Aspergillus niger, Carbonate, Fungal weathering, Nitrogen supply, Available phosphorus, Karst soil
long-term biochar addition, 15N fertilizer, soil organic N fractions, SON mineralization
biochar addition, Soil Compaction, Soil moisture, Root growth, Grain yield
long-term biochar addition, 15N fertilizer, root growth, photosynthesis, rice yield
Biochar addition, Soil compaction, Soil moisture, Root growth, grain yield
Biochar addition, soil compaction, Root growth, soil properties, grain yield