The correct estimation of the mineral content of cassava (Manihot esculenta) genotypes is vital from a nutritional point of view. This study evaluated the effects of the storage root section, maturity, and sampling method on the macro- and microelements in yellow-fleshed cassava root genotypes. In total, 44 genotypes were grown in replicated field trials of 2 sets (set 25 and set 19) and were harvested at 9 and 12 months after planting. Two sampling methods, sampling with a cork borer (A = proximal, B = middle, C = distal or method 1) and sampling without a cork borer (L = Longitudinal or method 2), were used. The minerals of the samples from the two methods were determined using inductively coupled optical emission spectrometry (ICP-OES). K and Mn were the most abundant minerals, and Na, Mo, and Co were the least abundant. Genotype, method, and maturity had a strong influence on mineral concentrations. Harvesting time affected the concentration level of some macro- and microelements in cassava roots. Additionally, Ca, Mg, K, P, Mn, Cu, Ni, and Zn contents were significantly (p < 0.05) higher in the proximal and middle portions for method 1. K and P and Mn and B were positively correlated, but K and Na and Fe and Ni were negatively associated.

中文翻译：

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黄皮木薯（Manihot esculenta Crantz）基因型中宏观和微量元素随贮藏根部分，收获时间和采样方法的变化

木薯（Manihot esculenta）矿物质含量的正确估算从营养的角度来看，基因型至关重要。本研究评估了贮藏根切片，成熟度和取样方法对黄肉木薯根基因型中宏观和微量元素的影响。在重复的田间试验中，总共有44种基因型（2组（第25组和19组））在种植后9个月和12个月收获。使用了两种取样方法，一种是用软木钻（A =近端，B =中间，C =远端或方法1）取样，而没有用软木钻（L =纵向或方法2）取样。使用电感耦合光发射光谱法（ICP-OES）确定了两种方法中样品的矿物质。钾和锰含量最高，而钠，钼和钴含量最低。基因型，方法和成熟度对矿物质浓度有很大影响。收获时间影响了木薯根中某些宏观和微量元素的浓度水平。此外，钙，镁，钾，磷，锰，铜，镍和锌的含量也显着（方法1的近端和中间部分的p <0.05）较高。K和P与Mn和B正相关，而K和Na与Fe和Ni负相关。