The food forest gardening approach is the creation of systems which are productive and abundant yet which require very little maintenance. It is entirely possible to design and plant a forest which, within a relatively short period of time is productive and relatively self-maintaining. By exploiting the premise of companion planting, trees, shrubs and herbs can be intermixed to grow on multiple levels in the same area, as do the plants in a forest. We can consciously apply the principles of ecology to the design of home scale gardens that mimic forest ecosystem structure and function, but at the same time grow food, fuel, fiber, fodder, fertilizer and medicine.
Tuesday, May 18, 2010
Fungi, and healing the earth.
The main aspect of fungi that we want to utilise in the garden, is the symbiotic relationship that plants have with fungi. Over 90% of all plant species engage in mycorrhizal relationships with fungi.
This relationship includes:
intra/extra-cellular nutrient exchange
nutrient exchange between different plants through the fungal network
mechanisms of increased nutrient absorption (chemical and physical)
increased disease and pest/herbivore resistance
improving soil structure
enhanced resistance to drought, environmental stress
breaking down lignin in dead organic matter to create humus
consuming carbohydrates and returning minerals and acids
Two major types of mycorrhiza occur in Nature - endomycorrhiza (common in more than 80 % of terrestrial plant species) and ectomycorrhiza (specific to conifers and some broadleaved woody species).
Endomycorrhizal fungi develop mainly microscopic spores in the soil whereas most of ectomycorrhizal fungal symbionts develop aboveground fruit bodies.
An endomycorrhizal fungus forms hyphae that penetrate the cells of plant roots where they form balloon-like vesicles and branch out manifold to develop big surface areas dedicated to the exchange of minerals and carbohydrates.
Ectomycorrhizal fungi form a symbiotic relationship with a plant forming a sheath around the root tip of the plant. Ectomycorrhizal relationships are common in our forests. Most trees will only form one type of mycorrhizal relationship with fungal partners.
Paul Stamets has been a dedicated mycologist for over thirty years. Over this time, he has discovered and coauthored four new species of mushrooms, and pioneered countless techniques in the field of edible and medicinal mushroom cultivation.
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