Moderate levels of zinc (3.50, 1.75 or 0.875 μmol·L?1 Zn) or copper (0.75, 0.38 or 0.19 μmol·L?1 Cu), in combination with a complete suite of other essential nutrients, were supplied up to flower bud break only, to two cultivars of subirrigated, potted, pinched chrysanthemums. Market-quality plants were produced with sufficient leaf-zinc or leaf-copper even though the delivery of the respective nutrient could be reduced by 75% compared with an industry standard. These results are interpreted as evidence for improved uptake efficiency with decreasing Zn or Cu delivery. Our modified delivery practice could contribute to low-input production of floricultural crops.
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18 August 2020
Improving zinc and copper delivery for subirrigated greenhouse-grown pot chrysanthemums
Barry J. Shelp,
Edward J. Flaherty,
Skye Duncan Stephens,
Alyna J. Donetz
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chrysanthemum
greenhouse floriculture
nutrient delivery
nutrient use efficiency
subirrigation