Application methods influence biochar–fertilizer interactive effects on soil nitrogen dynamics

• DOI: 10.1002/saj2.20170
• Publication Date: 2020-10-07T05:01:38Z
• Authors: Xiuwen Li; Avishesh Neupane; Sutie Xu; Nourredine Abdoul...; Jennifer M. DeBruyn; Forbes Walker; Sindhu Jagadamma
• Keywords: 2. Zero hunger; 0401 agriculture, forestry, and fisheries; 04 agricultural and veterinary sciences; 6. Clean water

Abstract The potential nitrogen (N) losses from soils with fertilizer addition can be reduced when biochar is co‐applied, but this effect influenced by the methods of and application. In a 60‐d laboratory incubation experiment, we investigated how two application (surface placement soil incorporation) affected N transformation in under following treatments: control (soil no urea [C]), (150 mg g −1 [B]), [U]), combination B + U (75 each U). Our results showed that at Day 30, concentrations NH 4 –N NO 3 − remained significantly higher for were relatively similar to biochar‐included treatments, indicating presence slowed mineralization during period. concentration cumulative 2 O production treatment 60 d was around times incorporation compared surface treatment, indicative longer‐term regulatory method. Additionally, observed number amo A gene transcripts incorporated applied later stage incubation, nitrification activity. These suggest used as slow release source provide long‐term supply crops, while method could crops need low beginning growth require substantial amount it later. Surface co‐application also good strategy reduce slowing down ammonification, nitrification, emission, ammonia oxidizing bacteria