Detail publikace

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

Holatko, Jiri Hammerschmiedt, Tereza Datta, Rahul Baltazar, Tivadar Kintl, Antonin Latal, Oldrich Pecina, Vaclav Sarec, Petr Novak, Petr Balakova, Ludmila Danish, Subhan Zafar-ul-Hye, Muhammad Fahad, Shah Brtnicky, Martin

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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 (C-mic), soil respiration (basal and substrate-induced), enzyme activities, total carbon (C-tot), 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 center dot kg(-1)), the biochar-amended soil (low biochar 32 g center dot kg(-1), high biochar 80 g center dot kg(-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 C-tot and C-mic 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 (C-mic, 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.

Klíčová slova

organic amendment; priming effect; soil dehydrogenase; microbial biomass carbon; respiration; enzymes; plant biomass; soil health

Autoři

Holatko, Jiri; Hammerschmiedt, Tereza; Datta, Rahul; Baltazar, Tivadar; Kintl, Antonin; Latal, Oldrich; Pecina, Vaclav; Sarec, Petr; Novak, Petr; Balakova, Ludmila; Danish, Subhan; Zafar-ul-Hye, Muhammad; Fahad, Shah; Brtnicky, Martin

Vydáno

20. 11. 2020

Nakladatel

MDPI

Místo

BASEL

ISSN

2071-1050

Periodikum

Sustainability

Ročník

12

Číslo

9524

Stát

Švýcarská konfederace

Strany od

1

Strany do

19

Strany počet

19

URL

https://www.mdpi.com/2071-1050/12/22/9524

BibTex

@article{BUT167928,
  author="Holatko, Jiri and Hammerschmiedt, Tereza and Datta, Rahul and Baltazar, Tivadar and Kintl, Antonin and Latal, Oldrich and Pecina, Vaclav and Sarec, Petr and Novak, Petr and Balakova, Ludmila and Danish, Subhan and Zafar-ul-Hye, Muhammad and Fahad, Shah and Brtnicky, Martin",
  title="Humic Acid Mitigates the Negative Effects of High Rates of Biochar Application on Microbial Activity",
  journal="Sustainability",
  year="2020",
  volume="12",
  number="9524",
  pages="1--19",
  doi="10.3390/su12229524",
  issn="2071-1050",
  url="https://www.mdpi.com/2071-1050/12/22/9524"
}