Annual and Long-Term Changes in N Pools and Fluxes in Field Lysimetric Investigation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F25%3A43926919" target="_blank" >RIV/62156489:43210/25:43926919 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s42729-025-02398-9" target="_blank" >https://doi.org/10.1007/s42729-025-02398-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s42729-025-02398-9" target="_blank" >10.1007/s42729-025-02398-9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Annual and Long-Term Changes in N Pools and Fluxes in Field Lysimetric Investigation

Popis výsledku v původním jazyce

Purpose: Short- and long-term effects of a varying annual rate of nitrogen (N) inputs on plant N uptake and N balance at a constant mean level of fertilization are seldom studied. Applied N may or may not be utilized by crops. This leads to a positive, neutral or negative balance between inputs and outputs. Although the balance could not be exactly determined, it should subsequently change measurable pools or fluxes of N in soil during long-term field investigation. Methods: Influence of varying annual N fertilization rates on soil N pools (soil mineral nitrogen), N fluxes (outputs through plant N uptake and leaching) and balance between inputs and outputs, was studied in a 21-year field lysimetric experiment. We hypothesized that each N input into the soil or loss from the soil changes remaining pools and fluxes of N. We also hypothesized that a long-term deficit decreases, and a surplus increases, soil mineral nitrogen (Nmin), plant N uptake and losses. Results: At given N input rate, the mean annual crop N uptake was higher than the inputs at 7 of 8 locations. An increasing rate of annual N input increased crop N uptake, with only a marginal effect on Nmin concentration and leaching. Conclusions: Results show, that internal soil resources provided up to 100 kg N to annual N uptake and from 100 kg N haMINUS SIGN 1 of annual N input, 40-50 kg N is harvested and the rest of added N is retained in soil and released later, independently on actual rate of input. Despite a negative N balance, long-term changes were limited. The results suggest that non-estimated sources of N help to maintain sustainability of the studied cropping systems.

Název v anglickém jazyce

Annual and Long-Term Changes in N Pools and Fluxes in Field Lysimetric Investigation

Popis výsledku anglicky

Purpose: Short- and long-term effects of a varying annual rate of nitrogen (N) inputs on plant N uptake and N balance at a constant mean level of fertilization are seldom studied. Applied N may or may not be utilized by crops. This leads to a positive, neutral or negative balance between inputs and outputs. Although the balance could not be exactly determined, it should subsequently change measurable pools or fluxes of N in soil during long-term field investigation. Methods: Influence of varying annual N fertilization rates on soil N pools (soil mineral nitrogen), N fluxes (outputs through plant N uptake and leaching) and balance between inputs and outputs, was studied in a 21-year field lysimetric experiment. We hypothesized that each N input into the soil or loss from the soil changes remaining pools and fluxes of N. We also hypothesized that a long-term deficit decreases, and a surplus increases, soil mineral nitrogen (Nmin), plant N uptake and losses. Results: At given N input rate, the mean annual crop N uptake was higher than the inputs at 7 of 8 locations. An increasing rate of annual N input increased crop N uptake, with only a marginal effect on Nmin concentration and leaching. Conclusions: Results show, that internal soil resources provided up to 100 kg N to annual N uptake and from 100 kg N haMINUS SIGN 1 of annual N input, 40-50 kg N is harvested and the rest of added N is retained in soil and released later, independently on actual rate of input. Despite a negative N balance, long-term changes were limited. The results suggest that non-estimated sources of N help to maintain sustainability of the studied cropping systems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40101 - Agriculture

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Soil Science and Plant Nutrition

ISSN

0718-9508

e-ISSN

0718-9516

Svazek periodika

25

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CL - Chilská republika

Počet stran výsledku

11

Strana od-do

4312-4322

Kód UT WoS článku

001456504200001

EID výsledku v databázi Scopus

2-s2.0-105001522120