|
|
|
|
| |
|
|
| Santos,Marcelo R. dos; Martinez,Mauro A.; Donato,Sérgio L. R.; Coelho,Eugênio F.. |
| The aim of this study was to evaluate the 'Tommy Atkins' mango yield and photosynthesis in regulated deficit irrigation (RDI) in semiarid conditions of Bahia, Brazil. The experimental design was a randomized block with five treatments and six replications: T1, irrigation supplying 100% crop evapotranspiration (ETc) in phases: I (beginning of flowering to early fruit growth), II (start of expansion until early physiological maturity) and phase III (physiologically mature fruits); T2, RDI with 50% ETc in phase I; T3, RDI with 50% ETc in phase II; T4, RDI with 50% ETc in phase III; T5, No irrigation. The soil water deficit causes a reduction in photosynthesis. Mango yield in treatment 4 was approximately 5.5 and 2 times greater than in treatments 5 and 2,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mangifera; Water use efficiency; Regulated deficit irrigation; Partial root zone drying. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014000900004 |
| |
|
|
| Brito,Cleiton F. B.; Santos,Marcelo R. dos; Fonseca,Varley A.; Arantes,Alessandro de M.; Almeida,Jean R. de. |
| ABSTRACT The objective of this study was to evaluate the physiological characteristics and yield of ‘Pérola’ pineapple subjected to irrigation with saline water in the semi-arid region of Bahia. The experiment was conducted in randomized blocks with five treatments, represented by irrigation depths: 100% ETc, using water with electrical conductivity (ECw) of 0.75 dS m-1, and 50, 75, 100 and 125% ETc, using water with ECw of 3.6 dS m-1. The experiment used a drip irrigation system and pressure-compensating emitters with a discharge of 8 L h-1. In the physiographic conditions of Guanambi-BA, pineapple has limitations of the physiological characteristics of chlorophyll fluorescence and chlorophyll index, under irrigation with both saline water and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salinity; CAM plants; Irrigation management. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001200834 |
| |
|
| |
|
|
| Santos,Marcelo R. dos; Donato,Sérgio L. R.; Lourenço,Lilian L.; Silva,Tânia S.; Coelho Filho,Mauricio A.. |
| ABSTRACT This study aimed to analyze different irrigation strategies in two cultivars of the banana crop. The study was conducted in four production cycles of ‘Prata-Anã’ and ‘BRS Platina’ bananas. The applied irrigation depths (ID) were obtained by the model ID = K x LA x ETo, where K is an empirical transpiration constant of 0.20; 0.35; 0.50 and 0.65 for the strategies 1, 2, 3 and 4, respectively; LA is the leaf area of mother and daughter plants of ‘Prata-Anã’ and ETo is the reference evapotranspiration. The strategy 5 was obtained according to the crop evapotranspiration, ETc = ETo x Kc, where Kc is the crop coefficient. Drip irrigation system was used, with two laterals per plant row and emitters with flow rate of 8 L h-1, spaced at 0.50 m. It was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Musa spp.; Crop evapotranspiration; Leaf area. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000900817 |
| |
|
|
| Zonta,João H.; Martinez,Mauro A.; Silva,Demetrius D. da; Pruski,Fernando F.; Santos,Marcelo R. dos. |
| RESUMO Este trabalho objetivou avaliar o desempenho do modelo de Green-Ampt-Mein-Larson (GAML) na simulação do processo de infiltração em solos com encrostamento superficial. Os ensaios de infiltração foram realizados num Cambissolo com a utilização de simulador de chuvas, em solo nu. O valor da condutividade hidráulica na zona de transmissão (Kt) foi considerado igual a Kt* que, por sua vez, é igual à taxa de infiltração estável (Tie) multiplicada pelo fator f, que representa o decaimento da Tie em função da energia cinética acumulada da chuva (Ec), ou seja, o valor de Kt variando ao longo do tempo. O modelo GAML com o valor de Kt constante ao longo do tempo não obteve bom desempenho superestimando, na maioria dos casos, os valores da taxa de infiltração... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: GAML; Parâmetros; Energia cinética da chuva. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012000500002 |
| |
|
| |
|
|
|
