Exposition of cork oak roots to cryptogein reduced the infection by Phytophtora cinnamomi
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Soil Aeration and Tree Health: Correlating Soil Oxygen Measurements With the Decline of Established Oaks
Field measurements of oxygen concentration and oxygen diffusion rate (ODR) indicate that ODR is a more reliable indicator of problem sites. In a landscaped area where oak trees are declining, ODR in the upper part of the soil profile ranged between 0.1-0.2 μg O2cm/minute (where μg = micrograms, and O2 = oxygen) for weeks at a time. In laboratory experiments, we have found low oxygen levels to i...
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This study aims to evaluate the pollution by Heavy Metals (HMs) of the stone pine (Pinus pinea L.) and cork oak (Quercus suber L.) in dry- and wet- season, motivated by the road traffic, at the level of the forest of Hafir located in Tlemcen (Algeria). The distribution and the migration of 9 HMs in the green leave and needles and the litter (viz.dead leaves) were studied,...
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In drought temperate forest, seedling recruitment is highly dependent on seed burial by native animal dispersers. To prolong seed storage, animals often take measures to impede seed germination. Aiming to understand the strategic balance between the natural seed germination and the role played by animals in the constraint germination procedures, we investigated the stages on the germinated acor...
متن کاملSouth African Avocado Growers’ Association Yearbook 1990. 13:61-62 A PRELIMINARY REPORT The influence of N and Casources on pathogenicity of Phytophthora cinnamomi and of Ca-sources on resistance of avocado roots to infection by the fungus
Saprophytic growth of Phytophthora cinnamomi indicated that the pathogenicity was not enhanced by addition of Nor Ca-sources to the basal growth medium. Mycelium obtained from the N and Ca-enriched sources and used to inoculate blue lupin seedlings indicated that the pathogenicity of the fungus was reduced by the addition of either N or Ca to the fungus cultures. The detached root technique was...
متن کاملBiomass, Carbon and Nutrient Storage in a 30-Year-Old Chinese Cork Oak (Quercus Variabilis) Forest on the South Slope of the Qinling Mountains, China
Chinese cork oak (Quercus variabilis) forests are protected on a large-scale under the Natural Forest Protection (NFP) program in China to improve the ecological environment. However, information about carbon (C) storage to increase C sequestration and sustainable management is lacking. Biomass, C, nitrogen (N) and phosphorus (P) storage of trees, shrubs, herb, litter and soil (0–100 cm) were d...
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