cultivation with good agricultural practices (CGP) and organic farming (OF). It was made a comparison of the energy flows within these three systems to show sustainable levels of each one based on production average data of several family- farming units. Therefore, we analyzed crop yield, total energy efficiency reverse (TEER), energy efficiency of ripe coffee (EERC) and non- renewable energy efficiency (NREE). OF system had values for TEER, EERC and NREE of 3.3 4.7 and 7.9 respectively. Yet CC showed values of 1.8, 1.9 and 1.6 for TEER, EERC and NREE respectively. Furthermore, CGP presented values for TEER, EERC and NREE of 0.7, 1.3 and 1.4 respectively. The highest yield was observed in CGP, reaching an amount of 1794 kg ha-1 (17,455 MJ); however, this system expends more energy than it converts. Thus, over those points, OF is the most sustainable system.