Porto Alegre, Brazil
Porto Alegre, Brazil
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Martin C.A.S.,Doutoranda em Producao Vegetal | dos Reis E.F.,CCAUFES | Passos R.R.,CCAUFES | Garcia G.O.,CCAUFES
Idesia | Year: 2011

In irrigated agriculture inadequate uniformity of water application in irrigation systems provides an excess of one part of the acreage and a deficit in another, reducing the availability of water to corn and increasing the cost of production. The objective of this study was to evaluate in the field the performance of systems for conventional sprinkler irrigation in the south of the state of Espírito Santo. Five irrigation projects with conventional sprinkler irrigation were chosen randomly. Each project was tested for uniformity of application of water by determining several coefficients of uniformity (Coefficient of Uniformity of Christiansen, Coefficient of Statistical Uniformity and Coefficient of Uniformity of Distribution), and for the efficiency of application of water. The results show that 60% of the irrigation projects with conventional sprinkler irrigation evaluated presented low uniformity of application of water; that the depth of water applied in the appraised period is superior to the required depth for the plant; and that the average of the application efficiency in the projects was 71.88%, below the 75% recommended in the literature as the acceptable minimum.

Moraes W.B.,CCAUFES | Filho S.M.,DPI UFV | Garcia G.O.,CCAUFES | Caetano S.P.,CCAUFES | Cosmi F.C.,CCAUFES
Idesia | Year: 2010

Several factors as the temperature, soil acidity, content of nutrients and cultivate interfere in the symbiotic efficiency of the ancestries of Rhizobium in field conditions. With the objective of evaluating the capacity of biological fixation of nitrogen of native ancestries of Rhizobium sp. an experiment was accomplished in vases set up in the delineate entirely casualty in the factorial outline 10x7 (10 bean plant lineages considered tolerant to the water deficit, being these: Amarelinho, Macuquinho, Imperial, EL 22, BATT 477, Uirapuru, IAPAR-81, Bate Estrada, Serrano and Preto Meia Lua and 7 isolated inoculate of the soils of the municipal districts of Colatina, Vila Pavão, Nova Venécia, Pinheiros, Sooretama, Linhares and Alegre in Espírito Saint state, with four repetitions. The data demonstrated that the biological fixation of N2 using the inoculation of efficient ancestries of Rhizobium in cultivating bean plant nodule cultivation in soils with efficient native population, it can make possible the supplement or even to the not use of nitrogen in covering in the culture bean plant, without losses in the income of the productivity.

Moraes W.B.,CCAUFES | Filho S.M.,DPI UFV | de Oliveira Garcia G.,CCAUFES | de Paiva Caetano S.,CCAUFES
Idesia | Year: 2010

The present work had as objective evaluates bean plant genotypes with the purpose of selecting materials with capacity of tolerance the drought. The experiment was driven inside of greenhouse in the campus of the Center of Agrarian Sciences of Espírito Saint Federal University (CCAUFES), Alegre-ES. Due to the great number of genotypes to they be appraised the experiment was accomplished in two stages, the used delineate was it entirely casualty in the outline of subdivided portions, being the humidity of the soil in the period of water déficit in interval of two days, for method EDABO (Direct Evaporation of Water in Bath of Oil). In productivity terms it was possible to verify the no-significant difference among the cultivation systems without and with stress for the genotypes IN 2, IN 9, IN 12, IN 14, IN 16, IN 17, IN 18, EL-22, IAPAR 81, Red and Earring of Gold, showing, this way, that these genotypes are tolerant to water deficit; however these materials, in most, were little productive. For the number of flowers, characteristic this that carts smaller number of husk and consequently smaller productivity, the genotypes Caeté pé curto, Iconha, Vagem riscada and Macuquinho, came susceptible to the water deficit. For the other genotypes there was not significant difference among the cultivation systems, showing that these genotypes, for this characteristic, behaved in a similar way, in the presence and in the absence of the water déficit.

Garcia G.O.,CCAUFES | Nazario A.A.,CCAUFES | Goncalves I.Z.,CCAUFES | Madalao J.C.,CCAUFES | do Amaral J.A.T.,CCAUFES
IRRIGA | Year: 2012

In order to evaluate nutrition of seedlings conilon coffee under irrigation with saline water an experiment was conducted in a greenhouse, in a completely randomized design with five treatments consisted of irrigation with fresh water and irrigation with four concentrations of saline water: 1.0, 2.0, 3.0 and 4.0 dS m -1, with four replications. To evaluate the effects of salinity on coffee tree's a nutrition analysis was performed by determining the nutritional content in leaves and roots of N, P, K, Ca, Mg, S and Na, at 125 days after planting. The results obtained showed that irrigation with saline water increased the levels of Na in leaves and roots; resulting in higher levels of N, Ca and Na in the leaves, and of K, Mg and S in the roots; the concentration of P did not differ.

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