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<p>With over 60% of Brazil’s pasture fields having acidic soils and varying degrees of degradation, correcting these conditions could increase the country’s agricultural output. Assess the effectiveness of varying limestone doses in correcting soil acidity, on nutrient contents in soil and plant leaves, and on soybean and sorghum yields in acidic soils under degraded pastures. Methods: The study was conducted in two fields that had been occupied by degraded pastures for over 15 years, both on Oxisols with different clay contents: Local 1 (150 and 172&#xa0;g kg<sup>− 1</sup> of clay in the 0 to 20 and 20 to 40&#xa0;cm layers, respectively) and Local 2 (519 and 569&#xa0;g kg<sup>− 1</sup> of clay in the 0 to 20 and 20 to 40&#xa0;cm layers, respectively). The experimental design was a randomized block design with four replicates. Treatments consisted of six limestone rates (0, 4, 8, 12, 16, and 20 Mg ha<sup>− 1</sup>) incorporated into the soil to a depth of 40&#xa0;cm. Results: Macro- and micronutrient concentrations in soybean leaves remained at or above appropriate levels in all treatments. Overall, liming increased pH values and Ca<sup>2+</sup> and Mg<sup>2+</sup> contents while reducing H + Al, which positively correlated with higher soybean yields. Thus, soybean yields increased by incorporating high limestone rates, reaching maximum values of 6.5 (Local 1) and 12.0 Mg ha<sup>− 1</sup> (Local 2). Conclusions: Liming can enhance the fertility of acidic soil profiles under degraded pastures for increased grain production.</p>

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Deep Liming can Transform Acidic Tropical Soils Under Degraded Pastures into High-Yielding Grain Fields

  • 期刊论文

  • 发表日期：

    2025年1月20日

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  • Silvino Guimarães Moreira,
  • Júnior Cézar Resende Silva,
  • Everton Geraldo de Morais,
  • Francielle Roberta Dias Lima,
  • Devison Souza Peixoto,
  • Hugo Carneiro de Resende,
  • Flávio Araújo de Moraes,
  • Josias Reis Flausino Gaudencio,
  • Otávio Lopes Vieira Campos

摘要

With over 60% of Brazil’s pasture fields having acidic soils and varying degrees of degradation, correcting these conditions could increase the country’s agricultural output. Assess the effectiveness of varying limestone doses in correcting soil acidity, on nutrient contents in soil and plant leaves, and on soybean and sorghum yields in acidic soils under degraded pastures. Methods: The study was conducted in two fields that had been occupied by degraded pastures for over 15 years, both on Oxisols with different clay contents: Local 1 (150 and 172 g kg− 1 of clay in the 0 to 20 and 20 to 40 cm layers, respectively) and Local 2 (519 and 569 g kg− 1 of clay in the 0 to 20 and 20 to 40 cm layers, respectively). The experimental design was a randomized block design with four replicates. Treatments consisted of six limestone rates (0, 4, 8, 12, 16, and 20 Mg ha− 1) incorporated into the soil to a depth of 40 cm. Results: Macro- and micronutrient concentrations in soybean leaves remained at or above appropriate levels in all treatments. Overall, liming increased pH values and Ca2+ and Mg2+ contents while reducing H + Al, which positively correlated with higher soybean yields. Thus, soybean yields increased by incorporating high limestone rates, reaching maximum values of 6.5 (Local 1) and 12.0 Mg ha− 1 (Local 2). Conclusions: Liming can enhance the fertility of acidic soil profiles under degraded pastures for increased grain production.