Cultivation effects on carbohydrate contents of soil and soil fractions

Dalal, R. C. and Henry, R. J. (1988) Cultivation effects on carbohydrate contents of soil and soil fractions. Soil Science Society of America Journal, 52 5: 1361-1365.

Author Dalal, R. C.
Henry, R. J.
Title Cultivation effects on carbohydrate contents of soil and soil fractions
Journal name Soil Science Society of America Journal   Check publisher's open access policy
ISSN 0361-5995
Publication date 1988-09
Sub-type Article (original research)
Volume 52
Issue 5
Start page 1361
End page 1365
Total pages 5
Place of publication Madison, WI, United States
Publisher Soil Science Society of America
Language eng
Abstract The distribution of monosaccharides in the acid hydrolysate of soil fractions and whole soils subjected to variable periods of cultivation (0–45 yr) were studied because carbohydrates constitute a substantial proporation of soil organic matter and affect soil aggregation, both of which are affected by cultivation. Monosaccharides in soil acid hydrolysates were analyzed as their alditol acetates by an improved procedure using 1-methylimidazole as acetylation catalyst. Carbohydrate constituted from 8 to 16% of soil organic matter in virgin soils and generally increased with the clay content (18–78% clay). Of this, 27 to 43% of carbohydrate was present in the light fraction (<2 Mg m−3), which also contained proportionally more carbohydrate-C than did total organic matter. Upon cultivation, the light fraction declined rapidly, resulting in substantial loss of carbohydrate, especially in clayey soils. In these soils, carbohydrate losses also occurred from sand-size and silt-size fractions but clay-size carbohydrates were less affected. Glucose and galactose were normally the predominant monosaccharides in the acid hydrolysates of the soils and soil fractions. The effects of cultivation on the net amounts of carbohydrate-C in the various fractions and the whole soil in the three soil series studied, were generally similar to those on the total organic C, showing thereby that carbohydrate fraction of the soil organic matter was no more liable than the total organic C.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
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Created: Mon, 07 Mar 2011, 16:05:08 EST