employee from 06.05.2003 to 14.04.2018
Ekaterinburg, Ekaterinburg, Russian Federation
The accuracy and efficiency of determining the volume of wood and bark content in the stems of Scots pine (Pinus sylvestris L.) determine the focus of the problem of predicting the dynamics of biomass and subsequent processing of small-sized wood. The biometric parameters of small trees (N = 400) aged 8–15 years were assessed, with 200 trunks selected in each growth variant – forest young growth and forest plantations. The volumes of stems and bark were calculated for three types of formulas: 1) sectional; 2) median section formula and 3) formula using the old species number and cross-sectional area at breast height. According to the nonparametric Sign test, the differences between the biometric parameters of stem volume and bark volume of P. sylvestris in each of the growth variants, calculated using the formulas of the first and second types, are statistically insignificant (Z = 0.205-1.430 at p = 0.153-0.758). The volumes of stems and bark calculated using the old species number, according to the Sign test (Z = 6.011-16.670 at p = 0.001), had a significant discrepancy with those determined using the sectional formula and the median section formula. In accordance with the calculated value of the true species number (λ0.1), the stems of pine trees in the forest young growth can be assessed as medium-full-boled - λ0.1 in the bark = 0.512-0.566 and λ0.1 without bark = 0.491-0.561, and the stems of trees in forest plantations as full-boled - λ0.1 in the bark = 0.816-0.919 and λ0.1 without bark = 0.707-0.778. The biometric parameters of tree stem volumes with and without bark, calculated using the second type formula with interpolation through D0.1H, are in good agreement with the parameters obtained using the first and second type formulas (Z = 0.104–1.812 at p = 0.100–0.916). It has been established that the bark content of trees in the forest young growth and forest plantations of P. sylvestris increases consistently with a decrease in the density of the forest stand - in very dense stands about 10%, in dense stands about 13%, in average density about 16% and in sparse stands - 19% or more. To conduct scientific research and practical forest inventory work both in the forest young growth and in forest plantations of P. sylvestris, which most closely correspond to the actual stock, it is necessary to recommend a formula of the second type, interpolated on a model tree taking into account the trunk diameter at one tenth of its height.
Scots pine, Pinus sylvestris L., forest young growth, forest crops, formulas for determining stem volume, bark
1. Soldatova D.N., Il'incev A.S. Rost i produktivnost' lesnyh kul'tur sosny S.V. Alekseeva na Evropeyskom Severe Rossii. IVUZ Lesnoy zhurnal. 2020; 1: 99-112. – Bibliogr.: s. 109-111 (22 nazv.). DOI: https://doi.org/10.37482/0536-1036-2020-1-99-112.
2. Dubenok N.N., Kuz'michev V.V., Lebedev A.V. Rost i produktivnost' sosnovo-lipovyh kul'tur v Lesnoy opytnoy dache Timiryazevskoy akademii. Lesohozyaystvennaya informaciya. 2021; 1: 40-48. – Bibliogr.: s. 46-47 (17 nazv.). DOI:https://doi.org/10.24419/LHI.2304-3083.2021.1.03.
3. Onuchin A.A., Petrenko A.E., Sobachkin D.S., Sobachkin R.S. Reakciya sosnovyh molodnyakov Krasnoyarskoy lesostepi na izrezhivanie i vnesenie azotnyh udobreniy. Sibirskiy lesnoy zhurnal. 2022; 3: 6-14. Bibliogr. S. 13-14 (22 nazv.). DOI:https://doi.org/10.15372/SJF20220301.
4. Trouillier M., van der Maten-Theunissen M., Scharnweber T., Wilmking M. A unifying concept for growth trends of trees and forests the "Potential natural forest" // Frontiers in Forests and Global Change 3. September 2020, 3, Article 581333: 12. DOI: https://doi.org/10.3389/ffgc.2020.581334.
5. Pristova T.A., Fedorkov A.L., Novakovskiy A B. Nazemnaya fitomassa drevostoya v eksperimental'nyh kul'turah sosny skruchennoy v Syktyvkarskom lesnichestve respubliki Komi. Izvestiya vuzov. Lesnoy zhurnal. 2023; 6: 31-43. Bibl. 41-43 (28 nazv.) DOI: https:// doi.org/10.37482/0536-1036-2023-6-31-43.
6. Pshenichnikova L.S., Onuchin A.A., Sobachkin R.S., Petrenko A.E. Osobennosti rosta sosnovyh kul'tur raznoy gustoty v usloviyah yuzhnoy taygi Sibiri. Sibirskiy lesnoy zhurnal. 2022; 3: 24-33. Bibliogr. S. 31-32 (23 nazv.). DOI:https://doi.org/10.15372/SJF20220303.
7. Astrat Z., Eid T., Gobbaken T., Negas M. Modelling and quantifying tree biometric prosperities of dry Afromontane forests of south-central Ethiopia. Trees. 2020; 34: 1411-1426. DOI: http://doi.org/10.1007/s00468-020-02012-8.
8. Sobachkin D.S., Sobachkin R.S., Petrenko A.E. Osobennosti rosta i produktivnosti sosnovyh molodnyakov, sformirovannyh iz derev'ev razlichnogo cenoticheskogo statusa. Sibirskiy lesnoy zhurnal. 2022; 3: S. 34-39. Bibliogr. S. 39 (8 nazv.). DOI:https://doi.org/10.15372/SJF20220304.
