Ning, Jianfeng and Arai, Yuji and Shen, Jian and Wang, Ronghui and Ai, Shaoying (2021) Effects of Phosphorus on Nitrification Process in a Fertile Soil Amended with Urea. Agriculture, 11 (6). p. 523. ISSN 2077-0472
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Abstract
While the effects of carbon on soil nitrogen (N) cycle have been extensively studied, it is not clearly understood how co-existing macronutrients, such as phosphorus (P), affect the N cycle in agroecosystems. In this study, P amendment effects on nitrification in a fertile agricultural soil were investigated under a typical N-P amendment rate. In a laboratory incubation study, soils were amended with urea, monopotassium phosphate and a mixture of urea and monopotassium phosphate at the same rate. In soils that received no amendments (control), P only, urea only, and urea plus P amendment, nitrification occurred within the first five days, with an average net nitrification rate of 5.30, 5.77, 16.66 and 9.00 mg N kg−1d−1, respectively. Interestingly, nitrification in urea-treated soils was retarded by P addition where a N:P ratio seemed to be a key factor impeding nitrification. This was also supported by the response of ammonia-oxidizing bacteria (AOB), which was more sensitive to P addition than ammonia-oxidizing archaea (AOA). The outcome of this study showed that application of P fertilizer suppressed the nitrification process in urea amended soil, suggesting that a synergistic aspect of N and P nutrient management should be further explored to retard N losses from agricultural systems.
Item Type: | Article |
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Subjects: | Euro Archives > Agricultural and Food Science |
Depositing User: | Managing Editor |
Date Deposited: | 16 Jan 2023 06:13 |
Last Modified: | 07 Jun 2024 09:30 |
URI: | http://publish7promo.com/id/eprint/1082 |