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<p>Compost amendment is an eco-friendly means to enhance soil health and crop productivity. However, studies correlating the compost prokaryotic diversity and nutrient profiles with the soil and plant health remain limited. The present study compared the nutrient content and prokaryotic diversity associated with seven compost types derived from different feedstocks, and evaluated their effects on soil nutrients, and growth and yield parameters of tomato plant to identify the most suitable compost for tomato cultivation. Targeted 16S rRNA gene sequencing-based analysis revealed that rice compost was distinct from other compost samples, characterized by the lowest alpha diversity and a significantly divergent community composition. It showed a decreased abundance of important bacterial phyla, namely Actinobacteriota (1.33%), Acidobacteriota (0.07%), and Chloroflexi (2.02%), and a low nutrient content and yield attributes. Interestingly, despite these limitations, rice compost-treated plants produced fruits with the highest lycopene content. Farmyard manure revealed higher alpha diversity, significantly distinct prokaryotic community composition with higher relative abundance of Proteobacteria (30.91%), whereas vermicompost was enriched in Actinobacteriota (20.92%). Both farmyard manure and vermicompost enhanced the plant growth and yield attributes. At the harvest stage, available soil copper was positively correlated with plant dry weight, root length, and lycopene content, while zinc was negatively correlated with shoot length. Our findings highlight the correlations between prokaryotic diversity, plant growth, and yield attributes, suggesting that composts with higher prokaryotic diversity harbouring beneficial bacterial genera may be more suitable for improving soil and plant health.</p>

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Compost type as driver of soil and plant health: source matters

  • 期刊论文

  • 发表日期：

    2026年7月3日

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  • Soumya Sahai Saxena,
  • Sriya Mistry,
  • Namrata Jiya,
  • Yashbir S. Shivay,
  • Avinash Sharma,
  • Shilpi Sharma

摘要

Compost amendment is an eco-friendly means to enhance soil health and crop productivity. However, studies correlating the compost prokaryotic diversity and nutrient profiles with the soil and plant health remain limited. The present study compared the nutrient content and prokaryotic diversity associated with seven compost types derived from different feedstocks, and evaluated their effects on soil nutrients, and growth and yield parameters of tomato plant to identify the most suitable compost for tomato cultivation. Targeted 16S rRNA gene sequencing-based analysis revealed that rice compost was distinct from other compost samples, characterized by the lowest alpha diversity and a significantly divergent community composition. It showed a decreased abundance of important bacterial phyla, namely Actinobacteriota (1.33%), Acidobacteriota (0.07%), and Chloroflexi (2.02%), and a low nutrient content and yield attributes. Interestingly, despite these limitations, rice compost-treated plants produced fruits with the highest lycopene content. Farmyard manure revealed higher alpha diversity, significantly distinct prokaryotic community composition with higher relative abundance of Proteobacteria (30.91%), whereas vermicompost was enriched in Actinobacteriota (20.92%). Both farmyard manure and vermicompost enhanced the plant growth and yield attributes. At the harvest stage, available soil copper was positively correlated with plant dry weight, root length, and lycopene content, while zinc was negatively correlated with shoot length. Our findings highlight the correlations between prokaryotic diversity, plant growth, and yield attributes, suggesting that composts with higher prokaryotic diversity harbouring beneficial bacterial genera may be more suitable for improving soil and plant health.