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- Title
Soil warming and liming impacts on the recovery of <sup>15</sup>N in an acidic soil under soybean cropping.
- Authors
Ahmad, Waqar; Dijkstra, Feike A.; Dalal, Ram C.; Singh, Balwant
- Abstract
Liming has important implications for N dynamics in acidic soils planted with legumes that are not fully understood. We used a 15N tracer (K15NO3) to examine N dynamics in a Chromic Luvisol planted with soybean with and without lime in environmentally-controlled chambers set at 20°C and 30°C (full factorial design). Liming increased total N and 15N recovery in soybean, but had no effect on microbial recovery. Elevated temperature, increased total plant N, decreased 15N recovery in soybean and microbes, and increased loss of N through leaching. Our results show enhanced uptake of soil mineral N by soybean with liming, thereby reducing N loss from soil, while an increase in temperature from 20°C to 30°C may enhance N loss in these systems.
- Subjects
SOIL heating; NITROGEN in soils; ACID soils; SOYBEAN farming; LUVISOLS; LEACHING
- Publication
Journal of Plant Nutrition & Soil Science, 2016, Vol 179, Issue 2, p193
- ISSN
1436-8730
- Publication type
Article
- DOI
10.1002/jpln.201500378