Benbi D K, Biswas C R, Kalkat J S. Nitrate distribution and accumulation in an Ustochrept soil profile in a long term fertilizer experiment[J]. Fertilizer Research, 1991, 28(2): 173-177
[6]
Linville K W, Smith G E. Nitrate content of soil cores from corn plots after repeated nitrogen fertilization[J]. Soil Science, 1971, 112(4): 249-255
Levallois P, Theriault M, Rouffignat J, et al. Groundwater contamination by nitrates associated with intensive potato culture in Quebec[J]. Science of the Total Environment, 1998, 217(1): 91-101
Stadler S, Talma A S, Tredoux G, et al. Identification of sources and infiltration regimes of nitrate in the semi-arid Kalahari: Regional differences and implications for groundwater management[J]. Water SA, 2012, 38(2): 213-224
[17]
Yuan L, Pang Z, Huang T. Integrated assessment on groundwater nitrate by unsaturated zone probing and aquifer sampling with environmental tracers[J]. Environmental Pollution, 2012, 171: 226-233
Graham R C, Hirmas D R, Wood Y A, et al. Large near-surface nitrate pools in soils capped by desert pavement in the Mojave Desert, California[J]. Geology, 2008, 36(3): 259-262
[21]
Fenn M E, Baron J S, Allen E B, et al. Ecological effects of nitrogen deposition in the western United States[J]. Bioscience, 2003, 53(4): 404-420
Jenkinson D S. An introduction to the global nitrogen cycle[J]. Soil Use and Management, 1990, 6(2): 56-61
[25]
Jabro J D, Lotse E G, Simmons K E, et al. A field study of macropore flow under saturated conditions using a bromide tracer[J]. Journal of Soil and Water Conservation, 1991, 46(5): 376-380
[26]
Kennedy A C, Papendick R I. Microbial characteristics of soil quality[J]. Journal of Soil and Water Conservation, 1995, 50(3): 243-248
[27]
Austin A T, Yahdjian L, Stark J M, et al. Water pulses and biogeochemical cycles in arid and semiarid ecosystems[J]. Oecologia, 2004, 141(2): 221-235
Young E O, Briggs R D. Shallow ground water nitrate-N and ammonium-N in cropland and riparian buffers[J]. Agriculture, Ecosystems & Environment, 2005, 109(3): 297-309
Sitaula B K, Bakken L R. Nitrous oxide release from spruce forest soil: Relationships with nitrification, methane uptake, temperature, moisture and fertilization[J]. Soil Biology and Biochemistry, 1993, 25(10): 1415-1421
Zebarth B J, Freyman S, Kowalenko C G. Influence of nitrogen fertilization on cabbage yield, head nitrogen content and extractable soil inorganic nitrogen at harvest[J]. Canadian Journal of Plant Science, 1991, 71(4): 1275-1280
[36]
Stark J M, Firestone M K. Mechanisms for soil moisture effects on activity of nitrifying bacteria[J]. Applied and Environmental Microbiology, 1995, 61(1): 218-221
