Premium
Soil warming and liming impacts on the recovery of 15 N in an acidic soil under soybean cropping
Author(s) -
Ahmad Waqar,
Dijkstra Feike A.,
Dalal Ram C.,
Singh Balwant
Publication year - 2016
Publication title -
journal of plant nutrition and soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 1436-8730
DOI - 10.1002/jpln.201500378
Subject(s) - lime , agronomy , chemistry , leaching (pedology) , soil water , environmental science , soil science , biology , paleontology
Abstract Liming has important implications for N dynamics in acidic soils planted with legumes that are not fully understood. We used a 15 N tracer (K 15 NO 3 ) 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 15 N recovery in soybean, but had no effect on microbial recovery. Elevated temperature, increased total plant N, decreased 15 N 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.