DBPapers
DOI: 10.5593/SGEM2016/B32/S13.057

THE SOIL PHOSPHORUS CONTENTS IN ROMANIAN AGRICULTURAL MONITORING SITES

A. Manea, M. Dumitru, V. Tanase, A. Eftene, S. Dumitru
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, 433-440 pp

ABSTRACT
The soil phosphorus is one of the important indicators selected for assessment of soil function in a soil monitoring program. Romania land agricultural monitoring system, level I (16 x 16 km grid), totalizes 670 sites. In agricultural monitoring plots, the contents of soil phosphorus (PAL, mg/kg ) are studied in 0-20 cm layer and their average value weighted taking into account the horizons thickness, for the 0-50 cm layer. The contents of PAL were presented according to the land uses, soil classes, soil types and on the development regions. The variation of PAL content in the 0-20 cm layer according to land use highlights values in the field of extremely small-very high contents for arable land, pastures, hayfields and orchards and medium - high values for vineyards. In 0-50 cm layer, the mean and median of PAL are lower than those found in agrochemical layer. According to land uses, in the 0-20 cm layer, the average content of PAL decreases in the following order: orchards (45.5 mg/kg) > vineyards (33 mg/kg) > arable land (28.4 mg/kg) > pastures (14.4 mg/kg) > hayfields (13.2 mg/kg). In the 0-50 cm layer, the content of PAL also decreases in the same order from orchards (27.9 mg/kg) to hayfields (8.8 mg/kg), but the contents are smaller. At the level of soil types, in the 0-20 cm layer, the values of PAL range from very low (7 mg/kg) to medium (36 mg/kg), while the median varies from extremely low (4 mg/kg) to medium (29.5 mg/kg). The lowest values belong to Dystric Cambisols, while the highest values to Gleysols.

Keywords: phosphorus, monitoring, agricultural, sites, soil

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