Abstract

Pink, blue, and red hydrangea [(Hydrangea macrophylla subsp. Macrophylla var. macrophylla (Thunb.)] cultivars contain the anthocyanin pigment delphinidin-3-glucoside that color the sepal. Without aluminum (Al), the natural color of the pigment is pink or red depending on the cultivar. To produce blue sepals, plants are fertilized with Al₂(SO₄)₃ (AS) under low phosphorus (P) conditions. To determine the effect of AS on nutrient tissue concentrations ‘Early Blue’, ‘Hor Tivoli’, ‘Jip’, and ‘Mathilda Gutges’ plants were treated with 0 (pink), 12, or 15 g (blue) of AS. Pre-bloom leaf tissue concentrations were analyzed with blue cultivars generally having higher concentrations of sulfur (S), iron (Fe), manganese (Mn), zinc (Zn), boron (B), copper (Cu), and Al, while the pink plants had higher nitrogen (N), P, calcium (Ca), and magnesium (Mg) concentrations. Concentrations of N, potassium (K), Mg, B and Cu were consistent with published sufficiency ranges regardless of color or cultivar, while S, Fe, Mn and Zn concentrations were below sufficiency in some pink cultivars. The P concentrations in both pink and blue cultivars and Ca in some blue cultivars were lower than the published sufficiency range. The difference in leaf tissue nutrient concentrations among cultivars and coloration, suggest that nutrient uptake in hydrangeas varies and that lab recommendations should be customized depending on cultivar and color production system.

摘要

粉红色、蓝色和红色绣球花 [( Hydrangea macrophylla subsp. Macrophylla var. macrophylla (Thunb.)] 栽培品种含有花青素色素 Delphinidin-3-glucoside 为萼片着色。没有铝 (Al)，色素的自然颜色是粉红色或红色取决于栽培品种。为了产生蓝色萼片，植物用 Al ₂ (SO ₄ ) ₃施肥(AS) 在低磷 (P) 条件下。为了确定 AS 对营养组织浓度的影响，“Early Blue”、“Hor Tivoli”、“Jip”和“Mathilda Gutges”植物用 0（粉红色）、12 克或 15 克（蓝色）AS 处理。使用通常具有较高浓度硫 (S)、铁 (Fe)、锰 (Mn)、锌 (Zn)、硼 (B)、铜 (Cu) 和铝的蓝色栽培品种分析开花前叶组织浓度，而粉红色植物具有较高的氮 (N)、P、钙 (Ca) 和镁 (Mg) 浓度。无论颜色或品种如何，N、钾 (K)、Mg、B 和 Cu 的浓度都与公布的充足范围一致，而某些粉红色品种的 S、Fe、Mn 和 Zn 浓度低于充足范围。粉红色和蓝色品种的 P 浓度和一些蓝色品种的 Ca 浓度低于公布的充足范围。栽培品种和颜色之间叶组织营养浓度的差异表明，绣球花的营养吸收各不相同，实验室建议应根据栽培品种和颜色生产系统进行定制。