Root proliferation in native perennial grasses of arid Patagonia, Argentina
Pappophorum vaginatum is the most abundant C4 perennial grass desirable to livestock in rangelands of northeastern Patagonia, Argentina. We hypothesized that (1) defoliation reduce net primary productivity, and root length density and weight in the native species, and (2) root net primary productivi...
Guardado en:
| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2014
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/100085 https://ri.conicet.gov.ar/11336/14510 |
| Aporte de: |
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I19-R120-10915-100085 |
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dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Agrarias Aristida species Competitive ability Pappophorum vaginatum Sporobolus cryptandrus Warm-season perennial grasses |
| spellingShingle |
Ciencias Agrarias Aristida species Competitive ability Pappophorum vaginatum Sporobolus cryptandrus Warm-season perennial grasses Torres, Yanina Alejandra Busso, Carlos Alberto Montenegro, Oscar A. Ithurrart, Leticia Soledad Giorgetti, Hugo D. Rodríguez, Gustavo Bentivegna, Diego Javier Brevedan, Roberto Fernandez, Osvaldo Alberto Mujica, María de la Merced Baioni, Sandra S. Entio, Lisandro José Fioretti, María N. Tucat, Guillermo Root proliferation in native perennial grasses of arid Patagonia, Argentina |
| topic_facet |
Ciencias Agrarias Aristida species Competitive ability Pappophorum vaginatum Sporobolus cryptandrus Warm-season perennial grasses |
| description |
Pappophorum vaginatum is the most abundant C4 perennial grass desirable to livestock in rangelands of northeastern Patagonia, Argentina. We hypothesized that (1) defoliation reduce net primary productivity, and root length density and weight in the native species, and (2) root net primary productivity, and root length density and weight, are greater in P. vaginatum than in the other, less desirable, native species (i.e., Aristida spegazzinii, A. subulata and Sporobolus cryptandrus). Plants of all species were either exposed or not to a severe defoliation twice a year during two growing seasons. Root proliferation was measured using the cylinder method. Cylindrical, iron structures, wrapped up using nylon mesh, were buried diagonally from the periphery to the center on individual plants. These structures, initially filled with soil without any organic residue, were dug up from the soil on 25 April 2008, after two successive defoliations in mid-spring 2007. During the second growing season (2008–2009), cylinders were destructively harvested on 4 April 2009, after one or two defoliations in mid-and/or late-spring, respectively. Roots grown into the cylinders were obtained after washing the soil manually. Defoliation during two successive years did reduce the study variables only after plants of all species were defoliated twice, which supported the first hypothesis. The greater root net primary productivity, root length density and weight in P. vaginatum than in the other native species, in support of the second hypothesis, could help to explain its greater abundance in rangelands of Argentina. |
| format |
Articulo Articulo |
| author |
Torres, Yanina Alejandra Busso, Carlos Alberto Montenegro, Oscar A. Ithurrart, Leticia Soledad Giorgetti, Hugo D. Rodríguez, Gustavo Bentivegna, Diego Javier Brevedan, Roberto Fernandez, Osvaldo Alberto Mujica, María de la Merced Baioni, Sandra S. Entio, Lisandro José Fioretti, María N. Tucat, Guillermo |
| author_facet |
Torres, Yanina Alejandra Busso, Carlos Alberto Montenegro, Oscar A. Ithurrart, Leticia Soledad Giorgetti, Hugo D. Rodríguez, Gustavo Bentivegna, Diego Javier Brevedan, Roberto Fernandez, Osvaldo Alberto Mujica, María de la Merced Baioni, Sandra S. Entio, Lisandro José Fioretti, María N. Tucat, Guillermo |
| author_sort |
Torres, Yanina Alejandra |
| title |
Root proliferation in native perennial grasses of arid Patagonia, Argentina |
| title_short |
Root proliferation in native perennial grasses of arid Patagonia, Argentina |
| title_full |
Root proliferation in native perennial grasses of arid Patagonia, Argentina |
| title_fullStr |
Root proliferation in native perennial grasses of arid Patagonia, Argentina |
| title_full_unstemmed |
Root proliferation in native perennial grasses of arid Patagonia, Argentina |
| title_sort |
root proliferation in native perennial grasses of arid patagonia, argentina |
| publishDate |
2014 |
| url |
http://sedici.unlp.edu.ar/handle/10915/100085 https://ri.conicet.gov.ar/11336/14510 |
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