Growth response of two genetic materials of Eucalyptus to different height and time of pruning
We conducted four experiments to evaluate the effects of different heights and times of pruning on the growth of Eucalyptus grandis and E. grandis x E. camaldulensis GC INTA 8 in Concordia (Entre Ríos, Argentina). During winter, two experiments were carried out on 20 months old stands and, during sp...
| Autores principales: | , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Ediciones INTA
2024
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/17666 https://doi.org/10.58149/75pe-rc25 |
| _version_ | 1855486007096377344 |
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| author | Garcia, Maria De Los Angeles Ramos, Sergio Orlando Alejandro, Jorge Daniel |
| author_browse | Alejandro, Jorge Daniel Garcia, Maria De Los Angeles Ramos, Sergio Orlando |
| author_facet | Garcia, Maria De Los Angeles Ramos, Sergio Orlando Alejandro, Jorge Daniel |
| author_sort | Garcia, Maria De Los Angeles |
| collection | INTA Digital |
| description | We conducted four experiments to evaluate the effects of different heights and times of pruning on the growth of Eucalyptus grandis and E. grandis x E. camaldulensis GC INTA 8 in Concordia (Entre Ríos, Argentina). During winter, two experiments were carried out on 20 months old stands and, during spring, two more experiments were carried out on 24 months old stands. Each experiment consisted of two treatments assigned under a completely randomized design with four replicates of 300 m2 plots: T1= pruning to 2.5 m; T2= pruning to 4.5 m. Diameter at breast height (DBH) and total height were measured before pruning and after 12 months to calculate height and DBH growth in the first year following pruning. We used GLM and GLMM to modeling growth. Then, we compared the mean values of height and DBH growth ofT1 with T2 using Fisher’s LSD test. Finally, we calculated the resulting remaining crown (RC) after pruning treatments. After winter pruning, we found no significant differences in the growth of the two genetic materials. On the contrary, after spring pruning, the DBH growth of E. grandis was significantly lower (p=0.001) in T2 (3.4 cm) than in T1 (3.9 cm), while the height growth of GC INTA 8 was significantly lower (p=0.011) in T2 (3.2 m) than in T1 (3.5 m). According to the results, winter pruning of Eucalyptus genetic materials does not affect their growth in the first year, regardless of the height of pruning. However, spring pruning can affect DBH or height growth, depending on the variety. The extremely dry conditions during the development of these experiments may have affected growth responses differently. Further studies should focus on growth responses to pruning under normal climate conditions and other factors that may also affect growth. |
| format | Artículo |
| id | INTA17666 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Ediciones INTA |
| publisherStr | Ediciones INTA |
| record_format | dspace |
| spelling | INTA176662024-05-08T14:32:19Z Growth response of two genetic materials of Eucalyptus to different height and time of pruning Garcia, Maria De Los Angeles Ramos, Sergio Orlando Alejandro, Jorge Daniel Eucalyptus Híbridos Sistemas Silviculturales Poda Hybrids Clones Silvicultural Systems Pruning We conducted four experiments to evaluate the effects of different heights and times of pruning on the growth of Eucalyptus grandis and E. grandis x E. camaldulensis GC INTA 8 in Concordia (Entre Ríos, Argentina). During winter, two experiments were carried out on 20 months old stands and, during spring, two more experiments were carried out on 24 months old stands. Each experiment consisted of two treatments assigned under a completely randomized design with four replicates of 300 m2 plots: T1= pruning to 2.5 m; T2= pruning to 4.5 m. Diameter at breast height (DBH) and total height were measured before pruning and after 12 months to calculate height and DBH growth in the first year following pruning. We used GLM and GLMM to modeling growth. Then, we compared the mean values of height and DBH growth ofT1 with T2 using Fisher’s LSD test. Finally, we calculated the resulting remaining crown (RC) after pruning treatments. After winter pruning, we found no significant differences in the growth of the two genetic materials. On the contrary, after spring