Scholarlink

<p>Determine the soil quality and the emissions of mineralizable soil carbon (C-CO<sub>2</sub>) in conventional and integrated systems in the Midwest region of Brazil. Methods: The evaluated systems include original pasture (OP), reformed pasture (RP), conventional tillage (CT), direct seeding (DS), and cultivated eucalyptus forest (CF), as well as crop-livestock integration (CLI) and crop-livestock-forest integration (CLFI) systems in both the pasture phase (p) and crop phase (c). The soil organic carbon (SOC), carbon and carbon stock (StoC) of the particulate organic matter (C-POM) and mineral-associated organic matter (C-OMM) fractions, indexes of soil quality, and daily CO<sub>2</sub> emission and accumulation in the 0–0.05, 0.05–0.10, 0.10–0.20, and 0.20–0.40&#xa0;m layers were determined. Results: The CLI<sub>p</sub> and CLI<sub>c</sub> systems had the highest SOC contents, reaching 15.47 and 15.04&#xa0;g&#xa0;kg<sup>−1</sup> of C in the 0–0.05&#xa0;m layer, respectively. For C-POM, the integrated systems in the pasture phase had the highest contents and stocks, storing up to 19 t ha<sup>−1</sup> at 0.4&#xa0;m. For C-OMM, CLIc had the highest contents and stocks, storing up to 57 t ha<sup>−1</sup> of C up to 0.4&#xa0;m. The systems with pasture had the best carbon management indexes. The LI, L, C-POM stock, and CMI remained the most representative variables related to the CLFIp system. Conclusions: integrated systems improve soil quality and store Carbon, especially in recalcitrant fractions of the SOM, with reduced C-CO<sub>2</sub> emissions, helping to mitigate climate change in the Central-West region of Brazil.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Soil Quality and CO2 Emissions in Response to Six Years of Conventional and Integrated Agricultural Production in the Central-West Region of Brazil

  • 期刊论文

  • 发表日期：

    2025年3月19日

查看全文
  • Camila Beatriz da Silva Souza,
  • Paulo Guilherme da Silva Farias,
  • Jean Sérgio Rosset,
  • Jolimar Antonio Schiavo,
  • Jefferson Matheus Barros Ozório,
  • Naelmo de Souza Oliveira,
  • Roseline da Silva Coêlho,
  • Michely Tomazi,
  • Júlio Cesar Salton

摘要

Determine the soil quality and the emissions of mineralizable soil carbon (C-CO2) in conventional and integrated systems in the Midwest region of Brazil. Methods: The evaluated systems include original pasture (OP), reformed pasture (RP), conventional tillage (CT), direct seeding (DS), and cultivated eucalyptus forest (CF), as well as crop-livestock integration (CLI) and crop-livestock-forest integration (CLFI) systems in both the pasture phase (p) and crop phase (c). The soil organic carbon (SOC), carbon and carbon stock (StoC) of the particulate organic matter (C-POM) and mineral-associated organic matter (C-OMM) fractions, indexes of soil quality, and daily CO2 emission and accumulation in the 0–0.05, 0.05–0.10, 0.10–0.20, and 0.20–0.40 m layers were determined. Results: The CLIp and CLIc systems had the highest SOC contents, reaching 15.47 and 15.04 g kg−1 of C in the 0–0.05 m layer, respectively. For C-POM, the integrated systems in the pasture phase had the highest contents and stocks, storing up to 19 t ha−1 at 0.4 m. For C-OMM, CLIc had the highest contents and stocks, storing up to 57 t ha−1 of C up to 0.4 m. The systems with pasture had the best carbon management indexes. The LI, L, C-POM stock, and CMI remained the most representative variables related to the CLFIp system. Conclusions: integrated systems improve soil quality and store Carbon, especially in recalcitrant fractions of the SOM, with reduced C-CO2 emissions, helping to mitigate climate change in the Central-West region of Brazil.