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Silviculture systems and its introduction
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FOREST ECOSYSTEMS – A RECAPITULATION
(^) Forest has a more equable microclimate (^) Extremes of temperature ( Soil/ Air ) lessened (^) Impact of precipitation on soil lessened (^) Higher Humidity / Lesser Wind Speed Light reaching the ground …. 1- 15 % only Canopy layers help recycling nutrients / humus Soil improves; Water retained; Better roots, More penetration; Weathering More nutrient availability
If forest ecosystems are not managed and treated with care, the disturbances caused by harvesting can be long lasting. The site will loose it’s productivity
Symptoms Soil compaction, reduction of root - able volume (^) Excessive dryness or wetness in upper horizons Erosion and loss of horizons Loss of humus, growth of weeds / fungi Situation can become irreversible If people remove litter and… The sites are grazed
TH
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Favored Regular Crops of One Species Gayer , 1880 -86-More flexible Silviculture More Irregular Forms of Forest Stands Belief being- Mixtures are Natural Advocates of Natural Approach require Silviculture based on Ecology of Indigenous Forest Emphasis on “Adjustment to” Natural Forms of Ecosystems Rather than Radical Changes
About adoption of a Silvicultural System Favoring - one / two / many species
(^) Management objectives (^) Ecological status of Site / Crop Biodiversity concerns (^) Local factors Limitations
To make a choice Between Pure and Regular Stands and Naturally Mixed Stands We need to consider, Pure Stands to be viable need (^) Totally adapted species Maintenance of soil fertility Disease resistance / response to treatment Species in almost Pure Stands Available in India