RESEARCH ON THE REMANENT EFFECT OF ORGANIC FERTILIZATION ON SILO MAIZE PRODUCTION

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.