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Estimating biomass of Poplar species (Populus nigra) cultivated in Qezel-Ozan watershed utilizing the allometric method
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Amin Khademi   , Morteza Madanipour Kermanshahi , Behrouz Kord |
| Islamic Azad Unive |
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Abstract: (33 Views) |
Poplars and their hybrids due to their fast growth, easy vegetative propagation, high potential for Change features and wide distribution in the Northern Hemisphere, and rapid biomass storage capacity are economically valuable. With the objective of estimating the biomass of Poplar species around the watershed of Qezel-Ozan River in Khalkhal, statistical surveying of Poplar stands was done in a transect manner. The quantitative characteristics of the diameter at the breast and the height of the tree trunks were collected. The amount of biomass storage was estimated by allometric method and using cut trees. 32 trees were selected from the gardens around each river and after measuring the diameter at the breast and the height of the trunk, three discs with a thickness of 10 cm were provided from the beginning, middle, and end of the trunk. According to the dry weight and volume of the discs and trunk of each tree, biomass was determined. The cross-evaluation of the estimated and actual values of the data showed that the amount of biomass estimation with the independent variable of trunk height has less error than the estimation with the breast at diameter independent variable. Although the coefficient of determination value of the cross-evaluation shows the estimated and actual values with the diameter equal to the breast at a diameter more than the height of the trunk, this variable has a large error and is not suitable for The amount of biomass in the investigated area. The results of the F test revealed that the average amount of trunk biomass reserves in the studied habitats have a significant difference in the two independent variables (breast at diameter and trunk height) and the results of Duncan's test demonstrated that the mean biomass of trunks in the 4 studied habitats are in three different groups in each independent variable (diameter and height of the trunk).
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Article number: 1 |
| Keywords: watershed of Qezel-Ozan River, khalkhal, allometric relationships, biomass. |
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Full-Text [PDF 755 kb]
(25 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2023/02/14 | Accepted: 2025/05/4 | Published: 2025/05/25
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