Biblioteca Digital de VanguardiaMinimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year
In deserts, seedling emergence occurs only after precipitation threshold has been exceeded, however, the presence of trees modifies microenvironmental conditions that might affect the effectiveness of a water pulse. In the Monte desert, Prosopis flexuosa trees generate different micro-environmental...
| Autores principales: | , , |
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| Formato: | Artículo |
| Lenguaje: | Español |
| Publicado: |
Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias
2013
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| Materias: | |
| Acceso en línea: | http://bdigital.uncu.edu.ar/6113 |
| _version_ | 1782341361461100544 |
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| author | Greco, Silvina A. Sartor, Carmen E. Villagra, Pablo E. |
| author_facet | Greco, Silvina A. Sartor, Carmen E. Villagra, Pablo E. |
| author_sort | Greco, Silvina A. |
| collection | Repositorio |
| description | In deserts, seedling emergence occurs only
after precipitation threshold has been exceeded,
however, the presence of trees modifies microenvironmental
conditions that might affect the
effectiveness of a water pulse. In the Monte
desert, Prosopis flexuosa trees generate
different micro-environmental conditions that
might influence grass seedlings establishment.
The objective of this work was: a) to know
the effective minimum water input event that
triggers the emergence of native perennial
grass seedlings; b) to relate this fact with the
effect of the shade of P. flexuosa canopy and
the seasonal temperatures. Three important
forage species of the Monte were studied:
Pappophorum caespitosum and Trichloris crinita,
with C4, and Jarava ichu, with C3 metabolism.
Each season, seeds of these species were sown
in pots placed at two light conditions: shade
(similar to P. flexuosa cover) and open area, and
with seven irrigation treatments (0, 10, 20, 30,
40, 2*10 and 3*10 mm). J. ichu did not emerge
in any of the treatments. Significant seedling
emergence was registered for P. caespitosum
and T. crinita in shade conditions with 40 mm
irrigation treatment in summer. Since 40 mm
precipitation events are infrequent in the Monte,
seedling emergence for these species would
be restricted to exceptional rainy years. The
facilitating effect of P. flexuosa shade would be
important during the hot season. |
| format | Artículo |
| id | uncu-6113 |
| institution | Biblioteca Digital - UNCUYO |
| language | Español |
| publishDate | 2013 |
| publisher | Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias
|
| record_format | ojs |
| spelling | uncu-61132014-10-22T12:59:03Z Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year Pulso mínimo de agua para la emergencia de plántulas de tres especies de gramíneas perennes nativas del Monte Central (Argentina), influenciado por el efecto de la sombra y la estación del año Greco, Silvina A. Sartor, Carmen E. Villagra, Pablo E. Gramíneas Monte Central (Argentina) Necesidades de agua Sombra Grasses Water requirements Shade Desierto del Monte Facilitación Emergencia de plántula Época del año Facilitation Seedling emergences Season In deserts, seedling emergence occurs only after precipitation threshold has been exceeded, however, the presence of trees modifies microenvironmental conditions that might affect the effectiveness of a water pulse. In the Monte desert, Prosopis flexuosa trees generate different micro-environmental conditions that might influence grass seedlings establishment. The objective of this work was: a) to know the effective minimum water input event that triggers the emergence of native perennial grass seedlings; b) to relate this fact with the effect of the shade of P. flexuosa canopy and the seasonal temperatures. Three important forage species of the Monte were studied: Pappophorum caespitosum and Trichloris crinita, with C4, and Jarava ichu, with C3 metabolism. Each season, seeds of these species were sown in pots placed at two light conditions: shade (similar to P. flexuosa cover) and open area, and with seven irrigation treatments (0, 10, 20, 30, 40, 2*10 and 3*10 mm). J. ichu did not emerge in any of the treatments. Significant seedling emergence was registered for P. caespitosum and T. crinita in shade conditions with 40 mm irrigation treatment in summer. Since 40 mm precipitation events are infrequent in the Monte, seedling emergence for these species would be restricted to exceptional rainy years. The facilitating effect of P. flexuosa shade would be important during the hot season. En los desiertos, la emergencia de las plántulas se produce cuando un evento de precipitación excede un valor umbral. La presencia de árboles modifica las condiciones micro ambientales y en consecuencia, la efectividad de los eventos de lluvia. En el Monte, las condiciones generadas por Prosopis flexuosa (algarrobo) afectarían el establecimiento de las gramíneas. El objetivo del trabajo fue: a) conocer el evento mínimo de agua necesario para desencadenar la emergencia de gramíneas perennes; b) relacionarlo con la influencia de la sombra del algarrobo y las temperaturas estacionales. Se trabajó con tres especies nativas de gramíneas forrajeras perennes: Pappophorum caespitosum, Trichloris crinita, (C4), y Jarava ichu (C3). En cada estación del año, semillas de las tres especies fueron sembradas en macetas bajo dos condiciones lumínicas: sombra (similar a la sombra de P. flexuosa) y área abierta y con siete niveles de riego (0, 10, 20, 30, 40, 2*10 y 3*10 mm). Jarava ichu no emergió en ningún tratamiento. En el verano se obtuvo emergencia significativa de T. crinita y P. caespitosum solo en los tratamientos de 40 mm y a la sombra. Debido a que en el Monte los eventos de precipitación de 40 mm son infrecuentes, la emergencia de estas especies ocurriría en los años excepcionalmente lluviosos. El efecto facilitador de la sombra del algarrobo sería de importancia en la estación cálida. Fil: Greco, Silvina A.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias Fil: Sartor, Carmen E.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias Fil: Villagra, Pablo E.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias 78 Revista de la Facultad de Ciencias Agrarias Vol. 45, no. 2 Revista de la Facultad de Ciencias Agrarias, Vol. 45, no. 2 2013-12-02 spa Español http://bdigital.uncu.edu.ar/6005 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar/ article info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias http://bdigital.uncu.edu.ar/6113 |
| spellingShingle | Gramíneas Monte Central (Argentina) Necesidades de agua Sombra Grasses Water requirements Shade Desierto del Monte Facilitación Emergencia de plántula Época del año Facilitation Seedling emergences Season Greco, Silvina A. Sartor, Carmen E. Villagra, Pablo E. Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year |
| title | Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year
|
| title_full | Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year
|
| title_fullStr | Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year
|
| title_full_unstemmed | Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year
|
| title_short | Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year
|
| title_sort | minimum water input event for seedling emergence of three native perennial grasses of the central monte desert (argentina) influenced by the effect of shade and the season of the year |
| topic | Gramíneas Monte Central (Argentina) Necesidades de agua Sombra Grasses Water requirements Shade Desierto del Monte Facilitación Emergencia de plántula Época del año Facilitation Seedling emergences Season |
| url | http://bdigital.uncu.edu.ar/6113 |