J 2017

Carbon Isotope Study of Soil Amendment with Maize

BUZEK, František, Bohuslava ČEJKOVÁ, Milan GERŠL, Ivana JAČKOVÁ, Zdenka LNĚNÍČKOVÁ et. al.

Basic information

Original name

Carbon Isotope Study of Soil Amendment with Maize

Authors

BUZEK, František (203 Czech Republic, guarantor), Bohuslava ČEJKOVÁ (203 Czech Republic), Milan GERŠL (203 Czech Republic), Ivana JAČKOVÁ (203 Czech Republic), Zdenka LNĚNÍČKOVÁ (203 Czech Republic) and Eva GERŠLOVÁ (203 Czech Republic, belonging to the institution)

Edition

International Journal of Plant & Soil Science, 2017, 2320-7035

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

40104 Soil science

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

RIV identification code

RIV/00216224:14310/17:00096275

Organization unit

Faculty of Science

Keywords in English

13C; digestate; dissolved organic carbon; soil amendment

Tags

Změněno: 9/3/2018 11:08, doc. Mgr. Eva Geršlová, Ph.D.

Abstract

V originále

Maize digestate was applied to follow its sequestration in arable soil profiles with accent on changes in soil organic carbon (SOC) content and the production of dissolved organic matter (DOM). Two control sites with cultivated Cambisols (rye-grass, kohlrabi) were amended by the addition of digestate from maize silage fermentation. Liquid digestate was applied once in the spring in the quantity of 18 g C/ m2. The process of amendment was checked after 4 and 12 months by the use of natural labelling of the amendment by the difference in the carbon isotope composition of the SOC (C3 vegetation) and applied digestate (C4 maize). The amendment was evaluated from the SOC content, dissolved organic carbon (DOC) and their d13C isotope composition by sampling across the soil profiles (0–90 cm). An increase of the carbon content by the amendment was measurable in the upper soil layers (0–20 cm) only. The deep soil layers are poor in carbon content (less than 0.2% of SOC) but rich in clay micro particles, which efficiently adsorbed incoming DOC with infiltrated precipitation. Change of the d13C of soil carbon was measurable down to -80 cm. Applied digestate increased the carbon content of top soil layer only. We did not observe significant migration of C4 amendment from top soil to the deeper soil layers. Digestate addition increased DOC production at both sites for the upper soil layers only. DOC released from the deep soil layers originates from the upper parts of the soil profile and not from the native carbon in the layer.