Humic Acid Mitigates the Negative Effects of High Rates of Biochar Application on Microbial Activity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F20%3A43918584" target="_blank" >RIV/62156489:43410/20:43918584 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41310/20:83827 RIV/00216305:26310/20:PU138512 RIV/26296080:_____/20:N0000101

Result on the web

<a href="https://doi.org/10.3390/su12229524" target="_blank" >https://doi.org/10.3390/su12229524</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/su12229524" target="_blank" >10.3390/su12229524</a>

Result language

angličtina

Original language name

Humic Acid Mitigates the Negative Effects of High Rates of Biochar Application on Microbial Activity

Original language description

Objective: Biochar and a commercial humic acid-rich product, Humac (modified leonardite), represent soil amendments with the broad and beneficial effects on various soil properties. Their combination has been scarcely tested so far, although the positive impact of their interaction might be desirable. Materials and Methods: The dehydrogenase activity (DHA), microbial biomass carbon (Cmic ), soil respiration (basal and substrate-induced), enzyme activities, total carbon (Ctot ), and both shoot and root biomass yield were measured and compared in the short-term pot experiment with the lettuce seedlings. The following treatments were tested: the unamended soil (control), the Humac-amended soil (0.8 g.kgMINUS SIGN 1 ), the biochar-amended soil (low biochar 32 g.kgMINUS SIGN 1, high biochar 80 g.kgMINUS SIGN 1 ), and the soil-amended with biochar + Humac. Results: The effect of both amendments on the soil pH was insignificant. The highest average values of Ctot and Cmic were detected in high biochar treatment and the highest average values of basal and substrate-induced respiration (glucose, glucosamine, alanine) were detected in the low biochar treatment. The phosphatase activity and fresh and dry lettuce aboveground biomass were the highest in the low biochar + Humac treatment. Conclusions: Even though the combination of both biochar + Humac decreased the microbial activities in the amended soil (Cmic, DHA, enzymes, substrate-induced respiration) at the low biochar dose, they mitigated the detrimental effect of the high biochar dose on respiration (all the types) and the enzyme (phosphatase, arylsulphatase) activities. In contrast to the previously published research in this issue, the effects could not be attributed to the change of the soil pH.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

<a href="/en/project/TH03030319" target="_blank" >TH03030319: Promoting the functional diversity of soil organisms by applying classical and modified stable organic matter while preserving the soil's production properties</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Sustainability

ISSN

2071-1050

e-ISSN

—

Volume of the periodical

12

Issue of the periodical within the volume

22

Country of publishing house

CH - SWITZERLAND

Number of pages

19

Pages from-to

9524

UT code for WoS article

000594552500001

EID of the result in the Scopus database

2-s2.0-85096092342