Microbial Role in Straw Organic Matter Depolymerization to Dissolved Organic Nitrogen Under Nitrogen Fertilizer Reduction in Coastal Saline Paddy Soil.

ABSTRACT: This study examines the effects of reduced nitrogen (N) application on rice straw N depolymerization in coastal saline paddy soil to establish a scientific basis for optimizing N application strategies during straw incorporation in coastal paddy systems. A 360-day field straw bag burial experiment was conducted using four N application levels: N0 (control, without N fertilizer), N1 (225 kg N/ha), N2 (300 kg N/ha), and N3 (375 kg N/ha). The results indicated that applying 300 kg N/ha significantly (p < 0.05) increased dissolved organic N (DON) content, apr and chiA gene copies, and the activities of alkaline protease, chitinase, leucine aminopeptidase, and N-acetylglucosaminidase. In addition, the application of 300 kg N/ha enhanced the synergistic effects of alkaline p

SUBMITTER: Dai X 

PROVIDER: S-EPMC12566125 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature