Field-Scale Evaluation of Calcium Ammonium Nitrate, Urea, and Urea Treated with N-(N-Butyl) Thiophosphoric Triamide Applied to Grassland in Ireland
| Autor: | Diogenes L. Antille, Nyncke J. Hoekstra, S. T. J. Lalor |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
geography
geography.geographical_feature_category food and beverages Soil Science chemistry.chemical_element N-(n-butyl) thiophosphoric triamide engineering.material Nitrogen Grassland Calcium ammonium nitrate chemistry.chemical_compound chemistry Agronomy N application engineering Urea Fertilizer Overall performance Agronomy and Crop Science |
| Zdroj: | Communications in Soil Science and Plant Analysis. 46:1345-1361 |
| ISSN: | 1532-2416 0010-3624 |
| Popis: | This study investigated the effects of nitrogen (N) source, rate, and timing of application on dry-matter yield (DMY), N responses, N uptake and N-use efficiency (NUE) in a grass crop. The experiment used three fertilizer treatments: calcium ammonium nitrate (CAN), urea, and urea treated with N-(n-butyl) thiophosphoric triamide (NBTPT), applied at 0 (control), 25, 50, and 75 kg ha−1 of N over eighteen application timings. Results showed relatively lower agronomic performance of urea compared with CAN when applied in early spring. Urea reported lower N responses, lower relative DMY (90 percent), and relative N uptake (85 percent), which translated in lower NUE (0.45 kg kg−1) compared with CAN (0.70 kg kg−1). In spring fertilizer applications, urea and NBTPT showed DMY and NUE values comparable to those obtained with CAN. However, NBTPT enhanced overall performance of urea, which was shown with increasing temperatures toward summer or increasing N application rates. For summer applications, the efficiency o... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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