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Bucharest, Romania

Dinca L.,University of Bucharest | Sandoiu D.I.,University of Bucharest | Stefanic G.,University of Bucharest | Moraru A.C.,BIOTEHGEN
Romanian Biotechnological Letters | Year: 2013

Natural productivity of a soil, under favourable climatic conditions, depends on its fertility level. By agro-phytotechnical measures, soil productivity may increase independently of its fertility, and that can be ameliorated or degraded by agro-technologies. Soil Biology, that appeared in the 20th century, has elaborated the theory of soil fertility maintenance and even of amelioration by some measures which could stimulate the life and biochemical processes in soil, as well as quantitative and qualitative increase in humus.The pedo-enzymic part in the circuit of chemical elements in soil is also known, in theory, but in agronomical practice even it is still neglected. Both the theory of plant mineral nutrition and the application of chemical fertlizers are maintained, therefore organic fertilization is rarely used (with stable compost or vegetal composted remains).The present paper deals with the study of some modification of pedo-amidase and pedo-phosphatase indices and of soil's chemical reaction in a reddish preluvosoil, in a stationary experiment of nineteen years. © 2013 University of Bucharest.

Dobre P.,University of Bucharest | Farcas N.,University of Bucharest | Udroiu N.-A.,University of Bucharest | Gidea M.,University of Bucharest | Moraru A.C.,BIOTEHGEN
Romanian Biotechnological Letters | Year: 2014

The research, carried out under the project "Sustainable Initiative Towards Aviation Kerosene" - ITAKA, aimed testing resistance the wintering varieties of Camelina sativa (Camelia - Romania, Calenda - Austria, GP 202 - Germany and GP 204 - Germany), under the conditions of soil and climate in southern Romania. Sowing was done in middle October 2013 using a seed rate of 8 kg/ha. Several trials with different fertilization schemes (based on nitrogen and phosphorus) were implemented. Determination of plant population was firstly done in autumn (before frost period) and then in early spring. For all cultivars tested, the minimal losses were recorded for trials fertilized with medium concentrations of nitrogen and phosphorus (N80 P60) and the highest losses were recorded for the control trials (without fertilization).

Dinu L.-D.,University of Bucharest | Matei P.S.,BIOTEHGEN | Jurcoane S.,BIOTEHGEN | Stoica I.,University of Bucharest
Romanian Biotechnological Letters | Year: 2011

Nowadays, one of the major problems facing the industrialized world is the contamination of soils, groundwater and sediments with pesticides. Despite the valuable contributions associated with the use of pesticides, many of these biologically active chemicals represent a potential hazard to humans and to nature. In this study, biodegradation potential of adapted Pseudomonas aeruginosa S3 has been assessed on karathane (active ingredient dinocap), a contact fungicide and a non-systemic acaricide. The strain was isolated from contaminated soil and adapted to grow on karathane (up to 1%) as the only carbon source that is converted into less toxic and environment friendly compound. The media and process optimization was carried out in order to scale up the process. The higher biomass production was obtained on mineral salt media with corn flour 1% (nitrogen source) and glucose as additional carbon source. Also, the effect of initial pH and inoculum volume on biomass growth has been studied. The biodegradation potential of Pseudomonas aeruginosa S3 has been tested on soil contaminated with 0.2% karathane where the strain degradated 45.8% of pesticide. © 2011 University of Bucharest.

Dobre P.,University of Bucharest | Jurcoane S.,BIOTEHGEN | Matei F.,University of Bucharest | Stelica C.,University of Bucharest | And 2 more authors.
Romanian Biotechnological Letters | Year: 2014

Camelina sativa was cultivated as a second crop, after the main crop represented by triticale. To reduce energy consumption, the minimum tillage system (i.e. without ploughing) was used. The camelina sowing was done on 22 July 2013. The cultivar tested was 'Calena', originating from Austria. Two seed rates were tested, 6 kg/ha and 8 kg/ha, respectively. After sowing, on half of the trials asprinkler irrigation was applied. In order to have low production cost, no fertilizers were applied. The climatic conditions were monitored (temperature and precipitation) during the experiment. It should be noted that camelina crop faced a droughty period and high temperatures in the first two months. This study shows that the yield potential of the irrigated trials was considerably higher (1104.3-1203 kg/ha) in comparison with non-irrigated trials (494.2-800.5 kg/ha) characterized by the fact that emergence lacked uniformity. Also it has been concluded that the sowing must be done in the late June- early July and watering is mandatory after camelina sowing in order to stimulate plant emergence. © 2014 University of Bucharest.

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