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Registros recuperados: 12
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Bioeconomic Modeling of the Invasive Aquatic Plants Hydrilla verticillata (hydrilla), Eichhornia crassipes (water hyacinth), and Pistia stratiotes (water lettuce) and their impacts on angler effort on Florida lakes AgEcon
Adams, Damian C.; Lee, Donna J..
The invasive aquatic plants Hydrilla verticillata (hydrilla), Eichhornia crassipes (water hyacinth), and Pistia stratiotes (water lettuce) have the potential to negatively impact recreational use of Florida lakes if consistent, adequate control expenditures are not made. In the mid-1990's, Florida significantly reduced its spending on invasive aquatic plant control measures, which resulted in a significant increase in needed control expenditures in subsequent years. This paper attempts to formalize a relationship between coverage of these invasive aquatic plants and angler effort on Florida lakes using data on 38 lakes over 20 years. Estimated regression coefficients are used to simulate control alternatives, and expenditure cost-benefit comparisons are...
Tipo: Conference Paper or Presentation Palavras-chave: Hydrilla; Water hyacinth; Water lettuce; Bioeconomic; Invasive; Control; Resource /Energy Economics and Policy.
Ano: 2005 URL: http://purl.umn.edu/19146
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Biofilter efficiency of Eichhornia crassipes in wastewater treatment of fish farming in Amazonia: Eficiencia de Eichhornia crassipes como biofiltro en el tratamiento de aguas residuales de la piscicultura en el Amazonas Phyton
Rubim,MAL; Isolino Sampaio,PR; Parolin,P.
Fish is a very important part of the human diet in Amazonia. Near the growing cities, fish populations and individual size have decreased over the past decades. Alternatives to traditional and industrial fishing arise, including fish farming. Strategies to minimize the impact of fish farms on the environment are needed to have a regular and healthy fsh supply. This is to avoid a reduction of biodiversity, a depletion of natural resources, and/or the induction of significant changes in the structure and functioning of adjacent ecosystems. Very little research has been performed on management of efluents as to maintain the quality of water resources. The present study aimed at testing the efficiency of the Amazonian aquatic macrophyte Eichhornia crassipes as...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture; Amazon; Effluent; Fish farming; Biofilters; Aquatic macrophytes; Water hyacinth.
Ano: 2015 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100031
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Effects of two potent biocontrol agents on water hyacinth International Rice Research Institute
Praveena, R.; Naseema, A..
p.40
Palavras-chave: Water hyacinth; Eichhornia crassipes; Aquatic weeds; Biological control; Mycoherbicides; Plant pathogenic fungi; Biological control agents; Weed control.
Ano: 2003 URL: http://hdl.handle.net/123456789/1346
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Establishment, spread and impact of Neochetina spp. weevils (Coleoptera: Curculionidae) on Water Hyacinth in Lake Victoria, Kenya OceanDocs
Njoka, S.W.; Ochiel, G.S.; Mailu, A.M.; Gitonga, W..
The Kenya Agricultural Research Institute imported 12,300 curculionid weevils (Neochetina spp.) from diverse sources, for biological control of water hyacinth in Lake Victoria, as part of the World Bank-funded Lake Victoria Environmental Management Project in East Africa. In addition to the rearing and quarantine facility at Muguga, a second rearing facility was established in 1996 at Kibos, near Lake Victoria. The Kibos rearing facility and two community rearing facilities at the lakeshores, have produced approximately 100,000 adult weevils and 42,000 weevil eggs over a three-year period. Since January 1997, some 73,500 Neochetina weevils have been released at 29 sites and an additional 10,000 redistributed at several sites. Visual observations and...
Tipo: Proceedings Paper Palavras-chave: Environmental conditions; Environmental effects; Environmental protection; Inland waters; Biological control; Environmental conditions; Environmental protection; Inland waters; Water hyacinth; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_15898; Http://aims.fao.org/aos/agrovoc/c_3876; Http://aims.fao.org/aos/agrovoc/c_15267.
