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Scientific Papers, UASVM Bucharest, Series A, Vol. LIII, 2010, ISSN 1222-5339 RESEARCH ON THE REMANENT EFFECT OF ORGANIC FERTILIZATION ON SILO MAIZE PRODUCTION NICOLETA OLTENACU, C.V. OLTENACU, M. GÎDEA *University of Agronomic Sciences and Veterinary Medicine of Bucharest **Research and Development Institute of Bucharest Keywords: fertilization, manure, yield, influence Abstract In the last decade, it has become imperative to implement a system of sustainable development meant to preserve and improve soil resources, protect biodiversity and reduce pollution, given the changes undergone in agricultural ecosystems and the raised prices of chemical fertilizers. Under these circumstances, organic fertilization represents a viable alternative to increase soil fertility, humus supply in soil so as to obtain high and steady yields with maximized inputs and minimum impact on the environment and end consumers. This paper aims to determine the remanent effect of stable manure on silo maize production. In order to attain this objective in the period 2002-2005, in the pedoclimatic conditions in Belciugatele Didactic Station, a bifactorial experiment was carried out to assess the influence of the studied hybrid (Vultur, Milcov, Paltin) and the amount of the applied manure (40, 50, 60, 70 t/ha) on silo maize production. Following the research there could be seen that the highest yields were obtained at rates of 70 t/ha, the most productive being the Paltin hybrid and least productive the Milcov hybrid. All the hybrids had very significant yield boosts when increasing the applied manure doses. In the second and third year of organic fertilization, the recorded yields were smaller compared to the ones obtained in the first year of fertilization. 339
Scientific Papers, UASVM Bucharest, Series A, Vol. LIII, 2010, ISSN 1222-5339 INFLUENCE OF CHEMICAL FERTILIZATION ON SILO MAIZE PRODUCTION NICOLETA OLTENACU, C.V. OLTENACU, M. GÎDEA *University of Agronomic Sciences and Veterinary Medicine of Bucharest **Research and Development Institute of Bucharest Keywords: hybrid, chemical fertilizers, yield, influence Chemical fertilization is an agrotechnical measure essential in cropping systems and it guarantees yield boosts. At present, when setting up a cropping system, the main criterion to take into account is the influence of a certain technological part, in this case fertilization, of on the agricultural production; however the concept of sustainable development also requires the assessment of the impact on the primary consumer, along with complying with other requirements of environment protection and biodiversity conservation. In order to improve the influence of nitrogen and phosphorus chemical fertilizers inputs on biomass production in silo maize, when grown on the phaeoziom from Belciugatele Didactic Station, a monofactorial experiment was carried out, the fertilization having different doses of nitrogen and phosphorus. In the course of the experiment the Vultur hybrid especially designed for biomass production was used. Following the research carried out between 2002 and 2005, it was observed that the dry biomass production levels were between 6.27 and 8.13 t/ha; the increase of the chemical fertilizer doses applied led to yield boosts compared to the unfertilized treatments. Significant yield boosts were obtained in all three experimenting years when applying N 100 P 50 and N 150 P 100 formulas; between these two there were no significant differences. The increase of dosage over N 150 P 100 results in lower yields 346
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MINISTRY OF EDUCATION, RESEARCH, YO
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ISSN 1222-5339 EDITORIAL BOARD SCIE
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12. Mihaela Monica Aldea, Venera Mi
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37. Venera Mihaela Stroe -MINIMUM T
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61. I. Roşca - RESEARCH REGARDING
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