Spectrophotometric methods to determine carbohydrates in soil

Doutre, Don A.; Hay, George W.; Hood, A. W.; vanLoon, Gary W.

doi:10.1016/0038-0717(78)90036-6

Cited by 52 publications

(24 citation statements)

References 20 publications

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“…Total soil C and N were determined by a dry combustion method (Nelson and Sommers 1982) using an automated analyzer (Carlo Erba, Milan, Italy). Content of total soil polysaccharides was determined by the phenol-sulfuric acid method of Dubois et al (1956) as modified by Doutre et al (1978). Light fraction was isolated by flotation on sodium iodide at a density of 1.7 g cm -3 (Gregorich and Ellert 1993).…”

Section: Sampling and Analysesmentioning

confidence: 99%

Soil and vegetation of ungrazed crested wheatgrass and native rangelands

Broersma¹,

Kržić²,

Thompson³

et al. 2000

Can. J. Soil. Sci.

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Gaertn. and A. desertorum (Fisch.) Schult.], can lead to the reduction of species diversity and soil quality. This study evaluated the effects of crested wheatgrass on soil and vegetation relative to native rangeland dominated by bluebunch wheatgrass [Pseudoroegneria spicata (Pursh) Scribn. & Smith] under ungrazed conditions. Three sites consisting of adjacent ungrazed stands of crested wheatgrass and native vegetation were sampled in June 1997. Total plant cover was 37% on native and 24% on crested wheatgrass rangeland. Species richness was lower for crested wheatgrass than for native rangeland. Quantities of root biomass and most soil properties were similar for the two rangelands. Native rangeland had a more stable soil structure with 1.7 mm mean weight diameter (MWD) and 38% of soil aggregates in the 2-6 mm size fraction compared to 1.4 mm MWD and 28% of soil aggregate in the 2-6 mm size fraction on crested wheatgrass rangeland. Greater soil penetration resistance was observed at the 6 and 7.5 cm depths for crested wheatgrass rangeland. Crested wheatgrass did not invade adjacent native rangelands and only a slight reduction in soil quality was observed on crested wheatgrass rangelands. . Trois emplacements comportant des peuplements jouxtants non pâturés d'agropyre à crête et de végétation naturelle étaient échantillonnés en 1997. La couverture totale du sol était de 37 % sur le parcours naturel et de 25 % sur parcours à agropyre à crête. La diversité spécifique était moindre dans le dernier parcours, mais la biomasse racinaire et la plupart des propriétés du sol étaient semblables dans les deux types de parcours. Le parcours naturel révélait une structure du sol plus stable, avec un diamètre par poids moyen (DPM) de 1,7 mm et une proportion de 38 % d'agrégats dans la fraction granulométrique 2-6 mm, contre des valeurs respectives de 1,4 mm et de 28 % sous le parcours à agropyre à crête lequel par ailleurs manifestait une plus forte résistance à la pénétration aux profondeurs de 6 et de 7,5 cm. Il n'y avait pas eu d'envahissement des parcours naturels avoisinants par l'agropyre à crête et la baisse de qualité du sol attribuable à l'introduction de cette espèce n'était que de peu d'importance.

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Section: Sampling and Analysesmentioning

confidence: 99%

Soil and vegetation of ungrazed crested wheatgrass and native rangelands

Broersma¹,

Kržić²,

Thompson³

et al. 2000

Can. J. Soil. Sci.

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“…In natural conditions, humic compounds seem to play a stabilizing role (Cheshire 1979;Dormaar 1983) (Cheshire et al 1973). This could explain the discrepancy ( (Brink et al 1960) as modified by Doutre et al (1978).…”

Section: Discussionmentioning

confidence: 99%

“…Although pentoses produced negligible absorption at 625 nmwhen reacted with 0.2Vo anthrone reagent (Brink et al 1960;Doutre et al 1978 …”

Section: Discussionmentioning

confidence: 99%

Monosaccharides in Hydrolysates of Water-Stable Aggregates After 67 Years of Cropping to Spring Wheat as Determined by Capillary Gas Chromatography

Dormaar¹

1984

Can. J. Soil. Sci.

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“…The polysaccharide content of the feed was measured by using the total sugar reduction method with anthrone (Cheshire, 1979;Doutre et al, 1978). A 100-mg sample was digested with 12M H,SO, (8 mL) for 2 h with occasional shaking.…”

Section: Wet Chemistry Measurementsmentioning

confidence: 99%