Scholarlink

<p>The objective of this study is to trace the influences of lime addition on phosphorus (P) cycling in red soil of subtropical region.&#xa0;Changes in soil biogeochemical properties, P fractions, the total bacteria community, as well as the <i>phoD</i>-harbouring bacteria community after lime amendment were explored under three fertilization treatments (urea + potassium chloride (NK); urea + superphosphate + potassium chloride (NPK); NPK + straw (NPKS)) in a long-term located experiment with continuously cropped sugarcane.&#xa0;Lime addition increased the pH, soil organic carbon (SOC) and sugarcane yield in three treatments but decreased the available P (AP) in NPK. All nine P fractions identified via sequential fractionation method were affected by lime addition. Moreover, lime addition increased the richness (Chao1 index) of the total bacteria and <i>phoD-</i>harbouring bacteria and changed their community compositions. The abundances of <i>Bradyrhizobium</i> and <i>Candidatus_Solibacter</i> in total bacteria under all treatments were increased by lime addition, and both two can promote the cycling of N and P; the abundances of <i>Variibacter</i>, <i>Frankia</i> and <i>Stella</i> under NK and <i>Pseudomonas</i> under NPKS treatment in <i>phoD</i>-harbouring bacteria were increased by lime addition, and these genera were significantly correlated with AP and specific organic P (Po) fractions. Structural equation model indicated that P transformation were significant affected by soil pH, alkaline phosphatase (ALP) activity and community richness of <i>phoD</i>-harbouring bacteria. In addition, lime addition increased the abundance of functional genes involved with N and P dynamic, anoxygenic_photoautotrophy_sulfur (S)_oxidizing.&#xa0;These findings implied that lime amendment can influence soil P transformation by altering the soil properties, community structure and ecological functions of bacteria. This research helps to understand the regulation of lime addition on shifts in P pools in red soil of subtropical region.</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

Lime Addition Affects Phosphorus Transformation by Shifting Soil Biogeochemical properties, Bacteria Community Structure and Ecological Functions in Sugarcane Soil

  • 期刊论文

  • 发表日期：

    2025年11月25日

查看全文
  • Qihua Wu,
  • Dexin Li,
  • Wenling Zhou,
  • Churong Liu,
  • Benjie Li,
  • Junhua Ao

摘要

The objective of this study is to trace the influences of lime addition on phosphorus (P) cycling in red soil of subtropical region. Changes in soil biogeochemical properties, P fractions, the total bacteria community, as well as the phoD-harbouring bacteria community after lime amendment were explored under three fertilization treatments (urea + potassium chloride (NK); urea + superphosphate + potassium chloride (NPK); NPK + straw (NPKS)) in a long-term located experiment with continuously cropped sugarcane. Lime addition increased the pH, soil organic carbon (SOC) and sugarcane yield in three treatments but decreased the available P (AP) in NPK. All nine P fractions identified via sequential fractionation method were affected by lime addition. Moreover, lime addition increased the richness (Chao1 index) of the total bacteria and phoD-harbouring bacteria and changed their community compositions. The abundances of Bradyrhizobium and Candidatus_Solibacter in total bacteria under all treatments were increased by lime addition, and both two can promote the cycling of N and P; the abundances of Variibacter, Frankia and Stella under NK and Pseudomonas under NPKS treatment in phoD-harbouring bacteria were increased by lime addition, and these genera were significantly correlated with AP and specific organic P (Po) fractions. Structural equation model indicated that P transformation were significant affected by soil pH, alkaline phosphatase (ALP) activity and community richness of phoD-harbouring bacteria. In addition, lime addition increased the abundance of functional genes involved with N and P dynamic, anoxygenic_photoautotrophy_sulfur (S)_oxidizing. These findings implied that lime amendment can influence soil P transformation by altering the soil properties, community structure and ecological functions of bacteria. This research helps to understand the regulation of lime addition on shifts in P pools in red soil of subtropical region.