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Seasonal Relationships between Nitrogen Nutrition and Soluble Carbohydrates in the Leaves of Agrostis palustris Huds., and Poa pratemis L. 1
Author(s) -
Green David G.,
Beard James B.
Publication year - 1969
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1969.00021962006100010036x
Subject(s) - poa pratensis , agrostis , nitrogen , monosaccharide , sucrose , carbohydrate , agronomy , poaceae , growing season , chemistry , fructan , cultivar , biology , agrostis stolonifera , botany , food science , biochemistry , organic chemistry
Swards of ‘Toronto’ creeping bentgrass , Agrostic palustris Huds.) and two cultivars of Kentucky bluegrass ( Poa pratensis L.), ‘common’ and ‘Merion,’ were fertilized at rates of 0,146, 292, 438, and 584 kg of nitrogen/ha (o, 3, 6, 9, and 12 lb nitrogen/1,000 2 ft) per season. The concentrations of five carbohydrates were determined throughout the growing season from leaf tissue of grass plants subjected to these nitrogen (N) treatments. The oligosaccharides, particularly those of higher molecular weight than sucrose, were the sugars most responsive to the N treatments. Oligosaccharides decreased in concentration with increased N treatment. The N treatments did not produce concentraion differenials in the di‐ and monosaccharides. Treatments providing more than 73 kg N/ha (1 ½ lb soluble N/1,000 2 ft) per application resulted in equivalent carbohydrate concentrations In the leaf tissue.