Abstract Micronutrient additives for sugar beet growth and development are very important, especially in the alkaline Egyptian soil. A two-year (2017 and 2018) field experiment was conducted in the Sakha Agricultural Research Station of Agricultural Research Center, Egypt, to study the effect of the foliar treatments with micronutrients including zinc (Zn) at rates of 50 and 100 mg L−1, boron (B) at rates of 50 and 100 mg L−1, and molybdenum (Mo) at rates of 20 and 40 mg L−1 on the morphological and physiological features as well as root characteristics of sugar beet (Beta vulgaris L.). Results showed that the Zn, B, and Mo foliar treatments at the two concentrations increased the growth parameters of roots, that is, root diameter, root length, root fresh weight, and root dry weight. Likewise, the foliar applications with Zn, B, and Mo at the two applied concentrations significantly increased nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) contents in the treated sugar beet leaves and roots. The high concentration of Zn (100 mg L−1) and Mo (40 mg L−1) yielded the highest of sucrose percentage, TSS percentage, purity percentage, sugar yield, root yield, and improved yield quality as well. The foliar treatments with Zn at a rate of 100 mg L−1 and Mo a rate of 40 mg L−1 showed a high capacity for enhancing growth and yield characteristics of sugar beet in the alkaline Egyptian soil probably due to balancing nutrients uptake and translocation.

中文翻译：

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通过叶面施用的微量营养素可提高甜菜 (Beta vulgaris L.) 的生长、产量和质量

摘要 微量营养素添加剂对甜菜生长发育非常重要，特别是在埃及碱性土壤中。在埃及农业研究中心的萨哈农业研究站进行了为期两年（2017 年和 2018 年）的田间试验，以研究叶面处理微量元素锌（Zn）的效果，包括锌 (Zn)，用量为 50 和 100 mg L− 1、硼 (B) 50 和 100 mg L-1 和钼 (Mo) 20 和 40 mg L-1 对甜菜 (Beta vulgaris L) 的形态和生理特征以及根系特征的影响.) 结果表明，两种浓度的 Zn、B 和 Mo 叶面处理均增加了根的生长参数，即根直径、根长、根鲜重和根干重。同样，叶面喷施锌、硼、和钼在两种施用浓度下显着增加了处理过的甜菜叶和根中的氮 (N)、磷 (P)、钾 (K)、钙 (Ca) 和镁 (Mg) 含量。高浓度的 Zn (100 mg L-1) 和 Mo (40 mg L-1) 产生最高的蔗糖百分比、TSS 百分比、纯度百分比、糖产量、根产量和改善的产量质量。用 100 mg L-1 的 Zn 和 40 mg L-1 的 Mo 进行叶面处理显示出在碱性埃及土壤中提高甜菜生长和产量特性的高能力，这可能是由于平衡养分吸收和转运. 高浓度的 Zn (100 mg L-1) 和 Mo (40 mg L-1) 产生最高的蔗糖百分比、TSS 百分比、纯度百分比、糖产量、根产量和改善的产量质量。用 100 mg L-1 的 Zn 和 40 mg L-1 的 Mo 进行叶面处理显示出在碱性埃及土壤中提高甜菜生长和产量特性的高能力，这可能是由于平衡养分吸收和转运. 高浓度的 Zn (100 mg L-1) 和 Mo (40 mg L-1) 产生最高的蔗糖百分比、TSS 百分比、纯度百分比、糖产量、根产量和改善的产量质量。用 100 mg L-1 的 Zn 和 40 mg L-1 的 Mo 进行叶面处理显示出在碱性埃及土壤中提高甜菜生长和产量特性的高能力，这可能是由于平衡养分吸收和转运.