9. Plyuha N.I., Usol'cev V.A., Cepordey I.S. Modelirovanie doli kory v fitomasse vetvey sosny obyknovennoy v stepnoy zone. Vestnik PGTU. Seriya: Les. Ekologiya. Prirodopol'zovanie. 2024; 1(61): 44-54. Bibliogr. 49-51 (41 nazv.). DOI: https://doi.org/10.25686/2306-2827.2024.1.44.
10. Bol'shakov B.M., Andryushin M.I., Doronicheva E.V. Razvitie tehnologiy i mashin pri rubkah uhoda za lesom v Finlyandii i Shvecii. [Elektronnyy resurs] DOI:https://doi.org/10.24419//LHI.2304-3083.2019.2.11.
11. Hakimova F.H., Noskova O.A., Hakimov R.R., Fonarev I.I. Effektivnyy variant resursosberezheniya v sfere zagotovki drevesiny i pererabotki ee v cellyulozno-bumazhnoy promyshlennosti. Himiya rastitel'nogo syr'ya. 2024; 1: 320-328. Bibl. 327-328 (21 istoch.). DOI:https://doi.org/10.14258/jcprm.20240113014.
12. Fomin V., Mikhailovich A., Zalesov S., Terehov G. Development of ideas within the framework of the genetic approach to the classification of forest types // Baltic Forestry. 2021; 27(1): 466. DOI: http://doi.org/10.46490/BF466.
13. Metodika polevyh rabot po taksacii lesa na postoyannyh probnyh ploschadyah v ramkah realizacii innovacionnogo proekta gosudarstvennogo znacheniya «Uglerod v ekosistemah: monitoring». Konsorcium № 4. Versiya 1.0. M.: 2023; 32. Rezhim dostupa: ritm-c.ru›wp-content/uploads/2023/07/metodika-.
14. Usmanov R.R. Statisticheskaya obrabotka dannyh agronomicheskih issledovaniy v programme «STATISTICA» : ucheb.-metod. posobie ; RGAU-MSHA. Moskva, 2020; 177. Bibliogr.: 175-176 (17 nazv.). DOI: 10/34677/2020.004.
15. Ermakova M.V. Struktura podrosta sosny v razlichnyh ekotopah Srednego Urala. Izvestiya Sankt-Peterburgskoy lesotehnicheskoy akademii. 2021; 234: 53-64. Bibliogr. 60-62 (17 nazv.). DOI:https://doi.org/10.21266/2079-4304.2021.234.53-64.
16. Mihaylova M.I., Chernyshov M.P. Osobennosti stroeniya geograficheskih lesnyh kul'tur sosny obyknovennoy po diametru. Lesotehnicheskiy zhurnal. 2021; 1(41): 46-55. Bibliogr. 53-55 (18 nazv.). DOI: https//doi.org/10.34220/issn.2222-7962/2021.1/4.
17. Mostarin A., Barbeito I., Christer R., Nilsson U. Regeneration failure of Scots pine changes the species composition of young forests. Scandinavian Journal Of forest research. 2021;37(1):14-22. DOI: https://doi.org/https://doi.org/10.1080/02827581.2021.2005133.
18. Ermakova M.V. Formirovanie strukturno-funkcional'noy organizacii molodnyakov sosny obyknovennoy (Pinus sylvestris L.) smeshannogo estestvenno-iskusstvennogo proishozhdeniya v usloviyah sosnyakov yagodnikovogo i raznotravnogo Srednego Urala. Lesotehnicheskiy zhurnal. 2023; 2(50): 43-58. Biblogr.: 56-58 (21 nazv). DOI: https//doi.org/10/34220/issn.2222-7962/2023.2/3
19. Karaseva M.V., Muhortov D.I., Lezhnin K.T. Izmenchivost' pokazateley rosta semennogo potomstva sosny kedrovoy sibirskoy mestnoy reprodukcii v Mariyskom Zavolzh'e. Vestnik Povolzhskogo gosudarstvennogo tehnologicheskogo universiteta. Seriya «Les. Ekologiya. Prirodopol'zovanie». 2023; 1(57): 73-87. Bibliogr.: 83-84 (23 nazv.). DOI:https://doi.org/10.25686/2306-2827.2023.1.73
20. Chirkunova E.A., Bricin I.V. Effektivnost' iskusstvennogo vosstanovleniya sosnovyh lesov v Nizhegorodskoy oblasti. Vestnik Nizhegorodskoy gosudarstvennoy sel'skohozyaystvennoy akademii. 2022; 3(35): 69-82. Bibliogr. 76-81 (79 nazv.). Rezhim dostupa: https://elibrary.ru/item.asp?id=49562400
21. Ng'andwe Ph., Chungu D., Yambaymba A.M., Chilamambe A. Modeling the height-diameter relationship of planed Pinus Kesia in Zambia. Forest Ecology and Management. 2019; 447: 1-11. DOI: https://doi.org/10.1016/j.foreco.2019.05.051
22. Berbe I., Annighöfer P. Seedling growth and biomass production under different light availability levels and competition types. Forests. 2022; 12(10): 1376. DOI: https://doi.org/10/3390/f12101376
