Perennial grasses of different successional stages under various soil water inputs: do they differ in root length density?
Information about root length density (RLD) on perennial grasses of different successional stages exposed to various soil water inputs is limited. The effects on RLD of different soil water inputs were evaluated in the late-seral Stipa clarazii Ball, the comparatively earlier-seral S. tenuis Phil, a...
| Main Authors: | , |
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| Format: | Artículo |
| Language: | Inglés |
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Asociación Interciencia, Venezuela
2022
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| Online Access: | http://hdl.handle.net/20.500.12123/13124 |
| _version_ | 1855485110251421696 |
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| author | Busso, Carlos Alberto Bolletta, Andrea Ivana |
| author_browse | Bolletta, Andrea Ivana Busso, Carlos Alberto |
| author_facet | Busso, Carlos Alberto Bolletta, Andrea Ivana |
| author_sort | Busso, Carlos Alberto |
| collection | INTA Digital |
| description | Information about root length density (RLD) on perennial grasses of different successional stages exposed to various soil water inputs is limited. The effects on RLD of different soil water inputs were evaluated in the late-seral Stipa clarazii Ball, the comparatively earlier-seral S. tenuis Phil, and the earlyseral S. gynerioides Phil. Field studies were conducted in 1996 and early 1997, although treatments were imposed since 1995. S. clarazii and S. tenuis are two important palatable perennial tussock grasses in temperate, semiarid rangelands of central Argentina, where S. gynerioides is one of the most abundant, unpalatable perennial grass species. It was hypothesized that 1) S. clarazii and S. tenuis have a lower RLD under irrigated than under rainfed or water stress conditions, 2) S. clarazii has a greater RLD than S. gynerioides and S. tenuis under all water inputs and sampling dates, and 3) the RLD of the three species will vary with sampling date, within each species and soil water level. Results led to reject hypothesis 1 and accept hypotheses 2 and 3. Maintenance of root growth under all water inputs would allow these species a greater soil exploration and resource finding to sustain regrowth in their native, semiarid environments. Also, the study demonstrated that late-seral perennial grasses (S. clarazii) should have a superior competitive ability than earlier seral grasses (S. tenuis and S. gynerioides) because of, at least in part, their greater average RLD under water stress, rainfed and irrigated conditions. |
| format | Artículo |
| id | INTA13124 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Asociación Interciencia, Venezuela |
| publisherStr | Asociación Interciencia, Venezuela |
| record_format | dspace |
| spelling | INTA131242022-10-14T14:44:08Z Perennial grasses of different successional stages under various soil water inputs: do they differ in root length density? Busso, Carlos Alberto Bolletta, Andrea Ivana Gramineas Plantas Perennes Agua del Suelo Etapas de Desarrollo de la Planta Grasses Perennials Soil Water Root Length Plant Developmental Stages Information about root length density (RLD) on perennial grasses of different successional stages exposed to various soil water inputs is limited. The effects on RLD of different soil water inputs were evaluated in the late-seral Stipa clarazii Ball, the comparatively earlier-seral S. tenuis Phil, and the earlyseral S. gynerioides Phil. Field studies were conducted in 1996 and early 1997, although treatments were imposed since 1995. S. clarazii and S. tenuis are two important palatable perennial tussock grasses in temperate, semiarid rangelands of central Argentina, where S. gynerioides is one of the most abundant, unpalatable perennial grass species. It was hypothesized that 1) S. clarazii and S. tenuis have a lower RLD under irrigated than under rainfed or water stress conditions, 2) S. clarazii has a greater RLD than S. gynerioides and S. tenuis under all water inputs and sampling dates, and 3) the RLD of the three species will vary with sampling date, within each species and soil water level. Results led to reject hypothesis 1 and accept hypotheses 2 and 3. Maintenance of root growth under all water inputs would allow these species a greater soil exploration and resource finding to sustain regrowth in their native, semiarid environments. Also, the study demonstrated that late-seral perennial grasses (S. clarazii) should have a superior competitive ability than earlier seral grasses (S. tenuis and S. gynerioides) because of, at least in part, their greater average RLD under water stress, rainfed and irrigated conditions. La información sobre densidad de longitud de raíces (DLR) es escasa en gramíneas perennes de diferentes estados sucesionales expuestas a varios niveles hídricos del suelo. Los efectos de distintos niveles hídricos sobre la DLR fueron evaluados en gramíneas perennes de etapas sucesionales tardías (Stipa clarazii Ball.), intermedias (S. tenuis Phil.), y tempranas (S. gynerioides Phil.). Se condujeron estudios de campo en 1996 y principios de 1997, aunque los tratamientos fueron impuestos desde 1995. S. clarazii y S. tenuis son importantes gramíneas perennes cespitosas palatables en pastizales templados semiáridos del centro de Argentina, donde S. gynerioides es una de las especies de gramíneas perennes no palatables más abundantes. Se probaron las siguientes hipótesis: 1) S. clarazii y S. tenuis tienen menor DLR bajo condiciones de riego que bajo condiciones naturales o estrés hídrico, 2) S. clarazii tiene mayor DLR que S. gynerioides y S. tenuis bajo todos los niveles hídricos y fechas de muestreo, y 3) la DLR de las tres especies varía con la fecha de muestreo, dentro de cada especie y nivel hídrico del suelo. Los resultados condujeron a rechazar la hipótesis 1 y aceptar las hipótesis 2 y 3. El mantenimiento del crecimiento radical en todos los niveles hídricos les permitiría a estas especies una mayor exploración del volumen del suelo y adquisición de recursos que mantengan el rebrote en sus ambientes nativos, semiáridos. El estudio también demostró que las gramíneas perennes de estados sucesionales tardíos (S. clarazii) deberían tener mayor capacidad competitiva que especies más tempranas en la sucesión vegetal (S. tenuis y S. gynerioides) debido, al menos en parte, a su mayor DLR promedio bajo condiciones de estrés hídrico, naturales y de riego. EEA Bordenave Fil: Busso, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina Fil: Busso, Carlos Alberto. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Fil: Busso, Carlos Alberto. Universidad Nacional del Sur. Departamento de Agronomía; Argentina Fil: Bolletta, Andrea Ivana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bordenave; Argentina. 2022-10-14T14:38:52Z 2022-10-14T14:38:52Z 2007-03 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/13124 0378-1844 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Asociación Interciencia, Venezuela Interciencia 32 (3) : 206-212 (marzo 2007) |
| spellingShingle | Gramineas Plantas Perennes Agua del Suelo Etapas de Desarrollo de la Planta Grasses Perennials Soil Water Root Length Plant Developmental Stages Busso, Carlos Alberto Bolletta, Andrea Ivana Perennial grasses of different successional stages under various soil water inputs: do they differ in root length density? |
| title | Perennial grasses of different successional stages under various soil water inputs: do they differ in root length density? |
| title_full | Perennial grasses of different successional stages under various soil water inputs: do they differ in root length density? |
| title_fullStr | Perennial grasses of different successional stages under various soil water inputs: do they differ in root length density? |
| title_full_unstemmed | Perennial grasses of different successional stages under various soil water inputs: do they differ in root length density? |
| title_short | Perennial grasses of different successional stages under various soil water inputs: do they differ in root length density? |
| title_sort | perennial grasses of different successional stages under various soil water inputs do they differ in root length density |
| topic | Gramineas Plantas Perennes Agua del Suelo Etapas de Desarrollo de la Planta Grasses Perennials Soil Water Root Length Plant Developmental Stages |
| url | http://hdl.handle.net/20.500.12123/13124 |
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