We hypothesized that amino sugar N concentrations in soils would be higher under N-fixing plants than in adjacent soils away from the leaf canopies of N-fixing plants.
2001) employing the direct alkalization of soil rather than using the soil hydrolysate for amino sugar acid determination.
Average values were calculated for amino sugar nitrogen in soil beneath and beyond plant canopies for each species at each location.
Sand dunes: At Ridges Sanctuary, average amino sugar N concentration of soil beneath speckled alder was greater than both the adjacent and Canada buffaloberry soil averages for amino sugar N concentrations (Table 2).
Black soil prairie: Average soil amino sugar N concentration beneath leguminous leadplant shrubs at Prospect Cemetery was greater than in adjacent soils 2 m distant from its canopies as well as the New Jersey tea soil average.
Soils under speckled alder at the northernmost study locations of Ridges Sanctuary and Whitefish Dunes State Park, Wisconsin exhibited the greatest increase in amino sugar N over adjacent background soils compared with all other N-fixing plants in this study.
Identification and quantification of amino sugars was conducted by capillary gas-liquid chromatography using an HP 5 fused silica column (Agilent Technologies, Inc.
Means of concentrations of VSC-lignin, carbohydrates, amino sugars, organic C, and N of the whole data set were compared by horizons among the 4 experimental sites using 1-way analyses of variance (ANOVA), followed by a post-hoc separation (significant at P = 0.
05) total concentrations of amino sugars were found in the A horizon of the reforestation than the primary and secondary forest and the cabbage cultivation (Fig.
Therefore, microbial compounds such as amino sugars once produced may accumulate through stabilisation by clay particles in soil.
Interpretation of the amino sugar ratios is difficult since the turnover times of the amino sugars may differ.
The patterns of amino sugars were considerably influenced by vegetation and land use.