|
|
Registro completo
|
Biblioteca (s) : |
INIA Treinta y Tres. |
Fecha : |
21/02/2014 |
Actualizado : |
11/10/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
PÉREZ DE VIDA, F.; LACA, E.A.; MACKILL, D.J.; FERNÁNDEZ, G.; FISCHER, A.J. |
Afiliación : |
FERNANDO BLAS PEREZ DE VIDA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Relating rice traits to weed competitiveness an yield: a path analysis. |
Fecha de publicación : |
2006 |
Fuente / Imprenta : |
Weed Science, 2006, v.54, p. 1122-1131 |
DOI : |
10.1614/WS-06-042R.1 |
Idioma : |
Inglés |
Notas : |
Article history: Received March 6, 2006 // approved August 10, 2006. Published Dec. 2006.
DOI: https://doi.org/10.1614/WS-06-042R.1 |
Contenido : |
Abstract:
Resistance to herbicides in the most important weeds threatens the sustainability of California rice. Weed-competitive rice cultivars could be a low-cost and safe nonchemical addition to an integrated weed management program. Trade-offs between competitiveness and productivity and inconsistent trait expression under weedy and weed-free conditions could complicate the breeding of competitive rice cultivars. A 2-year competition experiment was conducted in the greenhouse involving eight rice cultivars and two weed competition regimes (presence or absence of late watergrass) to examine the effects of rice weed-suppressive ability and tolerance to weed competition (weed tolerance) on rice yield. Competition reduced average rice yield from 32 to 48%, and watergrass biomass from 44 to 77%. Path analysis suggested that enhancing rice weed-suppressive ability and weed tolerance while minimizing possible productivity trade-offs should promote early (12 d after seeding) growth and light-capture traits followed by moderate growth rates before heading and a vigorous grain filling period. Crop growth rate (CGR) after heading was a relevant determinant of yield (direct path: 0.82, P < 0.01) and correlated (r = 0.30, P < 0.01) with weed tolerance. Late biomass accumulation was negatively correlated with harvest index and CGR during ripening (r = ?0.46, P < 0.01); thus, late-season competitiveness can lower productivity. Rice traits conferring competitiveness were correlated across weed competition regimes (r = 0.36–0.81, P < 0.01). However, significant cultivar-by-competition and cultivar-by-year interactions suggest that selection efficiency would be greater when traits are identified under competition and in different environments. This study relates to the phenotypic expression of traits for competitiveness. Breeding competitive cultivars will require additional knowledge on trait heritability, genetic correlations with competitiveness, and on the effects of the environment upon gene expression. MenosAbstract:
Resistance to herbicides in the most important weeds threatens the sustainability of California rice. Weed-competitive rice cultivars could be a low-cost and safe nonchemical addition to an integrated weed management program. Trade-offs between competitiveness and productivity and inconsistent trait expression under weedy and weed-free conditions could complicate the breeding of competitive rice cultivars. A 2-year competition experiment was conducted in the greenhouse involving eight rice cultivars and two weed competition regimes (presence or absence of late watergrass) to examine the effects of rice weed-suppressive ability and tolerance to weed competition (weed tolerance) on rice yield. Competition reduced average rice yield from 32 to 48%, and watergrass biomass from 44 to 77%. Path analysis suggested that enhancing rice weed-suppressive ability and weed tolerance while minimizing possible productivity trade-offs should promote early (12 d after seeding) growth and light-capture traits followed by moderate growth rates before heading and a vigorous grain filling period. Crop growth rate (CGR) after heading was a relevant determinant of yield (direct path: 0.82, P < 0.01) and correlated (r = 0.30, P < 0.01) with weed tolerance. Late biomass accumulation was negatively correlated with harvest index and CGR during ripening (r = ?0.46, P < 0.01); thus, late-season competitiveness can lower productivity. Rice traits conferring competitiveness were correlated acros... Presentar Todo |
