Recovery of 15N-labelled fertilizer applied in autumn to winter wheat at four sites in eastern England
| Autor: | David S. Powlson, G. Pruden, P. B. S. Hart, D. S. Jenkinson |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
chemistry.chemical_classification
Soil classification Mineralization (soil science) engineering.material Agronomy chemistry Genetics engineering Environmental science Animal Science and Zoology Organic matter Poaceae Fertilizer Drainage Leaching (agriculture) Agronomy and Crop Science Nitrogen cycle |
| Zdroj: | The Journal of Agricultural Science. 107:611-620 |
| ISSN: | 1469-5146 0021-8596 |
| DOI: | 10.1017/s002185960006977x |
| Popis: | SUMMARYThe recovery of autumn-applied labelled fertilizer N in winter wheat and in the soil and roots was measured in five experiments on three soil types in eastern England. In four of the experiments, crop recoveries of fertilizer N ranged from 11 to 34 % in years when drainage during winter and early spring was close to, or less than, the long-term average of about 200 mm. Crop recovery was higher (42 %) at a site where the soil was heavier and winter drainage was less. Total recoveries (in crop and soil, 0–50 cm) ranged from 22 to 61 %. Fertilizer N was at least risk to leaching when there was a large soil moisture deficit at the time of application. There was a linear relationship between fertilizer N lost and drainage (but not rainfall) between the time of N application and the end of March of the following year. Autumn-applied fertilizer N increased grain yield slightly in two of the experiments and decreased it in a third. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|