A Study on the Characteristics of Nitrification and Denitrification of Three Small Watersheds During the Wet and Dry Seasons with Various Sources of Pollution: A Case Study of the Jinjing Basin

Agriculture, Journal Year: 2024, Volume and Issue: 14(12), P. 2330 - 2330

Published: Dec. 20, 2024

Nitrogen cycling in freshwater ecosystems is critical for maintaining water quality, and understanding the processes of nitrification denitrification essential effective nitrogen management, particularly areas with diverse pollution sources. This study investigated three tributaries Jinjing River—Tuojia (agricultural), (residential), Guanjia (woodland)—during both wet dry seasons. The potential rates (PNRs) (PDNRs) were measured across these sites. highest observed Tuojia during season, PNR reaching 39.7 μg·kg−1 h−1 PDNR 3.25 mg·kg−1·h−1, while considerably lower Guanjia. ammonia-oxidizing archaea (AOA) abundance was higher than bacteria (AOB) at all sites, exhibiting AOA (5.9 × 10⁷ copies·g−1) season. nitrate-nitrogen (NO₃−-N) content a key factor influencing denitrification, significantly correlated (r = 0.69; p < 0.05). These findings highlight spatial seasonal variability emphasize importance developing targeted management strategies regions mixed land uses

Language: Английский

Plastic film mulching with nitrogen application activates rhizosphere microbial nitrification and dissimilatory nitrate reduction in the Loess Plateau

Soil and Tillage Research, Journal Year: 2024, Volume and Issue: 248, P. 106423 - 106423

Published: Dec. 25, 2024

Language: Английский