Variation in whole-rotation yield among Eucalyptus genotypes in response to water and heat stresses: The TECHS project
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.foreco.2020.117953 http://hdl.handle.net/11449/198565 |
Resumo: | The TECHS project spanned a 3500 km gradient from the Amazon to Uruguay, examining the influence of stresses from temperature and water supply on clonal plantations of Eucalyptus, with and without rain reduction, and across a stocking gradient. The whole-rotation mean annual increment (MAI) showed a humped pattern in relation to temperature, rising from about 18 Mg ha−1 yr−1 of stemwood production when mean annual temperatures were near 16 °C, to 27 Mg ha−1 yr−1 at 20 °C, and then falling to less than 15 Mg ha−1 yr−1 above 24 °C. The age trend in growth showed a steeper initial rise in the warmer tropical sites (reaching a peak current annual increment, CAI, of 27 Mg ha−1 yr−1, at age 2–3 years), but the slower early growth in the cooler subtropical sites had a higher peak (CAI of 32 Mg ha−1 yr−1, at 4 years) and slower decline, giving 15% higher MAI for the cooler region. Whole-rotation MAI declined by about 2.2 Mg ha−1 yr−1 for each 1 °C increase in temperature (in the range between 19.5 and 23.5 °C), and MAI declined by 0.5 Mg ha−1 yr−1 for each 100 mm yr−1 decline in rain. The effect of reducing ambient rain was also a loss of 0.5 Mg ha−1 yr−1 for each 100 mm yr−1 reduction in rain, though the effect was small on low productivity sites (<0.1 Mg ha−1 yr−1 for sites with MAI of 10 Mg ha−1 yr−1), and large on high productivity sites (1.4 Mg ha−1 yr−1 for sites with MAI of 40 Mg ha−1 yr−1). In the stocking portion of the project, growth of individual trees decreased (and stand-level growth increased) with increases in stocking, and water deficits led to decline in both measures of growth. Under favorable environments for Eucalyptus, stem growth in intensively managed plantations is about five-times the rates reported for non-plantation forests. The higher growth in plantations declines under warmer and drier conditions, matching productivity of non-plantation forests below about 900 mm yr−1 rainfall and 26 °C annual average temperature. The potential productivity of forests depends more strongly on management systems (genetic selection, site preparation, fertilization, spacing, competition control and protection) than on environmental gradients. |
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Variation in whole-rotation yield among Eucalyptus genotypes in response to water and heat stresses: The TECHS projectThe TECHS project spanned a 3500 km gradient from the Amazon to Uruguay, examining the influence of stresses from temperature and water supply on clonal plantations of Eucalyptus, with and without rain reduction, and across a stocking gradient. The whole-rotation mean annual increment (MAI) showed a humped pattern in relation to temperature, rising from about 18 Mg ha−1 yr−1 of stemwood production when mean annual temperatures were near 16 °C, to 27 Mg ha−1 yr−1 at 20 °C, and then falling to less than 15 Mg ha−1 yr−1 above 24 °C. The age trend in growth showed a steeper initial rise in the warmer tropical sites (reaching a peak current annual increment, CAI, of 27 Mg ha−1 yr−1, at age 2–3 years), but the slower early growth in the cooler subtropical sites had a higher peak (CAI of 32 Mg ha−1 yr−1, at 4 years) and slower decline, giving 15% higher MAI for the cooler region. Whole-rotation MAI declined by about 2.2 Mg ha−1 yr−1 for each 1 °C increase in temperature (in the range between 19.5 and 23.5 °C), and MAI declined by 0.5 Mg ha−1 yr−1 for each 100 mm yr−1 decline in rain. The effect of reducing ambient rain was also a loss of 0.5 Mg ha−1 yr−1 for each 100 mm yr−1 reduction in rain, though the effect was small on low productivity sites (<0.1 Mg ha−1 yr−1 for sites with MAI of 10 Mg ha−1 yr−1), and large on high productivity sites (1.4 Mg ha−1 yr−1 for sites with MAI of 40 Mg ha−1 yr−1). In the stocking portion of the project, growth of individual trees decreased (and stand-level growth increased) with increases in stocking, and water deficits led to decline in both measures of growth. Under favorable environments for Eucalyptus, stem growth in intensively managed plantations is about five-times the rates reported for non-plantation forests. The higher growth in plantations declines under warmer and drier conditions, matching productivity of non-plantation forests below about 900 mm yr−1 rainfall and 26 °C annual average temperature. The potential productivity of forests depends more strongly on management systems (genetic selection, site preparation, fertilization, spacing, competition control and protection) than on environmental gradients.Colorado State UniversityNorth Carolina State UniversityUniversidade Federal de LavrasUniversidade Federal do Rio Grande do NorteU.S. Forest ServiceUniversidade de São PauloSchool of Forestry Northern Arizona UniversityDepartment of Forest Sciences University of Lavras (UFLA)Department of Forest Science São Paulo State University – UNESPForestry Science and Research Institute (IPEF)Department of Forest Science São Paulo State University – UNESPNorthern Arizona UniversityUniversidade Federal de Lavras (UFLA)Universidade Estadual Paulista (Unesp)Forestry Science and Research Institute (IPEF)Binkley, DanCampoe, Otavio C. [UNESP]Alvares, Clayton Alcarde [UNESP]Carneiro, Rafaela LorenzatoStape, Jose L. [UNESP]2020-12-12T01:16:20Z2020-12-12T01:16:20Z2020-04-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.foreco.2020.117953Forest Ecology and Management, v. 462.0378-1127http://hdl.handle.net/11449/19856510.1016/j.foreco.2020.1179532-s2.0-85080027887Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengForest Ecology and Managementinfo:eu-repo/semantics/openAccess2021-10-22T16:54:11Zoai:repositorio.unesp.br:11449/198565Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-22T16:54:11Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Variation in whole-rotation yield among Eucalyptus genotypes in response to water and heat stresses: The TECHS project |
title |
Variation in whole-rotation yield among Eucalyptus genotypes in response to water and heat stresses: The TECHS project |
spellingShingle |
Variation in whole-rotation yield among Eucalyptus genotypes in response to water and heat stresses: The TECHS project Binkley, Dan |
title_short |
Variation in whole-rotation yield among Eucalyptus genotypes in response to water and heat stresses: The TECHS project |
title_full |
Variation in whole-rotation yield among Eucalyptus genotypes in response to water and heat stresses: The TECHS project |
title_fullStr |
Variation in whole-rotation yield among Eucalyptus genotypes in response to water and heat stresses: The TECHS project |
title_full_unstemmed |
Variation in whole-rotation yield among Eucalyptus genotypes in response to water and heat stresses: The TECHS project |
title_sort |
Variation in whole-rotation yield among Eucalyptus genotypes in response to water and heat stresses: The TECHS project |
author |
Binkley, Dan |
author_facet |
Binkley, Dan Campoe, Otavio C. [UNESP] Alvares, Clayton Alcarde [UNESP] Carneiro, Rafaela Lorenzato Stape, Jose L. [UNESP] |
author_role |
author |
author2 |
Campoe, Otavio C. [UNESP] Alvares, Clayton Alcarde [UNESP] Carneiro, Rafaela Lorenzato Stape, Jose L. [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Northern Arizona University Universidade Federal de Lavras (UFLA) Universidade Estadual Paulista (Unesp) Forestry Science and Research Institute (IPEF) |
dc.contributor.author.fl_str_mv |
Binkley, Dan Campoe, Otavio C. [UNESP] Alvares, Clayton Alcarde [UNESP] Carneiro, Rafaela Lorenzato Stape, Jose L. [UNESP] |
description |
The TECHS project spanned a 3500 km gradient from the Amazon to Uruguay, examining the influence of stresses from temperature and water supply on clonal plantations of Eucalyptus, with and without rain reduction, and across a stocking gradient. The whole-rotation mean annual increment (MAI) showed a humped pattern in relation to temperature, rising from about 18 Mg ha−1 yr−1 of stemwood production when mean annual temperatures were near 16 °C, to 27 Mg ha−1 yr−1 at 20 °C, and then falling to less than 15 Mg ha−1 yr−1 above 24 °C. The age trend in growth showed a steeper initial rise in the warmer tropical sites (reaching a peak current annual increment, CAI, of 27 Mg ha−1 yr−1, at age 2–3 years), but the slower early growth in the cooler subtropical sites had a higher peak (CAI of 32 Mg ha−1 yr−1, at 4 years) and slower decline, giving 15% higher MAI for the cooler region. Whole-rotation MAI declined by about 2.2 Mg ha−1 yr−1 for each 1 °C increase in temperature (in the range between 19.5 and 23.5 °C), and MAI declined by 0.5 Mg ha−1 yr−1 for each 100 mm yr−1 decline in rain. The effect of reducing ambient rain was also a loss of 0.5 Mg ha−1 yr−1 for each 100 mm yr−1 reduction in rain, though the effect was small on low productivity sites (<0.1 Mg ha−1 yr−1 for sites with MAI of 10 Mg ha−1 yr−1), and large on high productivity sites (1.4 Mg ha−1 yr−1 for sites with MAI of 40 Mg ha−1 yr−1). In the stocking portion of the project, growth of individual trees decreased (and stand-level growth increased) with increases in stocking, and water deficits led to decline in both measures of growth. Under favorable environments for Eucalyptus, stem growth in intensively managed plantations is about five-times the rates reported for non-plantation forests. The higher growth in plantations declines under warmer and drier conditions, matching productivity of non-plantation forests below about 900 mm yr−1 rainfall and 26 °C annual average temperature. The potential productivity of forests depends more strongly on management systems (genetic selection, site preparation, fertilization, spacing, competition control and protection) than on environmental gradients. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T01:16:20Z 2020-12-12T01:16:20Z 2020-04-15 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.foreco.2020.117953 Forest Ecology and Management, v. 462. 0378-1127 http://hdl.handle.net/11449/198565 10.1016/j.foreco.2020.117953 2-s2.0-85080027887 |
url |
http://dx.doi.org/10.1016/j.foreco.2020.117953 http://hdl.handle.net/11449/198565 |
identifier_str_mv |
Forest Ecology and Management, v. 462. 0378-1127 10.1016/j.foreco.2020.117953 2-s2.0-85080027887 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Forest Ecology and Management |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1799964819269353472 |