Characterization of the active seed bank in carrot crops in the municipallity of Villa Pinzón (Cundinamarca)
The characterization of weed community associated to crops allows to monitor the effect of human activities on ecosystems, besides being the basis for the establishment of efficient management strategies. With the objective to characterize the active seed bank of two farms dedicated to carrot production in the municipality of Villa Pinzón, samples were taken at three depths (0-15; 15-30 y 30- 45cm), carried to the UPTC greenhouse where they were kept at moisture field capacity to germinate the seeds present; emerging species were identified every 15 days, also the number of species present by recipient and the number of individuals per species, were counted in order to apply parameters as the Jaccard coefficient, the diversity index, the dominance and the importance of value IVI value. A total of eight species belonging to six families were registered (Polygonaceae, Poaceae, Asteraceae, Leguminosae, Chenopodiaceae, Capparidaceae). For the two farms the diversity index reaches a maximum value of 1.28, while for the dominance Simpson the values amounted to 1. The species Polygonum segetum recorded the highest IVI values between 0.32 to 0.93, along with a relative abundance of 0.7 and 0.5 for the both properties. The value for the Jaccard coefficient, was 0.55 indicating that there is similarity in the weed community in the first 30cm. After 135 days a depletion of the emerging populations was observed. It was concluded that P segetum is the most persistent weed in time and in the depths evaluated.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad de Ciencias Aplicadas y Ambientales U.D.C.A
2016
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| Online Access: | https://revistas.udca.edu.co/index.php/ruadc/article/view/83 |
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| Summary: | The characterization of weed community associated to crops allows to monitor the effect of human activities on ecosystems, besides being the basis for the establishment of efficient management strategies. With the objective to characterize the active seed bank of two farms dedicated to carrot production in the municipality of Villa Pinzón, samples were taken at three depths (0-15; 15-30 y 30- 45cm), carried to the UPTC greenhouse where they were kept at moisture field capacity to germinate the seeds present; emerging species were identified every 15 days, also the number of species present by recipient and the number of individuals per species, were counted in order to apply parameters as the Jaccard coefficient, the diversity index, the dominance and the importance of value IVI value. A total of eight species belonging to six families were registered (Polygonaceae, Poaceae, Asteraceae, Leguminosae, Chenopodiaceae, Capparidaceae). For the two farms the diversity index reaches a maximum value of 1.28, while for the dominance Simpson the values amounted to 1. The species Polygonum segetum recorded the highest IVI values between 0.32 to 0.93, along with a relative abundance of 0.7 and 0.5 for the both properties. The value for the Jaccard coefficient, was 0.55 indicating that there is similarity in the weed community in the first 30cm. After 135 days a depletion of the emerging populations was observed. It was concluded that P segetum is the most persistent weed in time and in the depths evaluated. |
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