SSSAJ Journal of Natural Resources and Life Sciences Education
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 1 July 2008
Published in Soil Sci Soc Am J 72:1158-1162 (2008)
DOI: 10.2136/sssaj2007.0189
© 2008 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Google Scholar
Right arrow Articles by Gutiérrez Boem, F. H.
Right arrow Articles by Taboada, M. A.
PubMed
Right arrow Articles by Gutiérrez Boem, F. H.
Right arrow Articles by Taboada, M. A.
Agricola
Right arrow Articles by Gutiérrez Boem, F. H.
Right arrow Articles by Taboada, M. A.
Related Collections
Right arrow Phosphorus
Right arrow Tillage

NUTRIENT MANAGEMENT & SOIL & PLANT ANALYSIS

Phosphorus Retention on Soil Surface of Tilled and No-tilled Soils

Flavio H. Gutiérrez Boema,*, Carina R. Alvareza, Maria J. Cabelloa, Patricia L. Fernándeza, Alfredo Bonob, Pablo Prystupaa and Miguel A. Taboadaa

a Cátedra de Fertilidad y Fertilizantes, Facultad de Agronomía U.B.A., Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina
b INTA EEA Anguil, Ruta 5 km 580, La Pampa, Argentina

* Corresponding author (gutierre{at}agro.uba.ar).

Decreasing P buffer capacity of the soil surface in no-tilled soils has been attributed to enrichment of both P and OM (OM). As soil surface enrichment with P and OM usually occurs simultaneously in no-tilled soils, it is not clearly established whether the increase of soil OM affects the capacity of soils to retain P. A study was conducted to assess whether the variations in soil OM (total and particulate) at soil surface affects P retention capacity. Thirty five soils from the Rolling Pampa (17 tilled and 18 no-tilled) were selected. All soils had medium to low levels of available P (PBray1 < 20 mg kg–1). Soil samples were taken from the top 5 cm, and several soil characteristics determined: available and total P, P sorption index, OM, particulate OM (POM) ( >53 µm), particle size distribution, and pH. Tilled and no-tilled soils did not differ in soil texture, pH, total and available P content. On the contrary, no-tilled soils had more OM (+14%) and POM (+56%) than tilled soils. The capacity of soils to retain added P was not different in both groups of soils. Phosphorus sorption index was not related to soil content of total OM or POM. Variation in P sorption index was only related to soil clay content (r2 = 0.44). This study provides evidence contradicting the long held assumption that the reported decrease in P sorption at the surface of no-tilled soils was caused in part by OM enrichment.

Abbreviations: OM, organic matter, POM, particulate OM, PSI, phosphorus sorption index






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 2008 by the Soil Science Society of America.