| Autor: |
Anac, D., Martin-PrÉvel, P., De Giorgio, D., Convertini, G., Ferri, D., Giglio, L., La Cava, P. |
| Zdroj: |
Improved Crop Quality by Nutrient Management; 1999, p293-296, 4p |
| Abstrakt: |
This research was carried out at Foggia (southern Italy) on a silty-clay soil (Typic Chromoxererts) in an experimental field characterized by hot-arid summers, cold winters and scanty and sporadic rains.Roots distribution, agronomic parameters and nitrogen balance were recorded at harvest of broad beans after durum wheat in a two-year rotation. Four different tillage methods (A — traditional mouldboard ploughing; B — ripper subsoiling; C — skim ploughing; D — minimum tillage) and three N rates (0, 50, 100 kg N ha−1 only to wheat) were used. Nitrogen balance in selected "treatment" was done by comparing soil mineral nitrogen variations (N-NO3 + exchangeable N-NH4), in all experimental plots, with nitrogen distribution within broad bean plant organs. The findings show a strong interaction between tillage methods and N rates as affected by the modifications of water infiltration, temperature gradients, organic carbon turnover and soil nitrogen transport and transformations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
