Mineralization of organic nitrogen from farm manure applications
| Autor: | B. J. Chambers, F. A. Nicholson, John R. Williams, Anne Bhogal, David R. Chadwick, K. H. Chambers |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Chemistry Soil Science chemistry.chemical_element Soil classification 04 agricultural and veterinary sciences Mineralization (soil science) 010501 environmental sciences 01 natural sciences Pollution Manure Nitrogen chemistry.chemical_compound Agronomy Nitrate 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Ammonium Organic matter Leaching (agriculture) Agronomy and Crop Science 0105 earth and related environmental sciences |
| Zdroj: | Soil Use and Management. 32:32-43 |
| ISSN: | 0266-0032 |
| Popis: | This study aimed to quantify the amount of nitrogen (N) mineralized from the organic fraction of farm manures under field conditions. Nine different farm manures were stripped of their ammonium-N content prior to soil incorporation and establishment of ryegrass at two sites in England. Grass N uptake and nitrate-N leaching were measured for five consecutive seasons and compared with an untreated control, with the sum of N uptake + leaching (net of the control) used as an estimate of the amount of organic N mineralized from the applied manures. The amount mineralized was related to thermal time (cumulative day degrees above 5 °C – CDD), with two distinct phases – an initial phase up to 2300 CDD (c.18 months under UK climatic conditions) where mineralization proceeded at rates ranging between 0.005 and 0.027%mineralized/CDD and a slower phase at >2300 CDD, where rates were negligible at |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text