Ammonia‐oxidizing microorganisms and microbial respiration: Biochar ammonium/nitrate‐based fertilizer effects on soil nitrification and crop performance

• DOI: 10.1111/sum.70019
• Publication Date: 2025-01-27T09:45:12Z
• Authors: Yuxuan Li; Zeinab El‐Desouki; Muhammad Riaz; Ali M. Abd‐Elkader; Saba Babar; Xiangling Wang; JiYuan Wang; Xiaoyang Xia; Cuncang Jiang
• Keywords: Oxidizing agent; Soil respiration; Ammonium nitrate

Abstract Biochar and N fertilizers can significantly influence the abundance functionality of ammonia‐oxidizing microorganisms (AMO), which are critical for nitrogen cycling soil health. This study investigates synergistic effects combined application biochar (2% w/w) different fertilizers, that is ammonium chloride (NH 4 Cl), sodium nitrate (NaNO 3 ) NO at 200 mg kg −1 each, in affecting nitrification processes microbial activities later, these were correlated with growth Chinese cabbage under acidic conditions. Our results indicated Co‐application NH Cl reduced height biomass by 44.35% 38.52%, respectively. However, association enhanced activity ammonia monooxygenase (AMO) 47.87% comparison BCN1, was mainly because absorption plant leading to its increased biomass. Moreover, BCN3 treatment reshaped community composition relative abundances AOA‐ Nitrososphaera AOB‐ norank_d_Bacteria . At same time, decreased norank_d_Archaea Nitrosomonadaceae , negatively affected AMO activities. Consequently, conjunction could enhance activities, resultantly, provided more − ‐N uptake as opposed collaboration soil. In conclusions, improved than application. These highlight potential integrating into fertilization practices promote sustainable