ABSTRACT Increasingly intensive cropping systems and the introduction of new genetically modified cultivars can lead to a distinct demand for nutrients in soybean crops. This study aims to evaluate the response of two soybean cultivars [with and without tolerance to glyphosate (RR)] to sulfur (S) rates. The experimental design was completely randomized in a 6 × 2 factorial arrangement with four replicates. The treatments consisted of six S rates (0, 10, 20, 40, 80, and 120 mg kg−1) and two soybean cultivars from the same breeding program (BRS 317 and BRS 360RR). The increase in S rates resulted in the herbicide sensitive cultivar (BRS 317) having the best physiological indexes (water use efficiency and chlorophyll content) when compared with those of herbicide tolerant cultivar (BRS 360RR), and an increased grain yield (GY), shoot dry weight yield (SDWY), calcium (Ca), boron (B), NO2-N, and iron (Fe) concentration in the leaf tissues. This indicates that the RR gene can cause significant differences in S uptake responses.

中文翻译：

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常规和转基因大豆：硫肥下生产力的生理和营养差异

摘要 日益集约化的种植系统和新的转基因品种的引入会导致大豆作物对养分的明显需求。本研究旨在评估两个大豆品种 [对草甘膦 (RR) 有耐受性和无耐受性] 对硫 (S) 率的反应。实验设计以 6 × 2 因子排列完全随机化，重复四次。处理包括六个 S 比率（0、10、20、40、80 和 120 mg kg-1）和来自同一育种计划的两个大豆品种（BRS 317 和 BRS 360RR）。S率的增加导致除草剂敏感品种（BRS 317）与耐除草剂品种（BRS 360RR）相比具有最佳生理指标（水分利用效率和叶绿素含量），并增加了谷物产量（GY），叶组织中的芽干重产量 (SDWY)、钙 (Ca)、硼 (B)、NO2-N 和铁 (Fe) 浓度。这表明 RR 基因可以导致 S 吸收反应的显着差异。