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SEASONAL PATTERN OF WATER‐SOLUBLE CONSTITUENTS FROM LEAVES OF POPULUS בNORTHWEST’ (HORT.)
Author(s) -
DORMAAR J. F.
Publication year - 1970
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1970.tb01157.x
Subject(s) - sugar , growing season , chemistry , phenols , aqueous solution , botany , soil water , composition (language) , polysaccharide , winter season , horticulture , biology , food science , organic chemistry , ecology , climatology , geology , linguistics , philosophy
Summary Aqueous leaf extracts were obtained at regular intervals during the 1967 growing season from Populus בNorthwest’ (Hort.). After lyophilization the samples were analysed for acidity and ash, sugar, phenol, and N contents. They were examined with thin‐layer chromatography and infra‐red spectroscopy. Simple phenolic compounds, present earlier in the growing season, made way for more complex phenols as the season progressed, and the extracted material became more acid. The increased loss of phenolic compounds and acids from the leaves toward the end of the summer continued during their first autumn on the ground. The polysaccharide content decreased during the season. The infra‐red spectra of the lyophilized material were useful in making comparisons. It was concluded that, for percolation and transformation studies of Chemozemic soils, aqueous leaf extracts obtained during late summer or autumn should be the most relevant.