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Effect of humic substances on phosphorus absorption in italian Ray-Grass

Hafidi, Mohamed and Checkouri, Isabelle and Kaemmerer, Michel and Revel, Jean-Claude and Bailly, Jean-René Effect of humic substances on phosphorus absorption in italian Ray-Grass. (1997) Agrochimica, 41 (1-2). 42-48. ISSN 0002-1857

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Abstract

Numerous authors have investigated the effect of humic compounds on plant production. Certain, using field trials or growth vessels (SCHNITZER and POAPST, 1967; TAN et al., 1979 a; MULLER-WEGENER, 1988), attributed the favourable effect of such compounds to their action on various soil properties i.e. cation exchange capacity, water retention, structural stability, etc. Other authors observed positive effects on mycorrhizal formation (TAN et al., 1979 b; SCHISLER and LINDERMAN, 1989), rhizogenesis (FORTIN and LOPEZ-FANDO, 1982) yield (LEMAIRE, 1972) and mineral supply, especially phosphate: already in 1880, DEHERAIN and KAYSER verified that humic substances improve phosphorus plant nutrition. CHAMINADE (1944) confirmed that fact like a lot authors an LOBARTINI et al. (1994) and BIDEGAIN (1995) for the last. In this latter case, the effects of humic substances on phosphorus availability were attributed to the ability of such to produce complexes with cations which, in their absence, would otherwise form insoluble compounds with posphates (KUTE, 1967; GARAPIN, 1989; HAFIDI, 1990; BRUN, 1993). The aim of this work was to investigate this hypothesis more thoroughly by examining the effect of the addition of humic substances on phosphate nutrition and growth in rye-grass depending on whether the phosphates were likely to be retrograted or not.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > University of Cadi Ayyad - UCAM (MOROCCO)
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Deposited By: Sandra BARON
Deposited On:01 Sep 2017 08:32

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