Abstract: (105 Views)
Extended abstract:
Introduction and goal: The creation of sequence mosaics in the forest ecosystem, which begins with the regeneration of life in the canopy, has a significant role in the spatial structure of forest masses, and it can also provide the possibility of establishment of regeneration by changing the characteristics of the soil. . Of course, this relationship is two-way and awareness of it can be effective in better understanding of natural processes. Therefore, the general purpose of this research is to investigate and compare soil properties in the canopy and closed canopy of pure and mixed beech.
materials and methods: In order to investigate the chemical changes of the soil layers of the canopy in the pure and mixed masses of beech, 7 sample plots of 25 hectares (500 x 500 meters) inside the parcels 4, 5, 7, 15, 16, 17 and 18 of the series 1,sixty cleats, which are the same in terms of location, was chosen. After selecting sample pieces, 8 canopy and 8 closed crowns in pure and mixed beech masses were selected for soil sampling. Soil sampling was done from two depths of 0 to 10 and 10 to 20 cm using a metal cylinder (diameter 8 cm). Before taking the soil samples, the average depth of the organic layer was measured and litter was collected at the site of each sample on a surface measuring 20 x 20 cm. After transferring the soil to the laboratory, the chemical properties of the soil including acidity, organic carbon, nitrogen, absorbable phosphorus and absorbable potassium were measured.
findings: The results of this research showed that the soil properties including acidity, total nitrogen and absorbable potassium at each of the two depths in different positions of the canopy between the pure and mixed mass have significant differences, and the depth of the organic layer in the pure mass is significantly different in The openings of the canopy are less than those of the closed canopy, and among the investigated variables in the organic layer, none of the properties measured such as acidity, organic carbon, total nitrogen, phosphorus and potassium can be absorbed in different situations. The coverage was not significant.
Conclusion: Over time, canopy lighting creates significant changes in the light and microclimate conditions of the forest floor and changes the soil properties and the cycle of nutrients in the forest soil. The formation of canopy increases the complexity of the canopy and increases the diversity in the availability and cycle of the main nutrient elements of the soil such as nitrogen, phosphorus and potassium. These changes are very necessary for seed germination, survival and growth of forest floor plants.
Introduction and goal: The creation of sequence mosaics in the forest ecosystem, which begins with the regeneration of life in the canopy, has a significant role in the spatial structure of forest masses, and it can also provide the possibility of establishment of regeneration by changing the characteristics of the soil. . Of course, this relationship is two-way and awareness of it can be effective in better understanding of natural processes. Therefore, the general purpose of this research is to investigate and compare soil properties in the canopy and closed canopy of pure and mixed beech.
materials and methods: In order to investigate the chemical changes of the soil layers of the canopy in the pure and mixed masses of beech, 7 sample plots of 25 hectares (500 x 500 meters) inside the parcels 4, 5, 7, 15, 16, 17 and 18 of the series 1,sixty cleats, which are the same in terms of location, was chosen. After selecting sample pieces, 8 canopy and 8 closed crowns in pure and mixed beech masses were selected for soil sampling. Soil sampling was done from two depths of 0 to 10 and 10 to 20 cm using a metal cylinder (diameter 8 cm). Before taking the soil samples, the average depth of the organic layer was measured and litter was collected at the site of each sample on a surface measuring 20 x 20 cm. After transferring the soil to the laboratory, the chemical properties of the soil including acidity, organic carbon, nitrogen, absorbable phosphorus and absorbable potassium were measured.
findings: The results of this research showed that the soil properties including acidity, total nitrogen and absorbable potassium at each of the two depths in different positions of the canopy between the pure and mixed mass have significant differences, and the depth of the organic layer in the pure mass is significantly different in The openings of the canopy are less than those of the closed canopy, and among the investigated variables in the organic layer, none of the properties measured such as acidity, organic carbon, total nitrogen, phosphorus and potassium can be absorbed in different situations. The coverage was not significant.
Conclusion: Over time, canopy lighting creates significant changes in the light and microclimate conditions of the forest floor and changes the soil properties and the cycle of nutrients in the forest soil. The formation of canopy increases the complexity of the canopy and increases the diversity in the availability and cycle of the main nutrient elements of the soil such as nitrogen, phosphorus and potassium. These changes are very necessary for seed germination, survival and growth of forest floor plants.
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