| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 242.75 KB | Adobe PDF |
Orientador(es)
Resumo(s)
In this work, results of a soil management experiment carried out in a rainfed olive
orchard were presented. The treatments were: conventional tillage; herbicide
application (glyphosate, a non‐selective post‐emergence herbicide) in spring; and
sheep walking. The results showed better soil fertility parameters in the treatment
consisting of natural vegetation managed by grazing (sheep walking). However, this
treatment led to the worst results regarding tree nutritional status and olive yields.
After 10 years, the accumulated olive yields were 187.2, 142.9 and 89.5 kg tree‐1
respectively in herbicide, tillage and sheep walking treatments. When the differences
among the treatments became dramatically high, and no doubt remained about the
effect of the treatments, we decided to change the experimental design. The plot
previously grazed began to be managed with glyphosate and vice‐versa. The plot
managed by tillage was kept the same. After four years assessing the three nutritional
status and olive yields, it was found that the cumulated production (average 4 years)
was already slightly higher in the new plot managed with glyphosate (85.4 kg tree‐1),
followed by sheep walking (80.3 kg tree‐1) and tillage plot (71.0 kg tree‐1). The result
revealed that in rainfed orchards we could not be overly tolerant to herbaceous
vegetation since the excessive competition for water in the spring may reduce
productivity. Cover cropping is a sensitive strategy in these agroecosystems.
Descrição
Palavras-chave
Cover cropping
Contexto Educativo
Citação
Rodrigues, M.A.; Afonso, Sandra; Ferreira, Isabel Q.; Arrobas, Margarida (2016). Results from a long-term study on groundcover management in rainfed olive orchards. In I International Conference on Research for Sustainable Development in Mountain Regions. Bragança: Instituto Politécnico. ISBN 978‐972‐745‐214‐9
Editora
Instituto Politécnico de Bragança