Carbon mineralization potential and nutrient dynamics in soils under vegetation types and soil depths at Luot mountain

• DOI: 10.55250/jo.vnuf.9.2.2024.032-042
• Publication Date: 2024-11-12T03:57:39Z
• Authors: Nguyen Thi Bich P...; Nguyen Thi Bich Hoa; Tran Thi Hang; Bui Manh Hung; Pervez Khan
• Keywords: Soil carbon; Soil nutrients; Carbon fibers

Soil mineralization is a crucial soil process that improves physical properties, enhances carbon sequestration, and provides essential minerals available nutrients for plant growth. This study was conducted at five vegetation types depths Luot mountain area, located in VNUF campus, Hanoi city. Samples were incubated the dark 25°C measured intervals of 1, 2, 5, 10, 15, 25, 35, 40 days laboratory to determine C-CO2 respiration from soils. The showed CO2 emissions highest topsoils decreased with deeper depths. Mineralized Shrubs > Acacia + Native species (NS) Pinus NS Control. peaked early incubation period then stabilized 40-day period. Larger aggregates (≥ 5mm) significantly under most types, except Shrubs, where reduction minimal. Aggregate size ≥3mm increased post-incubation, notably species, smaller also increasing slightly. Organic matter content topsoil but post-incubation due microbial C mineralization. There an increase organic 10-20 cm 20-40 layers after incubation, especially Shrubs. Available nitrogen slightly soils types. Phosphorus peaking while potassium levels generally poor during incubation. found strongly associated porosity pH, suggesting higher optimal pH enhance mineralization, being nutrient cycles