📊 Repere fiziologice — Piersic

Cultură / taxon: Piersic · Prunus persica (L.) Batsch

Rol agronomic: B/Zn may be limiting if deficient. Nutritional Mn/B do not prevent Taphrina/Monilinia.

Mod de aplicare: 500–800 L/ha

Condiție de aplicare: Penn State peach/nectarine normal leaf: N 2,50–3,40%; P 0,15–0,30%; K 2,10–3,00%; Ca 1,90–3,50%; Mg 0,20–0,40%; B 25–50 ppm; Zn 20–200 ppm.

Obiectiv: Înflorire și frunză sănătoasă.

Risc descris: Leaf ranges are not flower targets and nutrition is not disease control.

Cultură / taxon: Piersic · Prunus persica (L.) Batsch

Rol agronomic: Excess N can reduce color and firmness; K/Ca/Mg balance matters during fruit growth.

Mod de aplicare: 700–900 L/ha

Condiție de aplicare: Penn State normal peach/nectarine leaf K 2,10–3,00%, Ca 1,90–3,50%, Mg 0,20–0,40%. USU also warns excess N reduces color and storage firmness.

Obiectiv: Fruit set and early sizing.

Risc descris: Ca foliar cannot be claimed to eliminate softening or cracking; N excess may worsen quality.

Cultură / taxon: Piersic · Prunus persica (L.) Batsch

Rol agronomic: K supports fruit growth but repeated KS must stop if tissue is already sufficient/high.

Mod de aplicare: 700–900 L/ha

Condiție de aplicare: Penn State peach/nectarine normal K 2,10–3,00%; high >3,00%. High category is not an application target.

Obiectiv: Umplere și fotosinteză.

Risc descris: High leaf K should not trigger more K merely for Brix.

Cultură / taxon: Piersic · Prunus persica (L.) Batsch

Rol agronomic: Quality is cultivar/maturity/crop-load dependent; late K/Ca can support but not guarantee export firmness or Brix.

Mod de aplicare: 700–900 L/ha

Condiție de aplicare: Current ROfert direct page states no species-specific phenophase scheme is published, overriding older indexed scheme text.

Obiectiv: Maturitate și calitate.

Risc descris: No numerical Brix/firmness/shelf-life claim is carried into technology.

Cultură / taxon: Piersic · Prunus persica (L.) Batsch

Rol agronomic: Perennial orchard program should follow leaf status, vigor and crop load; excess late N harms hardening.

Mod de aplicare: 500–700 L/ha

Condiție de aplicare: Penn State foliar interpretation is intended to guide nutrient decisions; USU notes excess N causes poor color and reduced storage firmness.

Obiectiv: Next-year reserve and hardening.

Risc descris: Routine late MAX can be counterproductive when N is normal/high.