Digestate Application on Grassland: Effects of Application Method and Rate on GHG Emissions and Forage Performance

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41310%2F25%3A101767" target="_blank" >RIV/60460709:41310/25:101767 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00027006:_____/25:10178073 RIV/26788462:_____/25:N0000051 RIV/62156489:43210/25:43927661

Výsledek na webu

<a href="https://www.mdpi.com/2073-4395/15/5/1243" target="_blank" >https://www.mdpi.com/2073-4395/15/5/1243</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/agronomy15051243" target="_blank" >10.3390/agronomy15051243</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Digestate Application on Grassland: Effects of Application Method and Rate on GHG Emissions and Forage Performance

Popis výsledku v původním jazyce

The application of digestate as a fertilizer offers a promising alternative to synthetic inputs on permanent grasslands, with benefits for productivity and environmental performance. This four-year study evaluated the impact of two digestate application methods—disc injection (I) and band spreading (S)—combined with four dose variants (0, 20, 40, and 80 m3·ha-1), including split-dose strategies. Emissions of ammonia (NH3), carbon dioxide (CO2), and methane (CH4) were measured using wind tunnel systems immediately after application. Vegetation status was assessed via Sentinel-2-derived Normalized Difference Vegetation Index, Normalized Difference Water Index, and Modified Soil Adjusted Vegetation Index, and agronomic performance through dry matter yield (DMY), net energy for lactation (NEL), and relative feed value (RFV). NH3 and CO2 emissions increased proportionally with digestate dose, while CH4 responses suggested a threshold effect, but considering solely the disc injection, CH4 flux did not increase markedly with higher application rates. Disc injection resulted in significantly lower emissions of the monitored fluxes than band spreading. The split-dose I_40+40 variant achieved the highest DMY (3.57 t·ha-1) and improved forage quality, as indicated by higher NEL values. The control variant (C, no fertilization) had the lowest yield and NEL. These results confirm that subsurface digestate incorporation in split doses can reduce emissions while supporting yield and forage quality. Based on the findings, disc injection at 40+40 m3·ha-1 is recommended as an effective option for reducing emissions and maintaining productivity in managed grasslands.

Název v anglickém jazyce

Digestate Application on Grassland: Effects of Application Method and Rate on GHG Emissions and Forage Performance

Popis výsledku anglicky

The application of digestate as a fertilizer offers a promising alternative to synthetic inputs on permanent grasslands, with benefits for productivity and environmental performance. This four-year study evaluated the impact of two digestate application methods—disc injection (I) and band spreading (S)—combined with four dose variants (0, 20, 40, and 80 m3·ha-1), including split-dose strategies. Emissions of ammonia (NH3), carbon dioxide (CO2), and methane (CH4) were measured using wind tunnel systems immediately after application. Vegetation status was assessed via Sentinel-2-derived Normalized Difference Vegetation Index, Normalized Difference Water Index, and Modified Soil Adjusted Vegetation Index, and agronomic performance through dry matter yield (DMY), net energy for lactation (NEL), and relative feed value (RFV). NH3 and CO2 emissions increased proportionally with digestate dose, while CH4 responses suggested a threshold effect, but considering solely the disc injection, CH4 flux did not increase markedly with higher application rates. Disc injection resulted in significantly lower emissions of the monitored fluxes than band spreading. The split-dose I_40+40 variant achieved the highest DMY (3.57 t·ha-1) and improved forage quality, as indicated by higher NEL values. The control variant (C, no fertilization) had the lowest yield and NEL. These results confirm that subsurface digestate incorporation in split doses can reduce emissions while supporting yield and forage quality. Based on the findings, disc injection at 40+40 m3·ha-1 is recommended as an effective option for reducing emissions and maintaining productivity in managed grasslands.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40101 - Agriculture

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Agronomy

ISSN

2073-4395

e-ISSN

2073-4395

Svazek periodika

15

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

23

Strana od-do

—

Kód UT WoS článku

001495861200001

EID výsledku v databázi Scopus

2-s2.0-105006410690