Leaf chlorophyll and nitrogen dynamics and their relationship to lowland rice yield for site-specific paddy management

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F17%3A43895542" target="_blank" >RIV/60076658:12520/17:43895542 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41210/17:74676

Result on the web

<a href="https://doi.org/10.1016/j.inpa.2017.08.002" target="_blank" >https://doi.org/10.1016/j.inpa.2017.08.002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.inpa.2017.08.002" target="_blank" >10.1016/j.inpa.2017.08.002</a>

Result language

angličtina

Original language name

Leaf chlorophyll and nitrogen dynamics and their relationship to lowland rice yield for site-specific paddy management

Original language description

The optimum rate and application timing of Nitrogen (N) fertilizer are crucial in achieving a high yield in rice cultivation; however, conventional laboratory testing of plant nutrients is time-consuming and expensive. To develop a site-specific spatial variable rate application method to overcome the limitations of traditional techniques, especially in fields under a double-cropping system, this study focused on the relationship between Soil Plant Analysis Development (SPAD) chlorophyll meter readings and N content in leaves during different growth stages to introduce the most suitable stage for assessment of crop N and prediction of rice yield. The SPAD readings and leaf N content were measured on the uppermost fully expanded leaf at panicle formation and booting stages. Grain yield was also measured at the end of the season. The analysis of variance, variogram, and kriging were calculated to determine the variability of attributes and their relationship, and finally, variability maps were created. Significant linear relationships were observed between attributes, with the same trends in different sampling dates; however, accuracy of semivariance estimation reduces with the growth stage. Results of the study also implied that there was a better relationship between rice leaf N content (R2 = 0.93), as well as yield (R2 = 0.81), with SPAD readings at the panicle formation stage. Therefore, the SPAD-based evaluation of N status and prediction of rice yield is more reliable on this stage rather than at the booting stage. This study proved that the application of SPAD chlorophyll meter paves the way for real-time paddy N management and grain yield estimation. It can be reliably exploited in precision agriculture of paddy fields under double-cropping cultivation to understand and control spatial variations.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

20201 - Electrical and electronic engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

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

Name of the periodical

Information Processing in Agriculture

ISSN

2214-3173

e-ISSN

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Volume of the periodical

4

Issue of the periodical within the volume

4

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

259-268

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-85032176882