Efeitos no cultivo do milho de um extrato líquido humificado residual, obtido a partir de vermicomposto

Vermicompost (VC) and its extracts (liquid humus) are materials that stimulate the growth and development of the plants, increasing their yield in small and large-scale farming conditions. This paper evaluates the biological effects of a liquid humic extract, previ - ously characterized on the parameters of growth, development and production in the cultivation of maize ( Zea mays L.). To the residual solid remaining after the obtaining liquid humus (Liplant®) from VC cattle manure, was applied a new extraction of humic substances (HS) in basic medium. The new liquid extract (ELH) was applied toleaves of corn plants in field conditions at dilutions of 1:10, 1:20 and 1:30 (v:v). To study the effects of ELH it was evaluated growth, development and production parameters. Chemical and physical characteristics of ELH were similar to aqueous humified compounds. The foliar application of ELH to corn plants, exerted positive effects on length and stem diameter, length of cobs without leaves, cobs fresh weight with and without leaves and on the yield of the number of cobs. From these results, it is possible to propose studies to incorporate this new liquid humus in the initial formulation of liquid humus (Liplant® product) or in its technology of application

Método experimental en la investigación sobre rehabilitación energética residencial

European policies currently focus on energy efficiency as one of the main targets to address, regarding energy retrofitting of the existent housing stock as a priority to reduce energy demand in the building sector. In Europe, an important part of the housing stock built after the Second World War and before the first energy regulations, presents a deficient energy performance and a great energy saving potential through its retrofitting with passive solutions. Several PhD works share the aim to assess the environmental and energy performance of the social housing stock to foresee the most suitable retrofit strategies to carry. Energy simulation tools become essential to predict the energy behaviour of retrofit buildings. However, energy simulation results are not trustworthy without validating the adjustment of energy models to the reality. According to this, monitoring environmental and energy conditions, together with empirical in situ tests in real case study samples, become basic. The aim of this work is to expose the empirical methodology shared by three on-going PhD thesis about environmental and energy assessment of the social housing stock, concerning climate conditions from the South of Spain. This methodology can be adopted in different scales of approach: from an urban level, to residential ensembles or single dwellings.La eficiencia energética es actualmente uno de los principales focos de interés de las políticas europeas, siendo la rehabilitación energética del parque residencial existente una de sus prioridades para reducir la demanda energética del sector de la edificación. En Europa existe un importante parque de viviendas construido en el periodo de postguerra, anterior a las primeras normativas energéticas, que presenta muy bajas prestaciones y un gran potencial de ahorro energético a través de la rehabilitación con sistemas pasivos. Con el objeto de predecir las medidas más adecuadas para la rehabilitación de este parque de viviendas, surgen tesis doctorales encaminadas a evaluar su comportamiento ambiental y energético, siendo el uso de herramientas de simulación energética fundamental para predecir el comportamiento de los edificios rehabilitados. Sin embargo, el resultado obtenido en las simulaciones no es fiable sin la validación previa de los modelos energéticos que demuestren su ajuste con la realidad. Para ello, resulta imprescindible la monitorización de las condiciones ambientales y energéticas, así como la realización de pruebas experimentales en casos de estudio reales. El objetivo de este trabajo es exponer la metodología experimental que comparten tres tesis doctorales en desarrollo, sobre evaluación ambiental y energética del parque residencial, particularizada para las condiciones climáticas del sur de España. Esta metodología se adapta a diferentes escalas de estudio: desde un nivel urbano, a conjuntos residenciales o vivienda

