Simulating soil nitrogen fate in irrigated crop production with manure applications.

Autor: Koehn AC; USDA-ARS, Northwest Irrigation and Soils Research Lab, 3793 N. 3600 E., Kimberly, ID 83341, United States of America., Bjorneberg DL; USDA-ARS, Northwest Irrigation and Soils Research Lab, 3793 N. 3600 E., Kimberly, ID 83341, United States of America. Electronic address: dave.bjorneberg@usda.gov., Malone RW; USDA-ARS National Laboratory for Agriculture and the Environment, Ames, IA 50011, United States of America., Leytem AB; USDA-ARS, Northwest Irrigation and Soils Research Lab, 3793 N. 3600 E., Kimberly, ID 83341, United States of America., Moore A; Oregon State University, Dept. of Crop and Soil Science, 3063 Ag & Life Sciences, Corvallis, OR 97331, United States of America., Ma L; USDA-ARS Rangeland Resources and Systems Research Unit, Fort Collins, CO 80526, United States of America., Bartling PNS; USDA-ARS Rangeland Resources and Systems Research Unit, Fort Collins, CO 80526, United States of America.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2021 Nov 01; Vol. 793, pp. 148510. Date of Electronic Publication: 2021 Jun 17.
DOI: 10.1016/j.scitotenv.2021.148510
Abstrakt: Dairy manure is commonly applied to irrigated agricultural crops in the Magic Valley Region of southern Idaho, which has reported to impact the quality of surface and ground water. In this study, we used the Root Zone Water Quality Model (RZWQM2) to provide information about the long-term implications of manure applications. RZWQM2 was first calibrated and validated using 4 years of data from a long-term study with annual and biennial manure application rates of 18 Mg ha -1 , 36 Mg ha -1 , and 52 Mg ha -1 , along with a control and conventional fertilizer treatment for crop yield, soil water and soil N. The 4-yr crop rotation was spring wheat (2013), potato (2014), spring barley (2015), and sugar beets (2016). RZWQM2 simulated soil water content, crop yield, total soil nitrogen, and soil nitrogen mineralization effectively as PBIAS and RRMSE for soil water content and crop yields were within the acceptable range (±25% for PBIAS and <1.0 for RRMSE). Nitrate in the soil profile was overestimated, however in the acceptable range for the validation treatments. The calibrated model was then run for 16 years by repeating the management practices of the 4-year scenarios (4 crop rotations) for all treatments and 24 years for the 52 T Annual treatment (6 crop rotations). The 16-year simulation results showed that nitrogen seepage from annual manure treatments (for example, 18 T Annual vs 18 T Biennial) was 2.0 to 2.3 times higher than the nitrogen seepage from the biennial manure treatments. Increasing manure applications from 18 T Annual to 52 T Annual increased N seepage an average of 3.2 times for the 16-year rotation. Nitrogen seepage increased dramatically in rotations 3 and 4 compared to rotations 1 and 2 in the sixteen-year simulation. The 24-year simulation results showed after manure had been applied annually for 16 years and then applications terminated, the amount of N seepage returned initial levels in 8 years. In conclusion, to maintain clean ground water, manure applications would be best applied biennially, and high applications should be discouraged.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021. Published by Elsevier B.V.)
Databáze: MEDLINE
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