7 documents found, page 1 of 1

Associations between exposure to green spaces and the development of asthma and...

A exposição ao ambiente urbano tem sido associada ao desenvolvimento de asma e doença alérgica. No entanto, as associações encontradas ainda geram controvérsia, com alguns estudos a indicarem os espaços verdes como pro tetores no desenvolvimento das doenças alérgicas, enquanto outros apontam essas exposições como tendo um papel indutor na exacerbação da sintomatologia associada. O presente artigo pretende rever...

Irrigating Cork Oaks Trees – First Insights on Growth and Stripping

Cork oak (Quercus suber L.) trees have a high environmental value already well documented in the literature. Also, its socio-economical value is recognized due to their ability to produce cork, which is renewable every 9 years. However, high cork oak mortality rates are being observed since last decades in all Mediterranean basis. The lack of regeneration and well-structured forest stands with trees of differen...

Cork oak Transplant: A new reality?

Cork oak tree (Quercus suber L.), in Portugal, is considered the national tree and have special demands and legal protection when dealing with silviculture management (pruning, debarking, thinning). Being a species of slow growth, cork oak transplanting procedures can be a valuable asset either from the economic or ecological rationales to relocate trees, re-populate areas affected by high tree mortality, incre...

The effect of soil compaction at different depths on cork oak seedling growth

Soil compaction promoted either by inadequate management (pressure of livestock and machinery) or by soil natural conditions (podzolisation) can influence the growth of cork oak seedlings. We hypothesized that compaction could be related with the lack of natural regeneration and decline on cork oak stands. In this paper, we evaluated the response of cork oak seedlings growth in terms of area and biomass product...

Importance of automatic threshold for image segmentation for accurate measureme...

The fine roots are considered the key organs for plant survival, growth and productivity. Measurement of fine roots variables is easily and conveniently achieved by means of digital image. The descriptive variables like root area, surface, total length and diameter distribution may be obtained from the image. Analysis of digital image consists from several steps, each of them represents potential source of the ...

Cork oak transplant: A new reality? A Physiological Approach to maximize sucess...

Cork oak tree (Quercus suber L.), in Portugal, is considered the national tree and have special demands and legal protection when dealing with silviculture management (pruning, debarking, thinning). Being a species of slow growth, cork oak transplanting procedures can be a valuable asset either from the economic or ecological rationales to relocate trees, re-populate areas affected by high tree mortality, incre...

Afinal os antecedentes cirúrgicos são importantes: a propósito de um caso clínico