Abstract A 2-yr field experiment (2017/18 and 2018/19) was conducted to study the influence of nitrogen (N) at three levels (190 = N1, 240 = N2, and 290 = N3 kg N ha−1), zinc (Zn) at three levels (0 = Zn0, 3.5 = Zn1, and 7 = Zn2 kg ha−1), and boron (B) at three levels (0 = B0, 1.2 = B1, and 2.4 = B2 kg ha−1) on sugar beet’s morpho-physiological attributes and productivity, technological sugar contents, and N-use efficiency based on root yield (RY-NUE). With the increment of N-fertilization level from N1 to N3 (290 kg ha−1) the root growth parameters, SPAD value, and root, top, biological, gross sugar and extractable sugar yields significantly increased; however, sucrose %, extractable sugar %, and purity % decreased. Zn2 (7 kg ha−1) and B2 (2.4 kg ha−1) significantly exceeded Zn0 and B0, respectively, in root growth, SPAD value, sucrose %, extractable %, yields, RY-NUE, and purity %. Also, significant decrements in impurities occurred (i.e., Na, K, and α-amino-N) along with a loss in sugar % in both seasons. Correlation analysis showed that root yield and root fresh weight had highly significant positive r values with extractable sugar and root yields, respectively. Integration of N3 + Zn2 + B2 improved the growth, SPAD value, sugar yields and their qualities, and RY-NUE of beet in a nutrients-deficient soil under semi-arid conditions.

中文翻译：

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氮、锌和硼在营养缺乏土壤中的综合应用提高了半干旱条件下甜菜生产力和技术糖含量

摘要 进行了为期 2 年的田间试验（2017/18 和 2018/19），研究了三个水平（190 = N1、240 = N2 和 290 = N3 kg N ha−1）氮（N）的影响，三个水平的锌 (Zn)（0 = Zn0、3.5 = Zn1 和 7 = Zn2 kg ha−1）和三个水平的硼 (B)（0 = B0、1.2 = B1 和 2.4 = B2 kg ha−1） 1) 基于根产量 (RY-NUE) 的甜菜形态生理属性和生产力、技术糖含量和氮利用效率。随着施氮水平从N1增加到N3（290 kg ha-1），根系生长参数、SPAD值以及根系、顶部、生物、总糖和可提取糖产量显着增加；然而，蔗糖 %、可提取糖 % 和纯度 % 下降。Zn2 (7 kg ha-1) 和 B2 (2.4 kg ha-1) 在根生长、SPAD 值、蔗糖 %、可提取百分比、产率、RY-NUE 和纯度百分比。此外，两个季节中杂质（即 Na、K 和 α-氨基-N）显着减少，同时糖分减少。相关性分析表明，根产量和根鲜重分别与可提取糖和根产量具有极显着的正 r 值。N3 + Zn2 + B2 的整合改善了半干旱条件下营养缺乏土壤中甜菜的生长、SPAD 值、糖产量及其品质以及 RY-NUE。