Nitrogen and phosphorus fertilizer use efficiency: the interactive effects of fertilization and liming

作者：Xing Yu, Claudia Keitel, Md. Rumainul Islam, Feike A. Dijkstra · 发表于：Geoderma · 年份：2025 · DOI：10.1016/j.geoderma.2025.117362 · 被引用次数：4 · 研究领域：Crop Yield and Soil Fertility、Phosphorus and nutrient management、Soil and Water Nutrient Dynamics

Nitrogen (N) and phosphorus (P) play important roles in increasing agricultural productivity. However, excessive use of N and P fertilization can result in low N and P fertilizer use efficiencies ( RE N and RE P ) and loss of N and P through gaseous emission and leaching, but which also depend on soil pH conditions. In a full factorial glasshouse experiment using pots with 2.5 kg soil and adding N (0 and 100 kg N ha −1 ), P (0 and 50 kg P ha −1 ) fertilizer and lime (0, 3.5, 14 t ha −1 , 100 % calcium carbonate equivalent) we investigated the main and interactive effects of our treatments on RE N and RE P in wheat ( Triticum aestivum ) grown in a P-poor soil. The RE N was close to zero without P fertilization regardless of liming, but increased to 46 % with P fertilization (averaged across liming treatment) because of strong P limitation. Likewise, N fertilization increased RE P from 6 % to 8 % averaged across the liming treatment. However, liming decreased RE N (only when P fertilizer was added), possibly because of enhanced net N mineralization in the soil making plants less dependent on N fertilizer with liming, and increased RE P , possibly because of reduced fertilizer P-immobilization in the soil with low pH. Overall, N and P fertilizer and lime addition changed RE N and RE P by changing wheat growth along with N and P uptake, thereby affecting soil available nutrients, nitrous oxide emissions and N and P loss through leaching. We highlight the importance of adjusting N...