Ano: 2001 URL: http://hdl.handle.net/1834/1283
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Evaluation of biogas yield from water leaf plant (Talinum triangulare) CIGR Journal
Ogunwande, Gbolabo Abidemi; Muritala, Adam O; Babalola, Waliu O.
The exploitation of plant materials for renewable source of energy in form of biogas is of growing interest. Water leaf (Talinum triangulare), an abundantly available underutilized herbaceous perennial plant in South-Western Nigeria was digested to assess its biogas yield. Water leaf (WL) and Water hyacinth (Eichhornia crassipes) alone, and mixtures of water hyacinth (WH) and WL at ratios 70:30, 50:50 and 30:70 (w:w dry basis) were digested to compare biogas yields. Fixed amount of cow dung was added to each treatment before digestion in batch-type anaerobic digesters for 70 days. The results of the study showed that feedstock mixture affected (p ≤ 0.05) pH and biogas yield. WL proved to be prolific in biogas as it yielded approximately six times greater...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural and Environmental Engineering Water leaf; Water hyacinth; Cow dung; Co-digestion; Biogas yield.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2841
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Glyphosate Effectiveness in the Control of Macrophytes Under a Greenhouse Condition Planta Daninha
Cruz,C.; Silva,A.F.; Luna,L.V.; Yamauchi,A.K.F.; Garlich,N.; Pitelli,R.A..
The aim of this study was to assess the effectiveness of glyphosate, as Rodeo(r) formulation, to control Eichhornia crassipes, Pistia stratiotes, Salvinia molesta, Salvinia herzogii and Urochloa subquadripara, under greenhouse conditions. The doses assessed were (480, 960, 1440, 1920, 2400, 2880, 3360 and 3840 g ha-1 of glyphosate) with 0.5% of the Aterbane(r) BR surfactant and a control, with no herbicide application. All experiments were conducted in a completely randomized experimental design with ten replications. Applications were carried out by precision backpack sprayer at a CO2 constant pressure of 25 psi and spray solution consumption of 200 L ha-1. Product effectiveness was determined by assessing the growth inhibitions and phytotoxicity signals...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water hyacinth; Water lettuce; Salvinia and tanner-grass.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200241
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Macrophytes of Lake Victoria and succession after invasion of Water Hyacinth OceanDocs
Omondi, R.; Kusewa, Mwende.
The distribution of Lake Victoria (Kenya) macrophytes is described. Succession of macrophytes in the lake became more dramatic and dynamic after invasion of water hyacinth. The weed pushes and smothers other free-floating macrophytes like Pistia stratiotes. It then provides substrates for the emergent Vossia cuspidata, which later reduces its population by competition for light and nutrients. The noxious weed is believed to have led to extinction of Azolla nilotica in the lake.
Tipo: Proceedings Paper Palavras-chave: Aquatic plants; Ecological succession; Introduced species; Species extinction; Inland waters; Water reservoirs; Geographical distribution; Emergent vegetation; Competition; Water bodies; Aquatic plants; Water hyacinth; Http://aims.fao.org/aos/agrovoc/c_559; Http://aims.fao.org/aos/agrovoc/c_15267.
Ano: 2006 URL: http://hdl.handle.net/1834/1496
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Remediation of nutrients runoff from feedlot by hydroponic treatment CIGR Journal
Rahman, Shafiqur.
Nutrient runoff from feedlot can contaminate surface and groundwater and may cause eutrophication if not managed properly. In this study, a cost-effective and environmentally friendly hydroponic treatment was compared with the standard Hoagland solution for treating feedlot runoff and evaluating plant growth and nutrient removal under greenhouse conditions. The hydroponic remediation method was evaluated in batches using 10 L of feedlot runoff and Hoagland solution individually applied in a plastic tub planted with water hyacinth (Eichhornia crassipes), water lettuce (Postia stratiotes), and sorghum (Sorghum bicolor) separately. Water samples were collected weekly and plant biomass were collected at the beginning and the end of the experiment. The sorghum...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hoagland solution; Water hyacinth; Water lettuce; Sorghum.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3400
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Removal of organic matter and nutrients from slaughterhouse wastewater by using Eichhornia crassipes and evaluation of the generated biomass composting REA
Mees,Juliana B. R.; Gomes,Simone D.; Boas,Márcio A. Vilas; Fazolo,Ajadir; Sampaio,Sílvio C..
