| dc.contributor.author |
Varlagas, H |
en |
| dc.contributor.author |
Savvas, D |
en |
| dc.contributor.author |
Mouzakis, G |
en |
| dc.contributor.author |
Liotsos, C |
en |
| dc.contributor.author |
Karapanos, I |
en |
| dc.contributor.author |
Sigrimis, N |
en |
| dc.date.accessioned |
2014-06-06T06:50:35Z |
|
| dc.date.available |
2014-06-06T06:50:35Z |
|
| dc.date.issued |
2010 |
en |
| dc.identifier.issn |
03783774 |
en |
| dc.identifier.uri |
http://dx.doi.org/10.1016/j.agwat.2010.03.004 |
en |
| dc.identifier.uri |
http://62.217.125.90/xmlui/handle/123456789/5075 |
|
| dc.subject |
Closed hydroponics |
en |
| dc.subject |
Lycopersicon esculentum |
en |
| dc.subject |
Nutrient solution |
en |
| dc.subject |
Salinity |
en |
| dc.subject |
Soilless culture |
en |
| dc.subject.other |
Closed cycle |
en |
| dc.subject.other |
Closed hydroponic systems |
en |
| dc.subject.other |
Concentration of |
en |
| dc.subject.other |
Concentration ranges |
en |
| dc.subject.other |
Drainage solutions |
en |
| dc.subject.other |
Drainage water |
en |
| dc.subject.other |
Empirical model |
en |
| dc.subject.other |
Hydroponic systems |
en |
| dc.subject.other |
Irrigation waters |
en |
| dc.subject.other |
Low concentrations |
en |
| dc.subject.other |
Lycopersicon esculentum |
en |
| dc.subject.other |
NaCl concentration |
en |
| dc.subject.other |
Nutrient solution |
en |
| dc.subject.other |
Nutrient supply |
en |
| dc.subject.other |
Root zone |
en |
| dc.subject.other |
Soil-less culture |
en |
| dc.subject.other |
Tomato crops |
en |
| dc.subject.other |
Tomato genotypes |
en |
| dc.subject.other |
Tomato hybrid |
en |
| dc.subject.other |
Artificial intelligence |
en |
| dc.subject.other |
Computer simulation |
en |
| dc.subject.other |
Crops |
en |
| dc.subject.other |
Cultivation |
en |
| dc.subject.other |
Decision support systems |
en |
| dc.subject.other |
Decision theory |
en |
| dc.subject.other |
Experiments |
en |
| dc.subject.other |
Fruits |
en |
| dc.subject.other |
Irrigation |
en |
| dc.subject.other |
Nutrients |
en |
| dc.subject.other |
Optimization |
en |
| dc.subject.other |
Plants (botany) |
en |
| dc.subject.other |
Salinity measurement |
en |
| dc.subject.other |
Sodium chloride |
en |
| dc.subject.other |
Wastewater disposal |
en |
| dc.subject.other |
Water supply |
en |
| dc.subject.other |
Concentration (process) |
en |
| dc.subject.other |
calibration |
en |
| dc.subject.other |
cation |
en |
| dc.subject.other |
crop production |
en |
| dc.subject.other |
cultivation |
en |
| dc.subject.other |
decision support system |
en |
| dc.subject.other |
drainage water |
en |
| dc.subject.other |
empirical analysis |
en |
| dc.subject.other |
experimental study |
en |
| dc.subject.other |
fruit |
en |
| dc.subject.other |
genotype |
en |
| dc.subject.other |
hydroponics |
en |
| dc.subject.other |
irrigation system |
en |
| dc.subject.other |
nutrient uptake |
en |
| dc.subject.other |
optimization |
en |
| dc.subject.other |
rhizosphere |
en |
| dc.subject.other |
salinity |
en |
| dc.subject.other |
simulation |
en |
| dc.subject.other |
sodium chloride |
en |
| dc.subject.other |
water quality |
en |
| dc.subject.other |
Lycopersicon esculentum |
en |
| dc.title |
Modelling uptake of Na+ and Cl- by tomato in closed-cycle cultivation systems as influenced by irrigation water salinity |
en |
| heal.type |
journalArticle |
en |
| heal.identifier.primary |
10.1016/j.agwat.2010.03.004 |
en |
| heal.publicationDate |
2010 |
en |
| heal.abstract |
The aim of the present investigation was to simulate the uptake concentrations (weights of ion per volume of water absorbed) of Na+ and Cl- in hydroponic tomato crops as a function of the NaCl concentration in the root zone. An empirical model was calibrated and validated, which can be incorporated into on-line operating decision support systems aimed at optimizing the nutrient supply and minimizing the discharge of drainage solution in tomato crops grown in closed-cycle hydroponic systems. Three experiments were conducted, of which one was carried out to calibrate the model using irrigation water with NaCl concentration ranging from 0 to 14.7 mol m-3 while the other two experiments were commissioned to validate the model within either a low (0.5-2 mol m-3) or a high (1.2-12 mol m-3) concentration range. The model could successfully predict the uptake concentration of Na+, but Cl- could not be simulated by this model at external Cl- concentrations lower than 10 mol m-3. The results indicate that Na+ is excluded actively and effectively by the tested tomato cultivar even at low external Na+ concentrations, while Cl- is readily taken up at low concentrations, particularly during the initial growing stages. Due to the efficient exclusion of Na+ by tomato, the Na+ concentration in the root environment increased rapidly to extremely high levels even when the Na+ concentration in the irrigation water was relatively low. These results indicate that tomato genotypes characterized by high salt-exclusion efficiency, require irrigation water with a very low NaCl concentration, if they are grown in closed hydroponic systems and the drainage water is not flushed periodically. To maintain Na+ at levels lower than 19 mol m-3 in the root zone of the tomato hybrid 'Formula' in closed hydroponics, a maximum acceptable Na+ concentration of 0.53 mol m-3 was estimated for the irrigation water. © 2010 Elsevier B.V. All rights reserved. |
en |
| heal.journalName |
Agricultural Water Management |
en |
| dc.identifier.issue |
9 |
en |
| dc.identifier.volume |
97 |
en |
| dc.identifier.doi |
10.1016/j.agwat.2010.03.004 |
en |
| dc.identifier.spage |
1242 |
en |
| dc.identifier.epage |
1250 |
en |