Effects of tillage activities on leaf area index in a Tectona grandis plantation in northern Costa Rica
Tectona grandis is one of the species most used in reforestation projects in Costa Rica, and it has been planted on sites with problems of soil compaction layers that delay plantation growth; for this reason it is necessary to develop activities that improve soil conditions and promote productivity....
| Glavni autori: | , , , , |
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| Format: | Online |
| Jezik: | spa |
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Instituto de Ecología, A.C.
2017
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| Online pristup: | https://myb.ojs.inecol.mx/index.php/myb/article/view/498 |
| _version_ | 1799769235348520960 |
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| author | Valverde, Juan Carlos Guevara-Bonilla, Mario Arias, Dagoberto Briceño, Elemer Esquivel, Edwin |
| author_facet | Valverde, Juan Carlos Guevara-Bonilla, Mario Arias, Dagoberto Briceño, Elemer Esquivel, Edwin |
| author_sort | Valverde, Juan Carlos |
| collection | MYB |
| description | Tectona grandis is one of the species most used in reforestation projects in Costa Rica, and it has been planted on sites with problems of soil compaction layers that delay plantation growth; for this reason it is necessary to develop activities that improve soil conditions and promote productivity. The present study evaluated the effects on diameter, total height and leaf area index (LAI) of eight tillage treatments (witness, witness with dolomite, tillage with one, three and five chisels both 25 cm and 40 cm deep in combination with dolomite) applied during 2013 in a T. grandis plantation. Results showed that three years after tillage no significant differences were found in diameter and tree height (in average 11,74 cm and 11,1 m respectively). Instead the LAI showed the formation of two groups of treatments, one formed by the witness and witness with dolomite and the other with the tillage treatments. The first group presented LAI less than 3,80 m2 m-2, with correlations of leaf area index-height below 15% and allometric models with high standard errors, this is due to the heterogeneity of the individuals caused by the stress generated by the conditions of soil compaction. On the other hand, individuals with soil tillage presented LAI superior to 4,5 m2 m-2, with correlations of LAI-height greater than 56% and allometric models with errors standard under 0,20; the increase is due to the recovery process of the individual growth caused by the improvement of soil properties. |
| format | Online |
| id | oai:oai.myb.ojs.inecol.mx:article-498 |
| institution | Madera y Bosques |
| language | spa |
| publishDate | 2017 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.myb.ojs.inecol.mx:article-4982022-12-09T08:29:19Z Effects of tillage activities on leaf area index in a Tectona grandis plantation in northern Costa Rica Efectos de las actividades de labranza en el índice de área foliar en una plantación de Tectona grandis en la zona norte de Costa Rica Valverde, Juan Carlos Guevara-Bonilla, Mario Arias, Dagoberto Briceño, Elemer Esquivel, Edwin suelo fotografía hemisférica labranza plantación forestal crecimiento de los árboles Tectona grandis is one of the species most used in reforestation projects in Costa Rica, and it has been planted on sites with problems of soil compaction layers that delay plantation growth; for this reason it is necessary to develop activities that improve soil conditions and promote productivity. The present study evaluated the effects on diameter, total height and leaf area index (LAI) of eight tillage treatments (witness, witness with dolomite, tillage with one, three and five chisels both 25 cm and 40 cm deep in combination with dolomite) applied during 2013 in a T. grandis plantation. Results showed that three years after tillage no significant differences were found in diameter and tree height (in average 11,74 cm and 11,1 m respectively). Instead the LAI showed the formation of two groups of treatments, one formed by the witness and witness with dolomite and the other with the tillage treatments. The first group presented LAI less than 3,80 m2 m-2, with correlations of leaf area index-height below 15% and allometric models with high standard errors, this is due to the heterogeneity of the individuals caused by the stress generated by the conditions of soil compaction. On the other hand, individuals with soil tillage presented LAI superior to 4,5 m2 m-2, with correlations of LAI-height greater than 56% and allometric models with errors standard under 0,20; the increase is due to the recovery process of the individual growth caused by the improvement of soil properties. Tectona grandis es una de las especies más utilizadas en los proyectos de reforestación en Costa Rica y ha sido plantada en sitios con problemas de capas adensadas en el perfil del suelo que retrasan el crecimiento de las plantaciones; por esta razón se hace necesario el desarrollo de actividades de labranza que mejoren las condiciones del suelo y favorezcan la productividad. En el presente estudio se evaluaron los efectos en el diámetro, altura total e índice de área foliar (IAF) de ocho tratamientos de labranza (testigo, testigo con dolomita, labrado con uno, tres y cinco cinceles tanto a 25 cm como a 40 cm de profundidad en combinación con dolomita) aplicados durante 2013 en una plantación de T. grandis. Tres años después de la labranza, no se encontraron diferencias significativas en el diámetro y en altura de los árboles (en promedio 11,74 cm y 11,1 m respectivamente). En cambio, el IAF mostró la formación de dos agrupaciones de tratamientos, una conformada por el testigo y testigo con dolomita y otra por individuos con suelo labrado. La primera agrupación presentó IAF menores a 3,80 m2 m-2, con correlaciones de IAF-altura inferiores a 15% y modelos alométricos con errores estándar altos; esto se debió a la heterogeneidad de los individuos causada por el estrés generado por las condiciones de compactación en el suelo. En contraste, los individuos con suelo labrado presentaron IAF superiores a 4,5 m2 m-2, con correlaciones de IAF-altura superiores a 56% y modelos alométricos con errores estándar menores a 0,20; el aumento se atribuye al proceso de reactivación del crecimiento de los individuos producto del mejoramiento en las propiedades del suelo. Instituto de Ecología, A.C. 2017-09-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares application/pdf text/html https://myb.ojs.inecol.mx/index.php/myb/article/view/498 10.21829/myb.2017.232498 Madera y Bosques; Vol. 23 No. 2 (2017): Verano; 7-19 Madera y Bosques; Vol. 23 Núm. 2 (2017): Verano; 7-19 2448-7597 1405-0471 spa https://myb.ojs.inecol.mx/index.php/myb/article/view/498/1655 https://myb.ojs.inecol.mx/index.php/myb/article/view/498/1656 Derechos de autor 2017 Madera y Bosques http://creativecommons.org/licenses/by-nc-sa/4.0 |
| spellingShingle | Valverde, Juan Carlos Guevara-Bonilla, Mario Arias, Dagoberto Briceño, Elemer Esquivel, Edwin Effects of tillage activities on leaf area index in a Tectona grandis plantation in northern Costa Rica |
| title | Effects of tillage activities on leaf area index in a Tectona grandis plantation in northern Costa Rica |
| title_full | Effects of tillage activities on leaf area index in a Tectona grandis plantation in northern Costa Rica |
| title_fullStr | Effects of tillage activities on leaf area index in a Tectona grandis plantation in northern Costa Rica |
| title_full_unstemmed | Effects of tillage activities on leaf area index in a Tectona grandis plantation in northern Costa Rica |
| title_short | Effects of tillage activities on leaf area index in a Tectona grandis plantation in northern Costa Rica |
| title_sort | effects of tillage activities on leaf area index in a tectona grandis plantation in northern costa rica |
| url | https://myb.ojs.inecol.mx/index.php/myb/article/view/498 |
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