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| CABRERA,D.C.; CHAILA,S.; SOBRERO,M.T.; VARELA,A.E.. |
| ABSTRACT: Weeds constitute the main constraint on the productivity of sugarcane agroecosystems in Argentina. This work aimed to analyze the floristic and phytosociological composition of sugarcane weed communities in different agroecological areas in Tucumán. Fifteen plots from each area were sampled 60 to 90 days after crop shooting, by throwing a 0.5 m x 0.5 m quadrat metallic frame six times in random directions in each of the plots. Species found within the frame were identified. Later, fresh and dry biomass weight were calculated per quadrat sample and species. Frequency, density, dominance, importance value index, Shannon-Wiener and Simpson species diversity index and Jaccard similarity index were calculated. The unweighted pair group method with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sacharum officinarum L.; Importance value index; Diversity; Similarity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100226 |
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| Alanís-Rodríguez,Eduardo; Molina-Guerra,Víctor M.; Jiménez-Pérez,Javier; Rubio-Camacho,Ernesto A.; Mora-Olivo,Arturo; Collantes-Chávez-Costa,Alejandro; Marroquín-Castillo,Jonathan J.. |
| Abstract Background: Although the mesquite (mesquital or mezquital in Spanish) is one of the representative ecosystems of the landscapes in the north of Mexico, it is also one of the least studied. This study evaluated the structure (horizontal and vertical) and diversity of a plant community of mesquite in Northeastern Mexico. Three plots of 1,600 m2 each were established. All trees and shrubs with a basal diameter (d0.10) ≥ 0.5 cm were recorded, and total height (h) and crown diameter (dcrown) were measured. Results: There were 8 families, 12 genera and 14 species. The genus presenting the most species was Acacia (three species). The most representative family was Fabaceae with seven species. The evaluated community presents a density of 375... |
| Tipo: Journal article |
Palavras-chave: Importance value index; Margalef diversity index; Mesquital; Plant community; Prosopis glandulosa; Shannon index. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2017000100201 |
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