Interaction effects of nitrogen and phosphorus fertilizer on nitrogen mineralization of wheat residues in a calcareous soil
AffiliationUniv Arizona, Honors Coll, Sch Plant Sci
Univ Arizona, Honors Coll, Adjunct Fac
MetadataShow full item record
PublisherTAYLOR & FRANCIS INC
CitationFarideh Akbari, Sina Fallah, Mehdi Dahmardeh & Mohammad Pessarakli (2019): Interaction effects of nitrogen and phosphorus fertilizer on nitrogen mineralization of wheat residues in a calcareous soil, Journal of Plant Nutrition, DOI: 10.1080/01904167.2019.1659328
JournalJOURNAL OF PLANT NUTRITION
Rights© 2019 Taylor & Francis Group, LLC
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractBecause of the high pH of the soil in semiarid regions, phosphorus adsorption is unfavorable. So, considerable amounts of phosphorus fertilizers are used annually, where this fertilizer may affect the plant residues' decomposition. To examine the interaction effects of nitrogen and phosphorus on nitrogen mineralization in calcareous soil, a factorial experiment was performed in a completely randomized design with three replications. The first factor consisted of various C:N ratios (20, 40, and 60 or three levels of nitrogen N-1:0, N-2:11, and N-3:43 kg N ha(-1), respectively) and the second factor consisted of various C:P ratios (87, 174, and 260 or three levels of phosphorus P-1:0, P-2:12, and P-3:45 kg P ha(-1), respectively), under incubation conditions. The results indicated that the cumulative mineral nitrogen content in all treatments, except for N1P2 and N1P3 treatments, started from a positive amount and remained positive until the end of the incubation period. The highest amount of cumulative mineral nitrogen among treatments was related to N3P1 treatment, while the lowest was associated with N2P3 treatment. Mineralization of nitrogen during 60 d of incubation was the dominant phenomenon, except for the N1P2 and N1P3 treatments which remained in the organic phase. The effect of phosphorus on the cumulative mineralization of nitrogen was significant. With increasing the amount of phosphorus, the total inorganic nitrogen diminished. Nitrogen release begins earlier with lower C:N ratios, and therefore the available nitrogen can be released more quickly to the plant. It is generally concluded that, in calcareous soil, the use of nitrogen fertilizer to adjust C:N ratio and to improve the mineralization of wheat residues will be a suitable option.
Note12 month embargo; published online: 13 Sep 2019
VersionFinal accepted manuscript