Humic substances from vermicompost enhance urban lettuce production

International audienceUrban agriculture is growing worldwide with the growth of cities. Urban agriculture represents about 20 % of Cuban agriculture. In Cuba, urban agriculture is institutionalized and organized with ecological principles. For instance, local agriculture enhances food security and decreases the use of nonrenewable fertilizers. However, organic crop production in urban environments is challenging because of intensive plant nutrient requirements and disease incidence. Here, we tested an innovative technology based on plant growth promoters isolated from vermicompost and applied directly to lettuce leaves. We monitored plant metabolism by measuring the activities of nitrate reductase, an enzyme linked to N assimilation, and of phenylalanine ammonia lyase, an enzyme linked to plant defense. The experiment was conducted in the organic urban system in Guines, Cuba. We applied liquid humates at 10, 15, or 20 mg C L−1 once at the seedling stage and again 15 days after transplantation. Our results show that humates at 15 mg C L−1 shortened by 21 days the lettuce production cycle, allowing early harvesting without changing quality while increasing yields expressed as the number of leaves per plant. Humate application also decreased total carbohydrate, increased protein, increased nitrate uptake, and stimulated nitrate reductase and phenylalanine ammonia lyase in lettuce leaves

Biotechnology of humified materials obtained from vermicomposts for sustainable agroecological purposes

The application of humic substances (HS) to plants stimulates their biochemical-physiological mechanisms, growth and development. Humified materials exhibit structural characteristics that allow interactions with heavy metal cations dissolved in aqueous environments. Due to their high availability, agriculture-derived vermicomposts (VC) (agro-materials) are excellent raw materials for obtaining HS. Based on these properties, it might be possible to develop biotechnology processes that use agro-materials for environmentally sustainable agriculture. The present article describes the application of a biotechnological working protocol that uses cattle manure vermicompost (CVC) as a raw material for HS. The suggested protocol includes six steps based on the structure-property-biological activity relationships of all the resulting agro-materials. Both the CVC and the resulting agro-materials were characterized using various chemical-physical and spectroscopic techniques. The agro-materials not only increased the agricultural production of different crops at the optimal sowing seasons but also increased production under water and saline stress conditions. The residues arising from the protocol processes were analyzed and found to be useful as decontaminants of heavy metals in aqueous liquid effluents. In addition, the use of such products resulted in increased profits for small- and medium-scale farmers. These studies suggest that agriculture-derived composted organic materials are viable for sustainable agroecological use.Keywords: Vermicompost, humic substances, humic acids, stressAfrican Journal of Biotechnology Vol. 12(7), pp. 625-63

Recital de chant Flamenco

Comprend : DONDE ESTAN TUS CANTAORES (soleares) / Lopez TEJERA ; Roque MONTOYA JARRITO - AR GORPE DER YUNQUE (zambra) / VILLANUEVA, CARO, ROBLES ; Juanito OSUNA - DOBLES FANDANGAZOS (nuevas creaciones) / Molina MOLES, ALFONSO, TORRES ; Pépé PINTO - SOLEARES / OCHAITA, VALERIO ; El Principe Gitano - FANDANGOS / folklore ; Angel ROMERO - ZAMBRA TANGUILLO / GUERRERO ; Antonio MOLINA - GRANADINAS DE LA VEGA / José FUENTES LEON ; Pépe CORDOBA - POR DIOS QUE ME VUELVO LOCO (fandangos) / R. FARINA ; Rafaël FARINA - PENA TENGO PENA (tientos) / QUINTERO, LEON, QUIROGA ; Enrique MONTOYA - MALAGUENA Y FANDANGOS DE GRANADA / H. MONTES ; Cojo de HUELVABnF-Partenariats, Collection sonore - BelieveContient une table des matière

La gran exposición anticomunista del Tercer Reich: Das Sowjetparadies (1942)

Despite its origin can be traced since ancient times, the Atrocity Propaganda became especially relevant as the pivotal theme of the discourses aimed to justify the extreme violence against the “other” during the major conflicts of the Twentieth Century. Few States were as skilled as the Nazi Regime to take advantage of the potential of Art to be the backbone of the process of violent socialization of its citizenship. The power of the image to show a degraded image of the enemy which, in turn, strengthened the validity of the addresser’s arguments is openly revealed at the exhibition Das Sowjetparadies held in Berlin in 1942. In this paper, we analyze the Exhibition contents and reflect on the importance of this type of actions to disseminate an anti-Communist and anti-Semitic discourse