The aim of this research work was to identify the Boundary-Line Approach (B-LA) macro-nutrient optimum concentrations linked to maximum yield and sufficiency ranges at 90% maximum yield per 1-year-old fructification cladode for Opuntia ficus-indica (L.) Miller variety “Rojo Pelon”. Four years’ (2012–2015) data of yield per fructification cladode and macro-nutrient concentration [nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), or magnesium (Mg)] were used to elaborate bivariate scatter diagrams (n = 228). Selection from 9 to 11 points was performed to estimate quadratic functions as boundary-lines in each bivariate scatter diagram. The vertices allowed estimation of the optimum macro-nutrient concentrations: ln N = 2.32 (10.20 g kg−1), P = 3.04 g kg−1, K = 35.18 g kg−1, Ca = 36.65 g kg−1, Mg = 13.83 g kg−1. The target maximum yield per fructification cladode varies between 1901.13 and 1984.41 g. The estimated sufficiency ranges at 90% of the maximum yield are ln N = 2.07–2.59 (7.86–13.40 g kg−1), P = 2.54–3.54 g kg−1, K = 25.36–45.01 g kg−1, Ca = 27.96–45.35 g kg−1, and Mg = 10.3–17.38 g kg−1. These nutrient standards may be used as a reference for maximizing yield per fructification cladode in O. ficus-indica, specifically for the variety “Rojo Pelon”.

中文翻译：

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Opuntia ficus-indica (L.) Miller 品种“Rojo Pelón”结果的边界线方法宏观营养标准

这项研究工作的目的是确定边界线法 (B-LA) 宏量营养素最佳浓度与最大产量和充足范围相关，每 1 年生果枝的最高产量为 90%，仙人掌（Opuntia ficus-indica）。 L.) 米勒品种“Rojo Pelon”。四年（2012 年至 2015 年）每个果实枝叶产量和常量营养素浓度 [氮 (N)、磷 (P)、钾 (K)、钙 (Ca) 或镁 (Mg)] 的数据被用于详细说明双变量散点图（n = 228）。执行从 9 到 11 个点的选择以估计二次函数作为每个二元散点图中的边界线。顶点允许估计最佳常量营养素浓度：ln N = 2.32 (10.20 g kg−1)，P = 3.04 g kg−1，K = 35.18 g kg−1，Ca = 36.65 g kg−1，Mg = 13.83 克公斤-1。每个果实化枝条的目标最大产量在 1901.13 和 1984.41 克之间变化。最大产量 90% 的估计充足范围为 ln N = 2.07–2.59 (7.86–13.40 g kg−1)，P = 2.54–3.54 g kg−1，K = 25.36–45.01 g kg−1，Ca = 27.96–45.35 g kg−1，Mg = 10.3–17.38 g kg−1。这些营养标准可用作使 O. ficus-indica（特别是“Rojo Pelon”品种）的每个果实枝条产量最大化的参考。