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| Ovalle,Carlos; del Pozo,Alejandro; Lavín,Arturo; Hirzel,Juan. |
| Con el objetivo de evaluar y seleccionar cubiertas vegetales como cultivos entre hileras, para mejorar el manejo del suelo en un viñedo (Vitis vinifera L.) cv. Cabernet Sauvignon, se evaluaron cinco cubiertas: a) testigo sin vegetación; b) testigo con vegetación espontánea; c) mezcla de leguminosas de cultivares precoces de trébol subterráneo (Trifolium subterraneum L.) con hualputra (Medicago polymorpha L.); d) mezcla de cultivares tardíos de trébol subterráneo con trébol balansa (T. michelianum Savi); e) mezcla de leguminosas tardías con ballica anual (Lolium rigidum Gaud .) El ensayo se realizó en el Centro Experimental Cauquenes del Instituto de Investigaciones Agropecuarias (INIA), durante dos temporadas, 2005-2006 y 2006-2007. El diseño experimental... |
| Tipo: Journal article |
Palavras-chave: Cubiertas vegetales. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072007000400006 |
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| Ovalle,Carlos; Ojeda,Felipe; Skewes,Oscar. |
| Uno de los principales problemas en el establecimiento de una plantación de tagasaste (Chamaecytisus proliferus ssp. palmensis) es el ataque que las plantas sufren por parte de los lagomorfos (liebres y conejos). La presente investigación tuvo por objetivo evaluar métodos sencillos y no contaminantes del medio ambiente, que eviten el daño causado por lagomorfos en el establecimiento de plantaciones de tagasaste. Se evaluaron métodos físicos y químicos. Los primeros fueron dos tipos de cilindros de mallas plásticas y un cerco eléctrico especialmente diseñado para el efecto; los segundos, fueron dos repelentes comerciales, Tetrametil tiuram disulfuro y Denatonium benzoato y timol, además de sangre de bovino tratada con anticoagulante. Los resultados... |
| Tipo: Journal article |
Palavras-chave: Liebres; Conejos; Protección vegetal; Daño por animales silvestres. |
| Ano: 2002 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072002000300005 |
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| del Pozo,Alejandro; Ovalle,Carlos. |
| The production and sustainability of non-irrigated pastures in the Mediterranean climate region of central Chile is currently limited by the low diversity of valuable species and cultivars of annual forage legumes, able to persist in zones with highly variable annual rainfall, and low fertility or poorly drained soils. In this work, DM production, seed yield, hardseededness and pasture persistence were evaluated for cultivars of yellow serradella (Ornithopus compressus L.) and biserrula (Biserrula pelecinus L.), in field experiments conducted in the subhumid portion of the Mediterranean climate region of Chile. Burr medic (Medicago polymorpha L.) and sub clover (Trifolium subterraneum L.) were used as a reference plants. A remarkable DM production and seed... |
| Tipo: Journal article |
Palavras-chave: Annual legumes; Hard-seed; Espinal; Plant density; Seed yield. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300006 |
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| Martinez G,Ingrid; Ovalle,Carlos; Del Pozo,Alejandro; Uribe,Hamil; Valderrama V,Natalia; Prat,Christian; Sandoval,Marco; Fernández,Fernando; Zagal,Erick. |
| Chilean dryland areas of the Mediterranean climate region are characterized by highly degraded and compacted soils, which require the use of conservation tillage systems to mitigate water erosion as well as to improve soil water storage. An oat (Avena sativa L. cv. Supernova-INIA) - wheat (Triticum aestivum L. cv. Pandora-INIA) crop rotation was established under the following conservation systems: no tillage (Nt), Nt + contour plowing (Nt+Cp), Nt + barrier hedge (Nt+Bh), and Nt + subsoiling (Nt+Sb), compared to conventional tillage (Ct) to evaluate their influence on soil water content (SWC) in the profile (10 to 110 cm depth), the soil compaction and their interaction with the crop yield. Experimental plots were established in 2007 and lasted 3 yr till... |
| Tipo: Journal article |
Palavras-chave: Neutron probe; Penetrometer resistance; Oat; Subsoiling; Water erosion; Wheat. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400018 |
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| Espinoza,Soledad; Ovalle,Carlos; del Pozo,Alejandro; Zagal,Erik; Urquiaga,Segundo. |
| Despite annual legume pasture are of great importance for dryland agricultural systems in Mediterranean environments, there are few studies of N2 biological fixation (NBF) reported in Chile. In this study the NBF of four annual legume species: subterranean clover (Trifolium subterraneum L.), yellow serradella (Ornithopus compressus L.), arrow-leaf clover (T. vesiculosum L.), and crimson clover (T. incarnatum L.) (Experiment 1), as well as seven mixtures of these species (Experiment 2) were assessed. The NBF was measured by the 15N natural abundance technique. The objective was to determine NBF in the legume species and in distinct mixtures used. The study was carried out in an Andisol of the Andean Precordillera located in the humid Mediterranean zone of... |
| Tipo: Journal article |
Palavras-chave: Natural abundance of 15N; Mediterranean pastures; Volcanic soil. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100016 |
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| Ovalle,Carlos; Espinoza,Soledad; Barahona,Viviana; Gerding,Macarena; Humphries,Alan; del Pozo,Alejandro. |
| In dryland Mediterranean environments, the productivity of annual legumes is low during autumn and winter, with plant senescence typically beginning by the middle of spring because of low soil water availability. Therefore, the use of deep-rooted perennial legumes may provide an alternative to annual legumes in regions with a soil moisture déficit. We evaluated the germplasm of new perennial legumes with deep rooting systems in two field experiments in the interior drylands of central Chile. In experiment 1, sixteen genotypes of four perennial legume species, nine cultivars (cvs.) of Medicago sativa, two of Hedysarum coronarium, three of Lotus tenuis, and two of Lotus corniculatus were evaluated for three seasons (2012-2014). In experiment 2, eight... |
| Tipo: Journal article |
Palavras-chave: Dryland lucerne; Perennial legumes; Mediterranean pastures. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000300014 |
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| Muñoz,Cristina; Ovalle,Carlos; Zagal,Erick. |
| The overexploitation of the natural resources in the Mediterranean-type climate region of Chile, has resulted in natural forest fragmentation and expansion of Acacia caven (Mol), forming the Espinal ecosystem (EE) that includes two million of hectares in the Central part of Chile. The effect of the anthropogenic intervention over the soil organic carbon (SOC) in these ecosystems is unknown. The aim of this study was to quantify the SOC stocks and it profile distribution in the EE. This was achieved by collecting soils samples according to soil coverage percentage canopy from: well-preserved Espinal (WPE), 51-80 %; good-preserved (GE), 26-50 %; degraded (DE), 11-25 % and very degraded (VDE), 0-10 %. We also included a native forest (NF), 80-98 % of soil... |
| Tipo: Journal article |
Palavras-chave: Acacia caven; Degraded ecosystems; Soil use intensity. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912007000100002 |
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