Thesagro : |
ARROZ; CULTIVOS; ECHINOCHLOA PHYLLOPOGON; ESCARDA; MALEZAS. |
Asunto categoría : |
H60 Malezas y escardas |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/5240/1/Perez-arb-2006-1.pdf
|
Marc : |
LEADER 02811naa a2200253 a 4500 001 1032834 005 2019-10-11 008 2006 bl uuuu u00u1 u #d 024 7 $a10.1614/WS-06-042R.1$2DOI 100 1 $aPÉREZ DE VIDA, F. 245 $aRelating rice traits to weed competitiveness an yield$ba path analysis. 260 $c2006 500 $aArticle history: Received March 6, 2006 // approved August 10, 2006. Published Dec. 2006. DOI: https://doi.org/10.1614/WS-06-042R.1 520 $aAbstract: Resistance to herbicides in the most important weeds threatens the sustainability of California rice. Weed-competitive rice cultivars could be a low-cost and safe nonchemical addition to an integrated weed management program. Trade-offs between competitiveness and productivity and inconsistent trait expression under weedy and weed-free conditions could complicate the breeding of competitive rice cultivars. A 2-year competition experiment was conducted in the greenhouse involving eight rice cultivars and two weed competition regimes (presence or absence of late watergrass) to examine the effects of rice weed-suppressive ability and tolerance to weed competition (weed tolerance) on rice yield. Competition reduced average rice yield from 32 to 48%, and watergrass biomass from 44 to 77%. Path analysis suggested that enhancing rice weed-suppressive ability and weed tolerance while minimizing possible productivity trade-offs should promote early (12 d after seeding) growth and light-capture traits followed by moderate growth rates before heading and a vigorous grain filling period. Crop growth rate (CGR) after heading was a relevant determinant of yield (direct path: 0.82, P < 0.01) and correlated (r = 0.30, P < 0.01) with weed tolerance. Late biomass accumulation was negatively correlated with harvest index and CGR during ripening (r = ?0.46, P < 0.01); thus, late-season competitiveness can lower productivity. Rice traits conferring competitiveness were correlated across weed competition regimes (r = 0.36–0.81, P < 0.01). However, significant cultivar-by-competition and cultivar-by-year interactions suggest that selection efficiency would be greater when traits are identified under competition and in different environments. This study relates to the phenotypic expression of traits for competitiveness. Breeding competitive cultivars will require additional knowledge on trait heritability, genetic correlations with competitiveness, and on the effects of the environment upon gene expression. 650 $aARROZ 650 $aCULTIVOS 650 $aECHINOCHLOA PHYLLOPOGON 650 $aESCARDA 650 $aMALEZAS 700 1 $aLACA, E.A. 700 1 $aMACKILL, D.J. 700 1 $aFERNÁNDEZ, G. 700 1 $aFISCHER, A.J. 773 $tWeed Science, 2006$gv.54, p. 1122-1131
Descargar
Esconder MarcPresentar Marc Completo |
Registro original : |
INIA Treinta y Tres (TT) |
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
|
| Acceso al texto completo restringido a Biblioteca INIA Las Brujas. Por información adicional contacte bibliolb@inia.org.uy. |
Registro completo
|
Biblioteca (s) : |
INIA Las Brujas. |
Fecha actual : |
15/06/2022 |
Actualizado : |
15/06/2022 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
Internacional - -- |
Autor : |
GONZÁLEZ, A.; HERNÁNDEZ, J.; DEL PINO, A.; HIRIGOYEN, A. |
Afiliación : |
ALEJANDRO GONZÁLEZ, University of the Republic, College of Agronomy, Soil and Water Department, Montevideo, Uruguay; JORGE HERNÁNDEZ, University of the Republic, College of Agronomy, Soil and Water Department, Montevideo, Uruguay; AMABELIA DEL PINO, University of the Republic, College of Agronomy, Soil and Water Department, Montevideo, Uruguay; ANDRES EDUARDO HIRIGOYEN DOMINGUEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Nutrient use efficiency in commercial eucalypt plantations in different soils under temperate climate. |
Fecha de publicación : |
2022 |
Fuente / Imprenta : |
Southern Forests: a Journal of Forest Science, 2022. [Article in Press]. doi: https://doi.org/10.2989/20702620.2022.2066488 |
ISSN : |
2070-2620 |
DOI : |
10.2989/20702620.2022.2066488 |
Idioma : |
Inglés |
Notas : |
Article history: Published online 31 May 2022.
