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Thebaldi M.S.,Federal University of Lavras | da Rocha M.S.,Instituto Brasilia Ambiental | Sandri D.,University of Brasilia | Felisberto A.B.,State University of Goiás
IRRIGA | Year: 2013

This paper aim was to study the postharvest conservation on the environment condition of the tomato cv. Dominator irrigated by surface and subsurface drip with different water qualities. The experiment was carried out in Anápolis, GO, Brazil, between July to October 2009, with randomized block design, combining the following treatments: A1 -cattle slaughter wastewater, A2 -conventional fertirrigation and A3 - natural water stream and drip type: I1 -surface and I2 - subsurface, with four replications. The fruits were kept for 21 days in average temperature of 27 ° C and relative humidity of 60%. At the beginning of storage (day zero) In all treatments increased pH and soluble solids and reduction of acidity, while the total sugar showed no regularity between the different days and treatments. From the seventh day of storage the weight loss was seen above the acceptable commercially, with the highest losses occurred in dealing with surface drip irrigation and conventional fertirrigation.


Thebaldi M.S.,Federal University of Lavras | Da Rocha M.S.,University of Brasilia | Sandri D.,Instituto Brasilia Ambiental | Felisberto A.B.,State University of Goiás | Avelino Neto S.,State University of Goiás
IRRIGA | Year: 2013

Despite of showing some susceptibility to clogging the drip irrigation system is the most suitable for the application of treated effluents, because there is no risk of fruit and leaves contamination and has reduced possibility of farmer or consumer contamination as well as water and energy savings,. This research aimed to evaluate water application uniformity using surface and subsurface drip irrigation with treated wastewater from cattle slaughter, conventional fertigation and natural water from a stream before and after one fresh tomato crop cycle. On the 90th day of the crop cycle emitter flows were evaluated in three lines of each combination of water and drip type on a total of 12 drip emitters per lateral line. Values of CUC, CUD and CUE for each treatment were computed from the flow measurements. Higher reduction of the CUC, CUD and CUE values were found for wastewater irrigation and subsurface drip irrigation. Once the tomato cycle was over, the CUC was rated excellent, the CUD good and the CUE excellent for most treatments.


Thebaldi M.S.,Federal University of Lavras | da Rocha M.S.,Instituto Brasilia Ambiental | Sandri D.,University of Brasilia | Felisberto A.B.,State University of Goiás
IRRIGA | Year: 2013

This study aimed to evaluate the productivity and the development of tomato (Lycopersicon esculentum Mill.) cv. Dominator, irrigated with cattle slaughter treated wastewater, conventional fertirrigation and water from a stream, applied by surface and subsurface drip irrigation. The experiment was conducted from July to October, 2009, in the Wastewater Treatment Plant of a slaughter-house at Anápolis, State of Goiás, Brazil. Was used randomized block experimental design in a factorial 3 × 2, with 4 replications. The treatments combination consisted in irrigation waters (A1: cattle slaughter treated wastewater, A2: conventional fertirrigation and A3: stream water - control) and in irrigation system type (I1: surface drip irrigation and I2: subsurface drip irrigation). It was evaluated the plants height, fruits weight and productivity. Neither water quality nor irrigation systems had influence on both plant growth and fruit average weight. In the subsurface drip irrigation system the productivity was better with cattle slaughter treated wastewater (53.12 t ha-1) than in treatments using the Stream water (39.24 t ha-1) and conventional fertirrigation (41.54 t ha-1).


Thebaldi M.S.,Federal University of Lavras | Sandri D.,University of Brasilia | Felisberto A.B.,Instituto Brasilia Ambiental | Da Rocha M.S.,Instituto Brasilia Ambiental | Neto S.A.,State University of Goiás
Engenharia Agricola | Year: 2013

Quality of irrigation water is very important to conserve products quality and the operation of irrigation equipment, especially when it contains effluent from residuary sources. The aim of this study was to evaluate the release of treated effluent from cattle slaughter on irrigation water quality of the Jurubatuba Stream, Anápolis - GO, Brazil. The effluent and water samples were taken on six different days and at the following locations: at the discharge of treated effluent before released into the stream - P1, 50 m upstream from the discharge point - P2, 50 m downstream from the discharge point - P3 and 120 m downstream from the discharge point - P4. Variables analyzed were dissolved solids, pH, iron, water hardness, sodium, calcium, magnesium, manganese, SAR, boron and BOD. Medium or high risk of emitters clogging were noticed by possible use of effluent for trickle irrigation when considering variables such as pH, dissolved solids, Iron, Manganese and water hardness. Water at analyzed points in the Jurubatuba Stream presented medium risk of clogging and moderate restriction of use in relation to water infiltration problems. At all analyzed points, the BOD concentrations were higher than the limit for irrigation of vegetables consumed fresh or cooked.

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