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Study of immobilization and remobilization of nitrogen fertilizer in cultivated soils by hydrolytic fractionation
Author(s) -
SULÇE S.,
PALMALOPEZ D.,
JACQUIN F.,
VONG P.C.,
GUIRAUD G.
Publication year - 1996
Publication title -
european journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 1351-0754
DOI - 10.1111/j.1365-2389.1996.tb01396.x
Subject(s) - nitrogen , soil water , fractionation , chemistry , organic matter , agronomy , fertilizer , biomass (ecology) , environmental chemistry , extraction (chemistry) , environmental science , soil science , biology , chromatography , organic chemistry
Summary Nitrogen immobilization and remobilization from a fertilizer were determined by hydrolytic fractionation of organic nitrogen with 6 M HC1 into acid–soluble distillable nitrogen (NSAD), acidsoluble nondistillable nitrogen (NSAnD) and nonhydrolysable nitrogen (NnH) on the Ap horizons of eight different soils from Myzeqe (Albania), eastern France, and tropical Mexico. The soils were fertilized with K 15 NO 3 and then incubated at 28°C and 80% of the water holding capacity for 1 month. Mineral N was removed by extraction with a solution of CaCl 2 after which rye grass was sown. The nitrogen taken up by rye grass was thus derived from soil organic matter. The three NSAD, NSAnD and NnH fractions participate in both immobilization and remobilization. The NSAnD fraction was shown to be the most active fraction. Remobilization of the biomass was greater in the sandy brown soils than in the clayey soils, in which intraaggregate immobilization would predominate. Evidently, the physical and chemical properties of the soils have a real bearing on immobilization and remineralization of nitrogen fertilizer in cultivated soils.