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EFECTO DE LA FERTILIZACIÓN NITROGENADA SOBRE RENDIMIENTO Y CALIDAD DE FRUTA EN FRAMBUESO (Rubus idaeus L.) BAJO DOS PROGRAMAS DE FERTIRRIGACIÓN R.C. Suelo Nutr. Veg.
Quezada,Celerino; Vidal,Iván; Lemus,Luis; Sánchez,Héctor.
El objetivo de este estudio fue evaluar el efecto de la fertilización nitrogenada en el rendimiento y calidad de frutos de frambuesas (Rubus idaeus L.) cv. Heritage . El experimento de campo se realizó durante la temporada 2002-2003 en un suelo franco limoso (Typic Melanoxerands), en un huerto de dos años regado por goteo. Se aplicaron tres dosis de nitrógeno en la forma de urea equivalentes a 25, 50 y 100 kg N ha-1 mediante dos frecuencias de fertirrigación : permanente (FP) y única (FU), además de un testigo sin aplicación. La FP fue aplicada durante toda la temporada en cada riego (43 parcialidades), y la FU se aplicó al inicio de la temporada en noviembre. La dosis de 100 kg ha-1 aplicada como FU resultó ser el mejor tratamiento tanto en rendimiento...
Tipo: Journal article Palavras-chave: Riego por goteo; Dosis de nitrógeno; Frambuesas.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912007000300001
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Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil Ciencia e Investigación Agraria
Celis,José E; Sandoval,Marco; Martínez,Bárbara; Quezada,Celerino.
J.E. Celis, M. Sandoval, B. Martínez, and C. Quezada. 2013. Effect of organic and mineral amendments upon soil respiration and microbial biomass in a saline-sodic soil. Cien. Inv. Agr. 40(3): 571-580. An understanding of soil carbon stocks and fluxes in saline-sodic soils is becoming critical in environmental management because salinity and sodicity are predicted to increase worldwide. The effects of amendment with sewage sludge (SW), mined gypsum (MG) and synthetic gypsum (SG) on the soil respiration rate and soil (S) microbial biomass (SMB) of a saline-sodic soil were assessed in vitro over 60 days under controlled conditions. The treatments were: T1 = S + MG (7 t ha-1); T2 = S + MG (7 t ha-1) + SW (90 t ha-1); T3 = S + SG (7 t ha-1); T4 = S + SG (7 t...
Tipo: Journal article Palavras-chave: Arid soil; Biological activity; Gypsum; Organic matter; Sewage sludge; Soil respiration.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300010
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Seedling vigor variation among 80 recombinant chromosome substitution lines (RCSL) of barley (Hordeum vulgare) Ciencia e Investigación Agraria
Inostroza,Luis; Quezada,Celerino; Inostroza,Wladimir; Matus,Iván; Tapia,Maritza; del Pozo,Alejandro.
The seedling vigor of 80 barley recombinant chromosome substitution lines (RCSLs) was measured for selecting high seedling vigor genotypes. The RCSLs were derived from a cross between H. vulgare subsp. spontaneum and H. vulgare subsp. vulgare 'Harrington'. The work was carried out under greenhouse conditions during the summer of 2008. The experimental design was an alpha lattice with 3 replicates. In each replicate, 40 plants were established, distributed in eight polyethylene pots containing sand as substrate, which were fertilized an irrigated. The emergence of seedlings, number of leaves and shoots, dry matter of leaves, shoots and roots and leaf area of fully expanded leaves were measured. In addition, growth indices were calculated: emergence rate,...
Tipo: Journal article Palavras-chave: Plant growth analysis; Relative growth rate; Net assimilation rate; Allometric coefficient.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100013
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Selection of rice genotypes (Oryza sativa) with high nitrogen agronomic efficiency in an Acuic Durixererts soil, central-southern Chile Ciencia e Investigación Agraria
Quezada,Celerino; Hernaíz,Santiago; Vidal,Iván; Alvarado,Roberto; Gallegos,Rubén; Yañez,Wilson.
C. Quezada, S. Hernaíz, I. Vidal, R. Alvarado, R. Gallegos, and W. Yañez. 2013. Selection of rice genotypes (Oryza sativa) with high nitrogen agronomic efficiency in an Acuic Durixererts soil, central-southern Chile. 40(2): 375-385. Nitrogen agronomic efficiency (NAE) is a key factor that has not been considered in rice breeding programs. The objective of this study was to evaluate nitrogen agronomic efficiency in twenty rice genotypes in an Acuic Durixererts soil (Quella Series) located in Chile's south central zone (36°04'S, 72° 0'W) over the 2008-09 growing season. The field experiment was carried out in a complete randomized split-plot block design with five N treatments of 0, 50, 100, 150 and 200 kg ha-1 and twenty genotype sub-treatments. The...
Tipo: Journal article Palavras-chave: Nitrogen agronomic efficiency; Nitrogen dose; Rice genotypes.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200012
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