Wood ash effects on nutrient dynamics and soil properties under Mediterranean climate |
| |
| Authors: | María X Gómez-Rey Manuel Madeira Jo?o Coutinho |
| |
| Institution: | 1. Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade T??cnica de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal
2. Dpto Biologia e Ambiente, Centro de Qu??mica, Universidade de Tr??s-os-Montes e Alto Douro, 5001-911, Vila Real, Portugal
|
| |
| Abstract: | Aims This study aims to evaluate the effects of wood ash application on nutrient dynamics and soil properties of an acidic forest soil (Arenosol). Methods Treatments were loose and pelleted ash application (11?Mg?ha?1), alone or together with N fertiliser, and control treatment in a lysimeter experiment. Nutrient leaching was followed during a 2-year period and soil chemical and biological properties were evaluated at the end of the experiment. Results Wood ash increased leaching of total N, NH 4 + -N, base cations and P, mainly during the first months, the effect being more pronounced for the loose formulation. At the end of the study period, a positive effect on soil nutrient availability and soil acidity reduction was seen. The application of loose and pelleted ash alone decreased N leaching and increased N microbial biomass at the end of the experiment. The C dynamics was weakly affected. Conclusion Wood ash can be used to improve nutrient availability and balance nutrient exported by tree harvesting in acid forest soils, the effects at short-term being stronger for loose than for pelleted ash. However, their application should be carried out when vegetation is established to minimise nutrient losses at short-term and reduce the potential risk for water bodies. In N-limited soils, wood ash should be applied with N fertilisers to counteract N immobilisation. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
