Efecto de la remoción de especies y la introducción de maíz sobre la estructura de la comunidad de malezas en la región semiárida de Córdoba, Argentina
The structure of a weed-crop community composed by corn as a crop and several grasses and dicots as weeds was studied by (1) the removal of the dominant species, Sorghum halepense (L.) Pers. (Johnsongrass), (2) the removal ofthe group ofshort, accompanying grasses, Eleusine indica (L.) Gaertn., Digitaria sanguinalis (L.) Scop, and Echinochloa colonum (L.) Link, and (3) the introduction of corn (Zea mays L.). Species aerial biomass and abundance were evaluated. Johnsongrass and corn were the most important organizing species. Removal of Johnsongrass increased evenness and reduced the number of species, whereas the introduction of corn had no effect. Removal of S. halepense increased the biomass of the subordinatt species by 3, but this value only represented 40% of the control weed community. Interference of S. halepense reduced corn biomass by approximately 50%. Corn and the short gramineous species did not affect S. halepense biomass. Interference of corn also reduced the subordinate species biomass, but only by about 50%. Removal ofthe short grassspecies affected neitherthe rest ofsubordinate species nor corn, nor the dominant.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Asociación Argentina de Ecología
1995
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| Online Access: | https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1673 |
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