Abstract The mineral nutrient ratios are parameters for evaluating the crop nutritional balance through foliar analysis. This study aimed to verify the correlations between the main mineral nutrient ratios in leaves and the cacao productivity of 48 cropping areas. The chemical analyses were carried out to determine foliar N, P, K, Ca, Mg, S, Fe, Zn, Cu and Mn nutrient concentrations. The Zn/Cu and the Ca/Mg ratios showed a positive nutritional relation with cacao productivity. The ratios with Cu as denominator – Mn/Cu, Ca/Cu, Mg/Cu, P/Cu, N/Cu and K/Cu – also showed a positive nutritional relation with cacao productivity. The P/Zn and N/Zn nutrient ratios showed a negative nutritional relation with the cacao productivity.

中文翻译：

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矿物质营养比和可可生产力

摘要 矿质养分比是通过叶面分析评价作物营养平衡的参数。本研究旨在验证48个种植区叶片中主要矿质养分比例与可可产量之间的相关性。进行化学分析以确定叶面的 N、P、K、Ca、Mg、S、Fe、Zn、Cu 和 Mn 养分浓度。Zn/Cu 和 Ca/Mg 比值与可可产量呈正相关。以 Cu 为分母的比率——Mn/Cu、Ca/Cu、Mg/Cu、P/Cu、N/Cu 和 K/Cu——也显示出与可可生产力的正营养关系。P/Zn 和 N/Zn 养分比与可可生产力呈负相关。