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首页> 外文期刊>Australian Journal of Crop Science >Application of nitrogen fertilizer in high-demand stages of soybean and its effects on yield performance
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Application of nitrogen fertilizer in high-demand stages of soybean and its effects on yield performance

机译：氮肥在大豆高产期的应用及对产量的影响

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The typical nitrogen supply recommendation for soybeans is the application of inoculant with no additional required supplementation via fertilization. However, the adoption of no-till farming, the release of high-yielding cultivars and recent studies concerning soybean response to late application of nitrogen have sparked doubts about the possible benefits of nitrogen fertilization. Recent studies using nitrogen fertilization of soybeans show no increase in yield, due to efficient biological fixation (BNF); however, the effects of different application times have not been widely studied. In this context, the aim of this study was to investigate different methods and times of nitrogen fertilization of soybeans. Using the recommended supplements, along with a search of the scientific literature on the same theme, nine treatments were evaluated. These consisted of the application of single and split doses of nitrogen, at 20 kg.ha-1 and 40 kg.ha-1, during sowing and reproductive stage R4. The nitrogen source used was urea (45% nitrogen). It was applied in adequate environmental conditions, at levels typically found in rain forecasts, and were incorporated into the soil to avoid losses by volatilization. The split application of nitrogen (at sowing + stage R4) provided an increase in yield, reaching a 47% difference in treatment 6 in relation to control, not taking into account supplementation costs. Furthermore, the variables related to plant architecture displayed no significant differences.
机译：大豆的典型氮供应建议是使用接种剂，而无需通过施肥额外补充。但是，采用免耕种植，高产品种的释放以及有关大豆对后期施用氮肥的反应的最新研究，引发了人们对氮肥可能带来的好处的怀疑。最近的研究表明，由于有效的生物固定（BNF），大豆的氮肥施用并未使产量增加。但是，尚未广泛研究不同应用时间的影响。在这种情况下，本研究的目的是研究大豆氮肥施用的不同方法和时间。使用推荐的补品，以及对同一主题的科学文献的搜索，对9种治疗方法进行了评估。这些包括在播种和生殖阶段R4期间分别施用20 kg.ha-1和40 kg.ha-1的单剂量和分剂量的氮。使用的氮源是尿素（45％氮）。它已在适当的环境条件下（通常在降雨预报中发现的水平）施用，并掺入土壤中以避免挥发损失。分开施用氮肥（在播种+ R4阶段）提高了产量，与对照相比，处理6的差异达到了47％，而没有考虑补充成本。此外，与工厂架构相关的变量没有显示出显着差异。

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