Height-diameter relationships and stem volume equations in young and middle-aged forest stands of Ukraine
Height-diameter (h-d) relationships in forest stands are commonly used in various scientific and practical forestry applications. Accurate h-d models combined with tree stem volume equations are recognised to be effective in growing stock volume estimation. The purpose of the study was threefold: 1)...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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National University of Life and Environmental Sciences of Ukraine
2022-11-01
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| Series: | Ukrainian Journal of Forest and Wood Science |
| Subjects: | |
| Online Access: | https://forestscience.com.ua/journals/tom-13-4-2022/spivvidnoshyennya-mizh-visotami-i-diamyetrami-ta-rivnyannya-ob-yemu-stovburiv-dyeryev-u-molodnyakakh-i-syeryednovikovikh-lisovikh-nasadzhyennyakh-ukrayini |
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| author | V. Myroniuk V. Svynchuk A. Bilous S. Kashpor O. Lesnik |
| author_facet | V. Myroniuk V. Svynchuk A. Bilous S. Kashpor O. Lesnik |
| author_sort | V. Myroniuk |
| collection | DOAJ |
| description | Height-diameter (h-d) relationships in forest stands are commonly used in various scientific and practical forestry applications. Accurate h-d models combined with tree stem volume equations are recognised to be effective in growing stock volume estimation. The purpose of the study was threefold: 1) development of a set of mathematical models of the h-d relationship in young and middle-aged forest stands for ten forest-forming species in Ukraine; 2) modelling stem volume in above mentioned forest stands; 3) comparison of established mathematical models with corresponding ones for premature, mature, and overmature forest stands. The study was based on permanent and temporal sample plots data (about 600) established in forest stands during 1950s-2020s within the most forested regions of Ukraine (Polissia, Forest-Steppe, Carpathians). In total, about 10,000 sample trees were measured on the sample plots to accurately estimate their stem volume outside bark. The h-d models demonstrated very similar relationships between stem heights and diameters for most of our species except for spruce and fir in mountain Carpathian forests where the steeper h-d curves were obtained. The study revealed that birch and hornbeam tree stems had the lowest volumes among surveyed species. The results also indicated that tree species tend to have higher volumes (up to 7% for coniferous, and up 10% for aspen and birch forests) in young and middle-aged forest sands than in older ones. For the other species, a statistically significant difference between stem volumes of trees of different ages was not observed. The developed mathematical models can complement the corresponding models for older groups of forest stands since they revealed an important aspect of relationships between the key tree stem parameters. These models are also applicable for a more precise stem volume estimation during thinning operations in the young and middle-aged forests in Ukraine |
| first_indexed | 2024-03-07T23:01:43Z |
| format | Article |
| id | doaj.art-fcf2acdb059148eba1d25ff2c79c6418 |
| institution | Directory Open Access Journal |
| issn | 2664-4452 2664-4460 |
| language | English |
| last_indexed | 2024-04-24T23:39:40Z |
| publishDate | 2022-11-01 |
| publisher | National University of Life and Environmental Sciences of Ukraine |
| record_format | Article |
| series | Ukrainian Journal of Forest and Wood Science |
| spelling | doaj.art-fcf2acdb059148eba1d25ff2c79c64182024-03-15T13:54:10ZengNational University of Life and Environmental Sciences of UkraineUkrainian Journal of Forest and Wood Science2664-44522664-44602022-11-011347483https://doi.org/10.31548/forest.13(4).2022.74-83550Height-diameter relationships and stem volume equations in young and middle-aged forest stands of UkraineV. MyroniukV. SvynchukA. BilousS. KashporO. LesnikHeight-diameter (h-d) relationships in forest stands are commonly used in various scientific and practical forestry applications. Accurate h-d models combined with tree stem volume equations are recognised to be effective in growing stock volume estimation. The purpose of the study was threefold: 1) development of a set of mathematical models of the h-d relationship in young and middle-aged forest stands for ten forest-forming species in Ukraine; 2) modelling stem volume in above mentioned forest stands; 3) comparison of established mathematical models with corresponding ones for premature, mature, and overmature forest stands. The study was based on permanent and temporal sample plots data (about 600) established in forest stands during 1950s-2020s within the most forested regions of Ukraine (Polissia, Forest-Steppe, Carpathians). In total, about 10,000 sample trees were measured on the sample plots to accurately estimate their stem volume outside bark. The h-d models demonstrated very similar relationships between stem heights and diameters for most of our species except for spruce and fir in mountain Carpathian forests where the steeper h-d curves were obtained. The study revealed that birch and hornbeam tree stems had the lowest volumes among surveyed species. The results also indicated that tree species tend to have higher volumes (up to 7% for coniferous, and up 10% for aspen and birch forests) in young and middle-aged forest sands than in older ones. For the other species, a statistically significant difference between stem volumes of trees of different ages was not observed. The developed mathematical models can complement the corresponding models for older groups of forest stands since they revealed an important aspect of relationships between the key tree stem parameters. These models are also applicable for a more precise stem volume estimation during thinning operations in the young and middle-aged forests in Ukrainehttps://forestscience.com.ua/journals/tom-13-4-2022/spivvidnoshyennya-mizh-visotami-i-diamyetrami-ta-rivnyannya-ob-yemu-stovburiv-dyeryev-u-molodnyakakh-i-syeryednovikovikh-lisovikh-nasadzhyennyakh-ukrayiniheight curvevolume tablesheight classform factorforecasting |
| spellingShingle | V. Myroniuk V. Svynchuk A. Bilous S. Kashpor O. Lesnik Height-diameter relationships and stem volume equations in young and middle-aged forest stands of Ukraine Ukrainian Journal of Forest and Wood Science height curve volume tables height class form factor forecasting |
| title | Height-diameter relationships and stem volume equations in young and middle-aged forest stands of Ukraine |
| title_full | Height-diameter relationships and stem volume equations in young and middle-aged forest stands of Ukraine |
| title_fullStr | Height-diameter relationships and stem volume equations in young and middle-aged forest stands of Ukraine |
| title_full_unstemmed | Height-diameter relationships and stem volume equations in young and middle-aged forest stands of Ukraine |
| title_short | Height-diameter relationships and stem volume equations in young and middle-aged forest stands of Ukraine |
| title_sort | height diameter relationships and stem volume equations in young and middle aged forest stands of ukraine |
| topic | height curve volume tables height class form factor forecasting |
| url | https://forestscience.com.ua/journals/tom-13-4-2022/spivvidnoshyennya-mizh-visotami-i-diamyetrami-ta-rivnyannya-ob-yemu-stovburiv-dyeryev-u-molodnyakakh-i-syeryednovikovikh-lisovikh-nasadzhyennyakh-ukrayini |
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