Corresponding author: González, A.; University of the Republic, College of Agronomy, Soil and Water Department, Montevideo, Uruguay; email:alejandrogonzalezuruguay@gmail.com |
Contenido : |
ABSTRACT - The sustainability of forest production is based on an adequate balance between soil nutrient supply and its demand by forest plantations, which may vary depending on the species and the site. In Uruguay, the low to medium fertility of the soils under forest production makes this aspect relevant. The objectives of the study were: (a) to quantify the concentration and distribution of nutrients in the harvested biomass of Eucalyptus dunnii, Eucalyptus grandis and Eucalyptus globulus in the predominant soils of the zones of greater forestry aptitude of Uruguay; and (b) to compare the nutrient use efficiencies of the three mentioned species in different soil types, as a criterion to evaluate the sustainability of the productive system in the long term. In 29 sites located in the three main forest areas of the country, nine trees with average diameter at breast height (DBH) and height were harvested at eight to eleven years of age. The aerial biomass and nutrient uptake (nitrogen, phosphorus, potassium, calcium and magnesium) in commercial wood, bark, leaves and branches were quantified, and two nutrient use efficiency indexes (nutrient use efficiency and biological utilisation coefficient) were calculated. Although the zones offered different conditions for growth and nutrient uptake, E. dunnii presented the highest extraction of nutrients in commercial wood, considering all sites, these indexes being lower for E. dunnii. Therefore, when planting E. dunnii, its greater use of the soil?s resources must be considered, particularly in soils that are naturally less fertile. Likewise, E. grandis presented a greater extraction of cations than E. globulus because of more extensive growth. © 2022 NISC (Pty) Ltd. MenosABSTRACT - The sustainability of forest production is based on an adequate balance between soil nutrient supply and its demand by forest plantations, which may vary depending on the species and the site. In Uruguay, the low to medium fertility of the soils under forest production makes this aspect relevant. The objectives of the study were: (a) to quantify the concentration and distribution of nutrients in the harvested biomass of Eucalyptus dunnii, Eucalyptus grandis and Eucalyptus globulus in the predominant soils of the zones of greater forestry aptitude of Uruguay; and (b) to compare the nutrient use efficiencies of the three mentioned species in different soil types, as a criterion to evaluate the sustainability of the productive system in the long term. In 29 sites located in the three main forest areas of the country, nine trees with average diameter at breast height (DBH) and height were harvested at eight to eleven years of age. The aerial biomass and nutrient uptake (nitrogen, phosphorus, potassium, calcium and magnesium) in commercial wood, bark, leaves and branches were quantified, and two nutrient use efficiency indexes (nutrient use efficiency and biological utilisation coefficient) were calculated. Although the zones offered different conditions for growth and nutrient uptake, E. dunnii presented the highest extraction of nutrients in commercial wood, considering all sites, these indexes being lower for E. dunnii. Therefore, when planting E. dunnii, its greate... Presentar Todo |
Palabras claves : |
Nutrient export; Soil resource; System sustainability. |
Asunto categoría : |
K01 Ciencias forestales - Aspectos generales |
Marc : |
LEADER 02719naa a2200229 a 4500 001 1063308 005 2022-06-15 008 2022 bl uuuu u00u1 u #d 022 $a2070-2620 024 7 $a10.2989/20702620.2022.2066488$2DOI 100 1 $aGONZÁLEZ, A. 245 $aNutrient use efficiency in commercial eucalypt plantations in different soils under temperate climate.$h[electronic resource] 260 $c2022 500 $aArticle history: Published online 31 May 2022. Corresponding author: González, A.; University of the Republic, College of Agronomy, Soil and Water Department, Montevideo, Uruguay; email:alejandrogonzalezuruguay@gmail.com 520 $aABSTRACT - The sustainability of forest production is based on an adequate balance between soil nutrient supply and its demand by forest plantations, which may vary depending on the species and the site. In Uruguay, the low to medium fertility of the soils under forest production makes this aspect relevant. The objectives of the study were: (a) to quantify the concentration and distribution of nutrients in the harvested biomass of Eucalyptus dunnii, Eucalyptus grandis and Eucalyptus globulus in the predominant soils of the zones of greater forestry aptitude of Uruguay; and (b) to compare the nutrient use efficiencies of the three mentioned species in different soil types, as a criterion to evaluate the sustainability of the productive system in the long term. In 29 sites located in the three main forest areas of the country, nine trees with average diameter at breast height (DBH) and height were harvested at eight to eleven years of age. The aerial biomass and nutrient uptake (nitrogen, phosphorus, potassium, calcium and magnesium) in commercial wood, bark, leaves and branches were quantified, and two nutrient use efficiency indexes (nutrient use efficiency and biological utilisation coefficient) were calculated. Although the zones offered different conditions for growth and nutrient uptake, E. dunnii presented the highest extraction of nutrients in commercial wood, considering all sites, these indexes being lower for E. dunnii. Therefore, when planting E. dunnii, its greater use of the soil?s resources must be considered, particularly in soils that are naturally less fertile. Likewise, E. grandis presented a greater extraction of cations than E. globulus because of more extensive growth. © 2022 NISC (Pty) Ltd. 653 $aNutrient export 653 $aSoil resource 653 $aSystem sustainability 700 1 $aHERNÁNDEZ, J. 700 1 $aDEL PINO, A. 700 1 $aHIRIGOYEN, A. 773 $tSouthern Forests: a Journal of Forest Science, 2022. [Article in Press]. doi: https://doi.org/10.2989/20702620.2022.2066488
Descargar
Esconder MarcPresentar Marc Completo |
Registro original : |
INIA Las Brujas (LB) |
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
Expresión de búsqueda válido. Check! |
|
|