📊 Repere fiziologice — Culturi Hidroponice

Cultură / taxon: Culturi hidroponice · Hidroponie / cultură fără sol — sistem multicrops; interpretare specie × fenofază × tehnologie

Rol agronomic: Hydroponics is a production system, not a botanical crop; EC/pH targets and nutrient recipes must be species- and stage-specific.

Mod de aplicare: —

Condiție de aplicare: UF/IFAS: nutrient formulation and EC should be adjusted as crop matures; water analysis is one of the first steps for pH, bicarbonate, Ca, Mg, S, Fe.

Obiectiv: Avoid system-level recommendations disconnected from species.

Risc descris: A lettuce EC/N program transferred to tomato/cucumber can be severely wrong.

Cultură / taxon: Culturi hidroponice · Hidroponie / cultură fără sol — sistem multicrops; interpretare specie × fenofază × tehnologie

Rol agronomic: EC should generally start lower and increase gradually as crop demand increases.

Mod de aplicare: —

Condiție de aplicare: UF/IFAS greenhouse hydroponics: delivered nutrient solution commonly EC ~1,5–3,5 dS/m in Florida systems, with young crops started at lower end; this is NOT a universal crop EC range.

Obiectiv: Prevent osmotic stress and undernutrition.

Risc descris: High EC in young crop can reduce water uptake; low EC can underfeed.

Cultură / taxon: Culturi hidroponice · Hidroponie / cultură fără sol — sistem multicrops; interpretare specie × fenofază × tehnologie

Rol agronomic: Most nutrients are best available around mildly acidic pH, but exact target depends on crop/system.

Mod de aplicare: —

Condiție de aplicare: UF/IFAS greenhouse: most elements best absorbed in media pH 5,5–6,5; hydroponic solution P availability favored around pH 5,6–6,0. High pH reduces P/micronutrient availability.

Obiectiv: Maintain root-zone availability.

Risc descris: Foliar rescue without correcting pH creates recurrent deficiency.

Cultură / taxon: Culturi hidroponice · Hidroponie / cultură fără sol — sistem multicrops; interpretare specie × fenofază × tehnologie

Rol agronomic: In substrate systems, leachate EC reveals accumulation not visible from feed EC alone.

Mod de aplicare: —

Condiție de aplicare: UF/IFAS: leachate EC in soilless media should generally not differ by more than ~1,0 dS/m from applied nutrient solution in its production guideline.

Obiectiv: Stable osmotic environment and nutrient balance.

Risc descris: Salt build-up reduces water uptake and can mimic nutrient deficiencies.

Cultură / taxon: Culturi hidroponice · Hidroponie / cultură fără sol — sistem multicrops; interpretare specie × fenofază × tehnologie

Rol agronomic: Supply should fall as sink demand falls; solution should not be maintained at peak concentration until crop removal.

Mod de aplicare: —

Condiție de aplicare: Hydroponic nutrient management is dynamic; formulation and EC must match crop maturity/demand.

Obiectiv: Economic close and clean transition.

Risc descris: Late excessive EC wastes fertilizer and increases disposal/sanitation burden.