Abstract BACKGROUND: Iodine is an essential trace element for humans. Two billion individuals have insufficient iodine intake. Biofortification of vegetables with offers excellent opportunity to increase intake by The main aim was study the effect form and concentration in nutrient solution on growth, development uptake lettuce, grown water culture. RESULTS: In both a winter summer trial, dose rates 0, 13, 39, 65, 90 or 129 µg L −1 , applied as iodate (IO 3 − ) iodide (I ), did not affect...

Production of vegetables for fresh consumption in arid regions usually takes place greenhouses with evaporative cooling during the warm months year. In this period, water use easily exceeds irrigation use. The purpose paper is to investigate how far can be lowered by adapting design elements greenhouse and system. a trial desert environment, Riyadh (KSA), two different greenhouses: one traditional modified, both equipped pad fan system, have been compared terms productivity main focus on...

In large parts of the Netherlands surface water quality does not meet chemical and ecological standards as indicated by EU Water Framework Directive (WFD). The largest exceedances were found in areas with greenhouse horticulture, flower bulbs, fruit trees ornamental trees. Several regulations have been implemented to improve areas, leading finally a target for zero emission nutrients 2027 soilless cultivation rules minimise losses soil bound cultivation. addition that an obligation exists...

Fertigation in combination with drip irrigation is being increasingly used vegetable crop production.From a nutrient management perspective, this provides the technical capacity for precise nitrogen (N) nutrition, both spatially and temporally.With these systems, N other nutrients can be spoon-fed to crops, through frequent applications of small amounts, immediate root zone as required by crop.In commercial farming practice, combined drip/fertigation systems generally does not take advantage...

Organic greenhouse production within the European context is limited both by its own principles, among them restrictions concerning soil and fertilizers, legislative on manure, compost fertilizer applications. Results of a monitoring project organic greenhouses were evaluated various legal constraints. Important bottle necks are related to limitations in N P input, unbalanced input nutrients irrigation with consequently increased salinity problems. The development an database decision...

Soil fertility management systems in organic greenhouses are quite diversified within Europe. The challenge is to identify and implement strategies which agreement with the principles stated by (EC) Reg. 834/2007 889/2008 as well environmentally, socially economically sustainable. In this paper, written a group of scientists different geographical origin background, state art sector main characteristics European greenhouse cropping described. bottlenecks constraints discussed particular...

Much focus has been placed on the impact of exposure to perchlorate (ClO4−) from drinking water. Recently, it become more apparent that a significant percentage total ClO4− may be due ingestion food. Most studies have only evaluated uptake and distribution by plants without considering potential for iodine (I) plant subsequent impacts human health. The objectives this research effort were evaluate relative I supplied as either KI or KIO3, two major environmental forms in standard hydroponic...

Although the majority of blueberries in The Netherlands are soil grown, interest soilless culture has increased recently. Modern cultivation with high yield and fruit quality needs maximum control growth crop development, which is expected to be achieved irrigation nutrient management. At same time, reduction losses an important issue for all crops. Both aspects realized more easily systems than soil. research discussed here focused on demand development a specific solution blueberry....

Recirculation of drainage solution reduces the emission water, nutrients and plant protection products from both substrate-based water-based growing systems. During cultivation, deviations in nutrient ratios root environment may potentially affect yield quality as well motivate a grower to discharge solution. Our objective was quantify imbalances assess what part can be prevented with practical measures. included daily balances for water individual nutrients, using data commercial...

In closed-loop soilless culture systems, the increase of electrical conductivity (EC) caused by Na+ accumulation is a major bottleneck for recycling nutrient solution if water sources are used which contain at substantial concentrations. Currently, recommended concentrations root zone tomato exceed those maximising yield, aiming to induce moderate salinity stress enhance fruit quality. A new strategy management proposed, gradually reduces target macronutrients except P in proportion Na+,...

In the Netherlands since late nineties reuse of drainage water is obligatory for all soil less growing systems, to reduce environmental pollution. However, this strategy has some important bottlenecks. Apart from technical and phytopathological aspects, accumulation Na, Cl or other residual ions could be a problem. Accumulation will occur if uptake rates are lower than concentrations in input. Recently database was established with maximum acceptable root environment sources, number crops....