Examinando por Materia "Sewage sludge"

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    PublicaciónAcceso abierto
    Bottom-up effects on arthropod communities in Platycyamus regnellii (Fabaceae) fertilized with dehydrated sewage sludge.
    (Universidad del Valle, 2021-02-03) Fernandes de Souza, Gezilene; Demolin Leite, Germano Leão; Souza Silva, Farley William; Arruda Sampaio, Regynaldo; Silva, Júlia Letícia; Texeira, Gustavo Leal; Alvarenga Soares, Marcus; Cola Zanuncio, José; Sociedad Colombiana de Entomología - Socolen; Universidad del Valle; Montoya Lerma, James
    Sewage sludge is a nitrogen-rich organic compound, which can be used to aid development in plants such as Platycyamus regnellii (Fabaceae), in the recovery of degraded areas. This study aimed to assess the bottom-up effects on leaf mass and percentage of ground cover (leaf litter, herbaceous plants, and grasses) in P. regnellii trees fertilized (or not) with dehydrated sewage sludge and arthropod communities over 24 months. Platycyamus regnellii trees fertilized with dehydrated sewage sludge presented significantly more leaves per branch, branches per tree, and a higher percentage of ground cover compared to unfertilized trees. Phenacoccus sp. (Pseudococcidae) was the most abundant phytophagous insect associated with P. regnellii trees. Fertilization did not affect the abundance, diversity, and species richness of Hemiptera phytophagous on P. regnellii trees. However, fertilized trees presented higher abundance and species richness of trophobiont-tending ants compared to unfertilized trees, with Camponotus sp. being the most abundant regardless of the treatment. Fertilized P. regnellii trees also presented higher species richness of natural enemies compared to unfertilized ones, with Aranae and Dolichopodidae being the most abundant. We concluded that fertilization with dehydrated sewage sludge improved P. regnellii trees leaf mass and ground cover and increased the diversity of trophobiont-tending ants and natural enemies. To our knowledge, this is the first study on the arthropods community associated with this tree species. This suggests that upon fertilization, P. renellii trees are useful for ecological restoration in severely disturbed areas.
  • Miniatura
    PublicaciónAcceso abierto
    Evaluation of heavy metal content on a sodic soil treated with bio-waste.
    (2018-07-23) Gutiérrez C., Mauricio A.; Zúñiga E., Orlando; Benavides B., Jhony A.; Ospina Salazar, Daniel I.; López Posso, Paul G.
    The use of Bio-wastes in agriculture contributes to the conservation of natural resources by recycling carbon and mineral elements. This investigation evaluated the variation of the content of heavy metals in soils affected by sodicity, on which alternating doses of bio-wastes were applied: vinasse, composted swine manure and sewage sludge from a wastewater treatment plant. Ten treatments whith thress doses were omplemented for each bio-waste treatment in addition to the control treatment.