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Application of organic carbon affects mineral nitrogen uptake by winter wheat and leaching in subsoil: Proximal sensing as a tool for agronomic practice
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SYSNO ASEP 0523938 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Application of organic carbon affects mineral nitrogen uptake by winter wheat and leaching in subsoil: Proximal sensing as a tool for agronomic practice Author(s) Holub, Petr (UEK-B) RID, ORCID, SAI
Klem, Karel (UEK-B) RID, ORCID, SAI
Tůma, I. (CZ)
Vavříková, J. (CZ)
Surá, Kateřina (UEK-B) RID, SAI, ORCID
Veselá, Barbora (UEK-B) SAI, RID
Urban, Otmar (UEK-B) RID, ORCID, SAI
Záhora, J. (CZ)Number of authors 8 Article number 137058 Source Title Science of the Total Environment. - : Elsevier - ISSN 0048-9697
Roč. 717, MAY 15 2020 (2020)Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords long-term tillage ; chlorophyll content ; vegetation indexes ; remote estimation ; n fertilizer ; soil ; reflectance ; crop ; management ; dynamics ; Ammonium ; Crop ; Grain yield ; Nitrates ; Protein content ; Vegetation index Subject RIV EH - Ecology, Behaviour OECD category Ecology R&D Projects EF16_019/0000797 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CzeCOS III - 90123 - Ústav výzkumu globální změny AV ČR, v. v. i. Method of publishing Limited access Institutional support UEK-B - RVO:86652079 UT WOS 000519994800011 EID SCOPUS 85079199657 DOI 10.1016/j.scitotenv.2020.137058 Annotation We tested the hypothesis that application of stable forms of organic carbon (C) into the soil reduces leaching of nitrogen (N). We also examined the potential to estimate N leaching employing N-sensitive spectral reflectance indices. During three growing seasons 2013-2015, field experiment at two experimental sites combining application of distinct N doses (0 (N-0), 35 (N-35), 70 (N-70), and 140 (N-140) kg N ha(-1)) and two stable forms of organic C (lignohumate and compost) was established to measure N uptake by winter wheat and its leaching to subsoil layers. The spectral reflectance al canopy level was measured simultaneously with N content in leaf dry matter at the beginning of the grain filling phase. At full maturity, the above-ground biomass, grain yield, and grain protein content were evaluated. That data was used to calculate N uptake in grain. The N-140 dose led to increased N uptake by grain of 64% and 73% in the wetter years 2013 and 2014, respectively, and even by 118% in the drier year 2015 in comparison with the N-0 treatment. N leaching to subsoil increased substantially with higher N close, but only in wetter years 2013 (by 74%) and 2014 (by 87%). By contrast, no effect of N dose on leached N was found in the dry year 2015. The application of organic C along with the N-140 dose substantially reduced N leaching by 26% and 29% in 2014 and 2015, respectively. Moreover, we demonstrated that normalized red-edge spectral reflectance index (NRERI) is able to predict N uptake by wheat and it can serve as an indicator of N leaching in heavy-rainfall years. Our results thus point towards possible agronomic practices and use of remote-sensing techniques to reduce groundwater contamination by N-based fertilizers. (C) 2020 Elsevier B.V. All rights reserved. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2021 Electronic address https://www.sciencedirect.com/science/article/pii/S0048969720305684?via%3Dihub
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