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Titolo:
Phosphorus dynamics in a long-term P fertilization trial on Luvic Phaeozemat Halle
Autore:
Gransee, A; Merbach, W;
Indirizzi:
Univ Halle Wittenberg, Inst Plant Nutr & Soil Sci, D-06108 Halle, Germany Univ Halle Wittenberg Halle Germany D-06108 Sci, D-06108 Halle, Germany
Titolo Testata:
JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE-ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE
fascicolo: 4, volume: 163, anno: 2000,
pagine: 353 - 357
SICI:
1436-8730(200008)163:4<353:PDIALP>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOIL; PHOSPHATE; RHIZOSPHERE; AVAILABILITY; PLANTS; MAIZE; RAPE;
Keywords:
P-fertilization; P-dynamics; soil analysis; plant analysis; long-term experiment;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Gransee, A Univ Halle Wittenberg, Inst Plant Nutr & Soil Sci, Adam Kuckhoff Str 17B, D-06108 Halle, Germany Univ Halle Wittenberg Adam Kuckhoff Str 17B Halle Germany D-06108
Citazione:
A. Gransee e W. Merbach, "Phosphorus dynamics in a long-term P fertilization trial on Luvic Phaeozemat Halle", J PLANT NU, 163(4), 2000, pp. 353-357

Abstract

The soil of the long-term experiment laid out 1949 in Halle has the potential to supply much P. The P taken up by plants where no P (P0) or 15 kg ha(-1) yr(-1) (P1) was applied was much greater than the P applied as fertilizer (P1). A decrease in yield was measured only after the first 25 years on P0 soils but the P1 treatment has, so far, shown no decrease. Lactate extractions of the soil did not reflect P-uptake suitably. The release of P frominsoluble into water soluble forms was at a minimum after 30 years in P0 soils. pi soils have now also declined to this minimum value and it remains to be seen whether yields decrease in this treatment in the future. Parallel to this trend, the P sorption increased in P0 soils. The subsoil also seems to be an important source for P supply, possibly influenced by root exudates. Further work is needed to gain a better understanding of soil P dynamics in connection with root exudates and microbes and to identify parameters which will provide more reliable means of calculating fertilizer P requirements.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 13:59:00