Radiata pine response to tillage, fertilization, and weed control in Chile

Albaugh, Timothy J.; Rubilar, Rafael; Álvarez, José Sala; Allen, H. Lee

doi:10.4067/s0717-92002004000200002

Cited by 15 publications

(19 citation statements)

References 7 publications

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“…Trees with traditional fertilizer (Table 3) responded similarly to that reported for P. radiata in the same area of study (Valdivia) (Albaugh, Rubilar, Álvarez, & Allen, 2004;Gerding, Schlatter, & Barriga, 1986). However, some treatments with CRF showed higher performance and efficiency with small doses (Table 2) yielding performances similar to those obtained with traditional fertilizer applications.…”

Section: Fertilization Effectssupporting

confidence: 59%

“…However, these increases are lower than those observed by Albaugh et al (2004) at the third year in a site with young volcanic ash soil (Mesic Typic Haploxerand), which is more fertile than the one used for this study.…”

Section: Fertilization Effectscontrasting

confidence: 41%

“…Los árboles con fertilizante tradicional (Cuadro 3) respondieron en forma similar a lo reportado para P. radiata en la misma zona de estudio (Valdivia) (Albaugh, Rubilar, Álvarez, & Allen, 2004;Gerding, Schlatter, & Barriga, 1986). Sin embargo, algunos tratamientos con FLC permitieron mayor rendimiento y eficiencia con pequeñas dosis (Cuadro 2) alcanzando desempeños similares a los obtenidos con la aplicación del fertilizante tradicional.…”

Section: Fertilization Effectsunclassified

“…En cambio, estos crecimientos son menores a los observados por Albaugh et al (2004) al tercer año en un sitio con suelo de cenizas volcánicas jóvenes (Mesic Typic Haploxerand), el cual tiene mayor fertilidad que el de esta investigación.…”

Section: Fertilization Effectsunclassified

“…In terms of percentages, the differences in growth of the best treatments compared to the control were lower in the last two seasons. According to Albaugh et al (2004), this is a situation where growth gains are partially lost because the plantations growth curves, both fertilized and unfertilized, converge at a future point (Miller, 1981). Therefore, the growth gains from fertilization must be exploited before the growth of fertilized trees will decay to the unfertilized trees level.…”

Section: Fertilization Effectsmentioning

confidence: 99%

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FERTILIZANTES DE LIBERACIÓN CONTROLADA APLICADOS AL ESTABLECIMIENTO DE Pinus radiata D. DON EN CHILE

Reyes-Millalón¹,

Gerding²,

Thiers-Espinoza³

2012

Rev Cha Se Cie For y del Amb

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El uso de fertilizantes de liberación controlada (FLC) es incipiente y no se han publicado resultados de su uso en Chile. Se evaluó una aplicación de FLC al momento del establecimiento de Pinus radiata sobre un suelo ultisol en Valdivia, Chile. El estudio se realizó en tres sitios (año 2006) con variaciones del suelo donde se aplicaron seis tratamientos de FLC (10-20 g·planta-1), un fertilizante tradicional hidrosoluble y un testigo sin fertilizar. Los datos se analizaron en un diseño de bloques al azar. La evaluación (2006-2010) consideró la supervivencia, el crecimiento de los árboles y la cobertura de malezas. La supervivencia fue 84 a 96 %, sin diferencias entre tratamientos (P > 0.05). Los FLC produjeron respuestas superiores en crecimiento que el testigo y similares a las del fertilizante hidro- soluble. Los mayores rendimientos de los árboles al cuarto año se obtuvieron con FLC (+42 % factor de producción). Los FLC dieron mejor respuesta con dosis mayores o periodos de liberación más pro- longados. La respuesta fue diferente entre sitios, tanto por la estructura del suelo como por su oferta nutritiva. El crecimiento fue mermado con una cobertura de malezas mayor al 30 % en la plantación.

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Section: Fertilization Effectssupporting

confidence: 59%

Section: Fertilization Effectscontrasting

confidence: 41%

Section: Fertilization Effectsunclassified

Section: Fertilization Effectsmentioning

confidence: 99%

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FERTILIZANTES DE LIBERACIÓN CONTROLADA APLICADOS AL ESTABLECIMIENTO DE Pinus radiata D. DON EN CHILE

Reyes-Millalón¹,

Gerding²,

Thiers-Espinoza³

2012

Rev Cha Se Cie For y del Amb

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Root and stem partitioning of Pinus taeda

Albaugh

Allen

Kress

2005

Trees

Self Cite

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We measured root and stem mass at three sites (Piedmont (P), Coastal Plain (C), and Sandhills (S)) in the southeastern United States. Stand density, soil texture and drainage, genetic makeup and environmental conditions varied with site while differences in tree size at each site were induced with fertilizer additions. Across sites, root mass was about one half of stem mass when estimated on a per hectare basis. Stem mass per hectare explained 91% of the variation in root mass per hectare, while mean tree diameter at breast height (D), site, and site by measurement year were significant variables explaining an additional 6% of the variation in root mass per hectare. At the S site, the root:stem ratio decreased from 0.7 to 0.5 when mean tree D increased from 10 to 22 cm. At the P and C sites, where mean root:stem ratios were 0.40 and 0.47, respectively, no significant slope in the root:stem to mean tree D relationship was found over a more narrow range in mean tree D (12-15 and 12-18 cm, respectively). Roots were observed in the deepest layers measured (190, 190, and 290 cm for the P, C, and S sites, respectively); however, the asymptotically decreasing root mass per layer indicated the bulk of roots were measured. Root growth relative to stem growth would need to change with increased mean tree D to explain the results observed here. While these changes in growth rate among plant components may differ across sites, stem mass alone does a good job of estimating root mass across sites.

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