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<p>This study examined how intercropping rubber (<i>Hevea brasiliensis</i>) with sharpleaf galangal (<i>Alpinia oxyphylla Miq.</i>), coffee (<i>Coffea arabica L.</i>), and kinggrass (<i>Pennisetum purpureum Schumach.</i> × <i>Pennisetum glaucum</i> (<i>L.</i>) <i>R.Br.</i>) affects soil properties and microbial communities in rubber plantations. Using Illumina MiSeq sequencing, we analyzed soil bacterial and fungal community structures under different intercropping treatments and examined their relationships with soil physicochemical factors. The results showed that intercropping significantly altered soil moisture, organic carbon, and available phosphorus/potassium, as well as total phosphorus/potassium content. However, it did not considerably affect pH or nitrogen content. PCoA analysis revealed significant differences in soil bacterial and fungal community characteristics between intercropped rubber plantations and pure rubber plantations, with higher richness and diversity of bacterial communities (34 identified phyla, including dominant groups like Firmicutes, Proteobacteria, and Acidobacteria) in intercropped rubber plantations and lower diversity of fungal communities (17 phyla, dominated by Ascomycota, Basidiomycota) compared to the control. Notably, intercropping reduced the abundance of dominant fungal groups but increased that of some unknown fungal taxa. Correlation analysis of the abundance of bacterial genera and soil physicochemical properties revealed that soil pH, organic carbon, moisture, available phosphorus, total nitrogen, and total phosphorus were the primary factors influencing the microbial community structure in rubber plantations. Notably, a higher correlation was observed between fungal communities and physicochemical factors than between bacterial communities and these factors. These results demonstrate that intercropping can effectively modify soil nutrient profiles and microbial communities in rubber plantations. In cultivation management, the strategic selection of intercropping partners can enhance soil fertility, improve crop productivity, and boost plantation resilience through targeted management of the microbial community. This study provides valuable insights for developing sustainable rubber plantation management through optimized intercropping patterns.</p>

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Diversity characteristics of soil microbial communities in intercropping rubber plantations

  • 期刊论文

  • 发表日期：

    2026年3月20日

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  • Chunmei Zhao,
  • Jinku Li,
  • Chen He,
  • Xiaobo Li,
  • Wentao Peng

摘要

This study examined how intercropping rubber (Hevea brasiliensis) with sharpleaf galangal (Alpinia oxyphylla Miq.), coffee (Coffea arabica L.), and kinggrass (Pennisetum purpureum Schumach. × Pennisetum glaucum (L.) R.Br.) affects soil properties and microbial communities in rubber plantations. Using Illumina MiSeq sequencing, we analyzed soil bacterial and fungal community structures under different intercropping treatments and examined their relationships with soil physicochemical factors. The results showed that intercropping significantly altered soil moisture, organic carbon, and available phosphorus/potassium, as well as total phosphorus/potassium content. However, it did not considerably affect pH or nitrogen content. PCoA analysis revealed significant differences in soil bacterial and fungal community characteristics between intercropped rubber plantations and pure rubber plantations, with higher richness and diversity of bacterial communities (34 identified phyla, including dominant groups like Firmicutes, Proteobacteria, and Acidobacteria) in intercropped rubber plantations and lower diversity of fungal communities (17 phyla, dominated by Ascomycota, Basidiomycota) compared to the control. Notably, intercropping reduced the abundance of dominant fungal groups but increased that of some unknown fungal taxa. Correlation analysis of the abundance of bacterial genera and soil physicochemical properties revealed that soil pH, organic carbon, moisture, available phosphorus, total nitrogen, and total phosphorus were the primary factors influencing the microbial community structure in rubber plantations. Notably, a higher correlation was observed between fungal communities and physicochemical factors than between bacterial communities and these factors. These results demonstrate that intercropping can effectively modify soil nutrient profiles and microbial communities in rubber plantations. In cultivation management, the strategic selection of intercropping partners can enhance soil fertility, improve crop productivity, and boost plantation resilience through targeted management of the microbial community. This study provides valuable insights for developing sustainable rubber plantation management through optimized intercropping patterns.