The objective of this research was to evaluate the performance of the aquatic macrophyte Eichhornia crassipes applied in situ in a slaughter house treatment system, located in the west of the Paraná state, Brazil, regarding the nutrients removal and organic matter. Moreover, it aimed to obtain data from the production, management and composting practices of the biomass generated in the system. During 11 months of macrophytes development, physic and chemical parameters were monitored and plant density was controlled by periodical removal of excess biomass, which was weekly monitored and it is expressed in kg of aquatic plant per m² covered area. The degradation of the macrophytes removed from the treatment system was evaluated at the pilot scale in eight...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agroindustrial effluent; Nutrient removal; Water hyacinth; Composting; C:N ratio.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162009000300013
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The effect of water Hyacinth, Eichhornia Crassipes, infestation on phytoplankton productivity in Lake Naivasha and the status of control OceanDocs
Mironga, John Momanyi.
The paper presents data collected in an assessment of effects of water hyacinth infestation on phytoplankton productivity in Lake Naivasha, Kenya. A summary of the status of control and strategies for the future is given. The ecological effects of water hyacinth, Eichhornia Crassipes, on Lake Naivasha have received little attention compared to the large body of work available on the weed’s socioeconomic impact on the country’s water ways and methods for its removal. This study was conducted to determine if water hyacinth infestation in Lake Naivasha affects phytoplankton productivity. Several sampling stations were set up in the lake at sites where the floating mats of the weed were present and sites where the weed was absent. Phytoplankton chlorophyll-a...
Tipo: Proceedings Paper Palavras-chave: Aquatic plants; Freshwater weeds; Infestation; Primary production; Ecological crisis; Environmental effects; Check lists; Species diversity; Phytoplankton; Socioeconomic aspects; Biodiversity; Community composition; Primary production; Aquatic plants; Species diversity; Water hyacinth; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_559; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_15267.
Ano: 2006 URL: http://hdl.handle.net/1834/1497
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The physiological and biochemical mechanism of nitrate-nitrogen removal by water hyacinth from agriculture eutrophic wastewater BABT
Wenwei,WU; Ang,LIU; Konghuan,WU; Lei,ZHAO; Xiaohua,BAI; Kun-zhi,LI; ASHRAF,Muhammad Aqeel; Limei,CHEN.
ABSTRACT Large amount of agriculturl wastewater containing high level nitrate-nitrogen (NO3 --N) is produced from modern intensive agricultural production management due to the excessive use of chemical fertilizers and livestock scale farming. The hydroponic experiment of water hyacinth was conducted for analyzing the content of NO3 --N, soluble sugar content, N-transported the amino acid content and growth change in water hyacinth to explore its purification ability to remove NO3 --N from agriculture eutrophic wastewater and physiological and biochemical mechanism of this plant to remove NO3 --N. The results showed that the water hyacinth could effectively utilize the NO3 --N from agriculture eutrophic wastewater. Compared with the control, the contents...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water hyacinth; Nitrate-nitrogen removal; Nitrate conversion; N-transported amino acids.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000200200
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Экспериментальное исследование роста водного гиацинта Eichornia crassipes IBSS Repository
Горбунова, С. Ю.; Фомин, Н. В..
Приведены результаты исследования особенностей роста водного гиацинта Eichornia crassipes при выращивании на модельных с/х сточных водах. Определен период удвоения количества растений путём вегетативного деления, который составил 25 суток. Показано, что лимитирование роста водного гиацинта питательными веществами приводит к уменьшению массы отдельных растений, при этом они продолжают размножаться. http://biotex.ibss.org.ua/
Tipo: Journal Contribution Palavras-chave: Водный гиацинт; Сточные воды; Биогенные элементы; Вегетативный рост; Water hyacinth; Sewages; Biogen elements; Vegetative growth.
Ano: 2010 URL: http://repository.ibss.org.ua/dspace/handle/99011/1748
Registros recuperados: 12
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