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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

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

CEP classification

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OECD FORD branch

40101 - Agriculture

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Journal of Soil Science and Plant Nutrition

ISSN

0718-9508

e-ISSN

0718-9516

Volume of the periodical

25

Issue of the periodical within the volume

2

Country of publishing house

CL - CHILE

Number of pages

11

Pages from-to

4312-4322

UT code for WoS article

001456504200001

EID of the result in the Scopus database

2-s2.0-105001522120