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| Dalri,Alexandre Barcellos; Garcia,Carlos Jesus Baca; Zanini,José Renato; Faria,Rogério Teixeira de; Palaretti,Luiz Fabiano. |
| Este trabalho teve por objetivo caracterizar e avaliar o desempenho de quatro modelos de gotejadores autocompensantes, frequentemente utilizados nos sistemas de irrigação por gotejamento no Brasil. Para realização do estudo, foi tomada uma amostra de 25 gotejadores de cada modelo. Na avaliação dos respectivos tubos emissores, foram determinados os seguintes parâmetros: (a) vazão média, (b) coeficiente de variação de fabricação, (c) espessura da parede (d), equação característica do gotejador, (e) diâmetro interno do tubo, (f) espaçamento entre emissores, (g) resistência à pressão com água na temperatura ambiente e à temperatura de 40oC, e (h) resistência do tubo à tração com tensão de 160 N e 180 N. As análises mostraram coeficientes de variação de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avaliação; Emissor; Irrigação por gotejamento.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000801439 |
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| Viana,Jonathan dos S; Palaretti,Luiz Fabiano; Sousa,Vinicius M de; Barbosa,José de A; Bertino,Antonio Michael P; Faria,Rogério T de; Dalri,Alexandre B. |
| ABSTRACT Collard is a vegetable widely consumed in Brazil. However, the quality and production of this vegetable depend on the supply and quality of water. Water stress and saline stress can make it impossible to grow. The objective of this study was to evaluate the performance of morphophysiological characteristics of collard cv. Georgia under irrigation levels and saline indices after the first defoliation.The experiment was conducted in a greenhouse, under random blocks design, and the treatments consisted of combinations of five water electrical conductivities (CEi in dS m-1: C1 =0.80; C2 =1.30; C3 = 1.80; C4 = 2.30; C5 = 2.80) and four irrigation levels based on the vase capacity (PwC: L1 = 55%; L2 = 70%; L3 = 85%; L4 = 100%), with four replications.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica oleracea var. acephala; Leafy vegetable; Brackish water; Irrigation management. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362021000100079 |
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| Viana,Jonathan dos S; Palaretti,Luiz Fabiano; Faria,Rogério T de; Delgado,Yago V; Dalri,Alexandre B; Barbosa,José de A. |
| ABSTRACT Increasing potato yield while saving natural resources is a challenge for all those involved in the potato production chain. A field experiment was carried out in order to evaluate the effect of different levels of fertilization, mass of seed tubers and the water regime on the production of potato cv. Orchestra. We tested fertilization methods (F1= conventional fertilization; F2= fertigation according to the rate of absorption by the crop; F3= fertigation split into 3 applications), seed tuber mass (ST1= <50 g; ST2= >50 g), and water regimes [WR1= 50%; WR2= 100% replacement of crop evapotranspiration (ETc)]. The study was conducted using a split-plot randomized block design, with fertilizers in the plot and seed tuber mass in the subplot,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum; Drip irrigation; Nutrition; Propagation. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000200166 |
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| Silva,Paulo Henrique Soares; Palaretti,Luiz Fabiano; Cecílio Filho,Arthur Bernardes; Silva,Yane Freitas da. |
| ABSTRACT In vegetables, especially the leafy ones, nitrogen (N) and water are essential in its growth, being N the second most absorbed and identified nutrient in the arugula leaf tissue. Water is essential for horticultural crops, so its use must be rational in order to achieve high yield. The objective of this study was to evaluate the effect of nitrogen levels and irrigation depths on the productive characteristics, the total leaf chlorophyll index (ICF) and nitrogen contents in the arugula culture. The experiment was arranged in a randomized block design subdivided in plots, with two factors: A) nitrogen levels applied in coverage (25, 50, 100, 125 and 150 mg dm-3) and B) irrigation depths [(50 and 100% of the available water capacity (AWC)]. At... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eruca sativa; Leaf chlorophyll index; Leafy vegetables; Water complementation; Plant growth. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000400343 |
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