DBPapers
DOI: 10.5593/SGEM2016/B32/S13.039

RESEARCHES REGARDING THE EFFECT OF CROP ROTATION AND FERTILIZATION UPON THE PRODUCTION OF WHEAT AND MAIZE ON THE MOLIC PSAMOSOIL

M.Stefan, D.Gheorghe
Wednesday 7 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-62-9 / ISSN 1314-2704, June 28 - July 6, 2016, Book3 Vol. 2, 295-302 pp

ABSTRACT
The researches were made on the irrigated molic psamosoil from southern Oltenia, with a reduced natural fertility. The wheat and maize were cultivated in monoculture, one crop rotation of two years, two crop rotations of three years, two crop rotations of four years, one crop rotation of five years and one crop rotation of six years on three agrofunds:N0P0, N80P80 and N160P80.
Concerning the influence of crop rotation, the highest production increases were obtained at the wheat cultivated after potato in the six year crop rotation, at the wheat cultivated after soy in the four year crop rotation and at the wheat cultivated after ground nuts in the six year crop rotation, the harvest increases registering values of 3,9 q/ha, 3,4 q/ha, respectively 3,3 q/ha. Regarding the influence of fertilization, it is observed that the wheat production, in comparison with the unfertilized, has risen by 2,8 q/ha at the fertilization with N80P80 and with 4,9 q/ha at the fertilization with N160P80.
The production of maize cultivated in crop rotations is higher than the production achieved in monoculture. The highest production increase, of 10,8 q/ha was registered for the maize cultivated in the five year rotation : wheat – maize – alfalfa – potato - wheat. The four and six year crop rotations have achieved, compared to the monoculture of maize, significant production increases of 9,8, respectively, 9,6 q/ha. The influence of mineral fertilizers upon the production of maize was materialized through obtaining yield increases of 12,6 q/ha at N80P80, and of 19,9 q/ha at N160P80, increases which are highly significant.

Keywords: psamosoils, crop rotations, fertilization, wheat, maize

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