Particle Size and Biochemical Fractionation of Soil Organic Carbon Associated with the Roots of some Rangeland Plants

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

LOTFI PARSA H.; Sheklabadi M.; ASADIAN GH.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Journal of Water and Soil Year:2019 | Volume:33 | Issue:5 Page(s): 763-778

Download Full-Text

Persian Verion

View:

420

Download:

Cites:

Information Journal Paper

Title

Particle Size and Biochemical Fractionation of Soil Organic Carbon Associated with the Roots of some Rangeland Plants

Author(s)

LOTFI PARSA H. | Sheklabadi M. | ASADIAN GH. | Issue Writer Certificate

Keywords

Biochemical fractionQ2

Organo-mineral complexesQ2

Physical fractionQ2

Rangeland plantsQ1

RhizosphereQ1

Abstract

Introduction: Soil organic carbon (SOC) is released from decomposition of plant residues, while root secretion products in Rhizosphere are also a substantial source of SOC input to soil. Binding SOC to clay minerals leads to increase aggregate stability and protects organic carbon against microorganisms. Organo-mineral complexes have important role in decreasing organic carbon decomposition. Assessment of organic carbon, particle Size and Biochemical fractionation is an appropriate approach to investigate organic carbon dynamics and durability against microorganisms in Rhizosphere as a hot spot of activity. Materials and Methods: This study area located in a semi-arid rangeland with main plants species including five perennial rangeland species: crested wheat grass (Agropyroncristatum), astragalus (Astragalusverus), sheep fescue (Festucaovina), phlomis (Phlomisoliveri), feverfew (Tanacetumparthenium). Whole soil surrounding plant roots with all roots was taken for each plant. Three samples with different distances from root surface were taken by applying this procedure: sample A: The soil which is adhered to the root surface and separates quickly from roots after drying, sample B: The soil in root zone, which is not stuck and almost is so close to roots, sample C: The soil which is wholly far from root area and apparently not affected by the roots. Intact samples removed from ground and transferred quickly to laboratory to separate roots and soils with different distances from root surface by drying the root system before shaking. Particle size fractionation was done by wet sieving of aggregates and SOC in different aggregate sizes and was measured by wet combustion method. Biochemical fractionation of SOC was performed by acid hydrolysis method to study organic carbon stability at different distances from root surface. Results and Discussion: ANOVA results showed the significant effects of plants and distance from root surface on aggregate size classes. The results showed the increasing amounts of microaggregates at root vicinities compare to macroaggregates. By increasing distance from root surface, the >2 mm aggregates increased, but, the amount of <0. 15 mm aggregates decreased significantly. Towards root surface from C to A locations, the mean weight diameter (MWD) of soil aggregates decreased due to decreasing macro-aggregates at root vicinity. By the way, SOC increased approaching to root surface due to root exudates and rhizodeposits. The highest and lowest SOC content were found in the A location of Feverfew and the C location of Astragalus (4. 16 and 0. 82%), respectively. The OC contents in root vicinity were higher than other locations due to high root exudates and rhizodeposits which had C-containing molecules. Soil OC contents had significant correlation with measured soil parameters. The highest SOC content was found in micro-aggregate and in vicinity of roots. Low-decomposed OC, which have crucial role in linking microaggregates to make macroaggregates, led to high OC contents in macroaggregates. Soil OC Biochemical fractionation demonstrated the higher OC contents in recalcitrant pool at further distances from root surface, while by going toward root vicinity the amounts of OC in water soluble and labile pool increased. In average for A locations, 66% of total OC was measured as water soluble fraction, while for C location, the average fraction of labile and recalcitrant pools from total OC were found 62. 5% and 50%, respectively. As the root exudates have fresh OC such as carbohydrates and sugars, the concentration of OC in water soluble and labile pools were so high at root vicinity. Also, OC in labile and water soluble pools had high correlation coefficient and, contributed to high fractions of total OC in root vicinity. Whilst C in recalcitrant pool were found higher in further distances from root surface, because activities of microorganisms and the fresh OC were decreased toward bulk soil. Conclusion: This study investigated the effect of root activities of five perennial Rangeland plants on the particle size and Biochemical fractionation of soil OC at different distances from root surface. In root vicinity due to addition of fresh OC from roots to soil and more microorganisms’ activities, mineral particles were aggregated to micro-aggregates which contained a large fraction of soluble and labile Soil OC. However recalcitrant OC were dominated in macroaggregates far from root surface. Rangeland plants with various root systems and characteristics had strong impact on particle size and Biochemical fractionation of soil OC which, needs to investigate more. Durability of biochemical C pools have important role in carbon dynamic and stability in soil.

Cites

No record.

References

No record.

Cite

APA: Copy

LOTFI PARSA, H., Sheklabadi, M., & ASADIAN, GH.. (2019). Particle Size and Biochemical Fractionation of Soil Organic Carbon Associated with the Roots of some Rangeland Plants. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), 33(5 ), 763-778. SID. https://sid.ir/paper/394264/en

Vancouver: Copy

LOTFI PARSA H., Sheklabadi M., ASADIAN GH.. Particle Size and Biochemical Fractionation of Soil Organic Carbon Associated with the Roots of some Rangeland Plants. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2019;33(5 ):763-778. Available from: https://sid.ir/paper/394264/en

IEEE: Copy

H. LOTFI PARSA, M. Sheklabadi, and GH. ASADIAN, “Particle Size and Biochemical Fractionation of Soil Organic Carbon Associated with the Roots of some Rangeland Plants,” JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 33, no. 5 , pp. 763–778, 2019, [Online]. Available: https://sid.ir/paper/394264/en

Related Journal Papers