A field experiment was carried out at the Research Center of Barkat-e-Jovein, Jovein agro-industries, Northeastern Iran, during 2008 to evaluate the effect of concentration and time of boron foliar application on root yield and quality of sugar beet (Beta vulgaris). Treatments consisted of 3 application times (30, 45 and 60 DAP) and 4 application rates (spraying with concentrations of 0, 4, 8 and 12?? corresponding with 0, 0.35, 0.70 and 1.22 kg B haG1 as water-soluble B (Boric acid)). Results revealed that application time had no considerable effect on sucrose concentration, root yield, k+, Na+, molasses sugar, nor on reducing nitrogen. Boron application increased root yield and sucrose concentration by 12.12% and 26.35%, respectively, decreasing k+, Na+, "-amino-N and molasses sugar compared with those of the control. In this study, no significant differences were found to exist between boron application times. On the other hand, the highest root yield and sucrose concentration were obtained by spraying with 12?? boric acid at 60 days after planting.
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机译：2008年期间，在伊朗东北部Jovein农产品工业的Barkat-e-Jovein研究中心进行了田间试验，以评估叶面施用硼的浓度和时间对甜菜根茎产量和品质的影响。 ）。处理包括3次施药时间（30、45和60 DAP）和4次施药量（浓度分别为0、4、8和12？的喷雾，分别对应于水溶性B，0、0.35、0.70和1.22 kg B haG1（硼酸））。结果表明，施用时间对蔗糖浓度，根产量，k +，Na +，糖蜜糖和还原氮均无显着影响。与对照相比，施用硼分别使根产量和蔗糖浓度分别提高了12.12％和26.35％，降低了k +，Na +，“-氨基-N和糖蜜”糖。在这项研究中，发现硼之间无显着差异。另一方面，在种植后第60天喷12 12硼酸可获得最高的根产量和蔗糖浓度。
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