pruning, the DBH growth of E. grandis was significantly lower (p=0.001) in T2 (3.4 cm) than in T1 (3.9 cm), while the height growth of GC INTA 8 was significantly lower (p=0.011) in T2 (3.2 m) than in T1 (3.5 m). According to the results, winter pruning of Eucalyptus genetic materials does not affect their growth in the first year, regardless of the height of pruning. However, spring pruning can affect DBH or height growth, depending on the variety. The extremely dry conditions during the development of these experiments may have affected growth responses differently. Further studies should focus on growth responses to pruning under normal climate conditions and other factors that may also affect growth. Se establecieron cuatro experimentos para evaluar el efecto de la época y la altura de poda sobre el crecimiento de Eucalyptus grandis y E. grandis x E. camaldulensis GC INTA 8 en Concordia (Entre Ríos, Argentina). En invierno se instalaron dos experimentos en rodales de 20 meses de edad, y en primavera se instalaron dos experimentos más en rodales de 24 meses. Con diseño completamente aleatorizado con 4 repeticiones se aplicaron dos tratamientos en parcelas de 300 m2: T1= poda a 2,5 m; T2= poda a 4,5 m. Se midió diámetro a la altura del pecho (DAP) y altura total antes de la poda y 12 meses después de su aplicación, y se calculó el crecimiento en DAP y altura y la copa remanente. Mediante MLG y MLGM y test LSD de Fisher se comparó el crecimiento en DAP y altura de T1 y T2 en cada experimento. No se encontraron diferencias significativas entre T1 y T2 después de la poda en invierno en ninguno de los dos materiales genéticos. En cambio, luego de la poda de primavera el crecimiento en DAP de E. grandis resultó significativamente menor (p=0,001) en T2 (3,4 cm) que en T1 (3,9 cm) y el crecimiento en altura de GC INTA 8 fue significativamente menor (p=0,011) en T2 (3,2 m) que en T1 (3,5 m). En conclusión, la poda en invierno no afecta el crecimiento de estos Eucalyptus, mientras que la poda en primavera puede afectar el crecimiento en DAP o altura según el material genético. Las condiciones de extrema sequía ocurridas durante el desarrollo de estos experimentos pudieron haber afectado las respuestas de estos materiales genéticos. Se requieren nuevos estudios para evaluar el efecto de las podas en condiciones climáticas normales y considerar otros factores que pueden también afectar el crecimiento. EEA Concordia Fil: Garcia, Maria De Los Angeles. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concordia; Argentina Fil: Ramos, Sergio Orlando. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concordia; Argentina Fil: Alejandro, Jorge Daniel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concordia; Argentina 2024-05-08T14:20:27Z 2024-05-08T14:20:27Z 2024-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/17666 1669-2314 0325-8718 https://doi.org/10.58149/75pe-rc25 eng info:eu-repograntAgreement/INTA/2019-PE-E1-I016-001, Desarrollo de una silvicultura sostenible de bosques implantados de alta productividad info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Ediciones INTA RIA 50 (1) : 14-20. (abril 2024) |
| spellingShingle | Eucalyptus Híbridos Sistemas Silviculturales Poda Hybrids Clones Silvicultural Systems Pruning Garcia, Maria De Los Angeles Ramos, Sergio Orlando Alejandro, Jorge Daniel Growth response of two genetic materials of Eucalyptus to different height and time of pruning |
| title | Growth response of two genetic materials of Eucalyptus to different height and time of pruning |
| title_full | Growth response of two genetic materials of Eucalyptus to different height and time of pruning |
| title_fullStr | Growth response of two genetic materials of Eucalyptus to different height and time of pruning |
| title_full_unstemmed | Growth response of two genetic materials of Eucalyptus to different height and time of pruning |
| title_short | Growth response of two genetic materials of Eucalyptus to different height and time of pruning |
| title_sort | growth response of two genetic materials of eucalyptus to different height and time of pruning |
| topic | Eucalyptus Híbridos Sistemas Silviculturales Poda Hybrids Clones Silvicultural Systems Pruning |
| url | http://hdl.handle.net/20.500.12123/17666 https://doi.org/10.58149/75pe-rc25 |
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