In regions with seasonal frozen soil, freeze-thaw cycles (FTCs) can significantly influence soil environments and microbial genes. A recent study delved into this intricate relationship, specifically examining how biochar application affects soil carbon and nitrogen cycling under FTCs.

The researchers conducted an indoor soil column simulation test, introducing varying biochar application rates (0%, 1%, 2%). Using real-time fluorescence quantitative PCR technology, they analyzed carbon and nitrogen cycle functional genes as indicator genes.

Key findings include biochar’s positive impact on soil water-holding capacity, available nutrients, and environmental resilience. Notably, the 2% biochar application significantly increased the abundance of nitrification and denitrification genes, enhancing soil microorganism respiration.

However, biochar exhibited little influence on nitrogen cycle functional genes, indicating a nuanced relationship between biochar and specific soil processes. Soil moisture emerged as a crucial environmental factor, determining the abundance changes of carbon sequestration genes. Other factors influencing gene abundance included soil organic matter, pHpH is a measure of how acidic or alkaline a substance is. A pH of 7 is neutral, while lower pH values indicate acidity and higher values indicate alkalinity. Biochars are normally alkaline and can influence soil pH, often increasing it, which can be beneficial More, nitrate nitrogen, and ammonium nitrogen.

This research sheds light on the internal mechanisms of soil carbon and nitrogen cycles in frozen soil areas, offering valuable insights for the judicious use of biochar and efficient water and soil resource management in these regions. Understanding these relationships is crucial for sustainable agricultural practices and environmental stewardship in areas affected by freeze-thaw cycles.