Impacts of water availability and drought on maize yield – A comparison of 16 indicators

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F17%3A00485343" target="_blank" >RIV/86652079:_____/17:00485343 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/62156489:43210/17:43911223

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.agwat.2017.04.007" target="_blank" >http://dx.doi.org/10.1016/j.agwat.2017.04.007</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.agwat.2017.04.007" target="_blank" >10.1016/j.agwat.2017.04.007</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Impacts of water availability and drought on maize yield – A comparison of 16 indicators

Popis výsledku v původním jazyce

Agricultural drought causes serious yield losses for rainfed crops (including C 4 crops) and is a cause of higher costs incurred by irrigation use. Drought episodes have been more frequent in Central Europe in recent years and have caused problems in terms of crop and livestock production due to a lack of available feed. The main aim of this study is to examine 16 water availability indicators (suitable for the evaluation of agricultural drought) to help explain maize silage yields. A parallel aim is to determine the period during which current maize hybrids for silage are the most vulnerable to water availability shortages. These aims reflect a current need for accurate drought impact assessment methods that can be applied as an early warning system or as part of a decision making protocol. For the purposes of this study, data from rainfed silage maize field experiments conducted between 2011 and 2015 in 4 locations (throughout the Czech Republic) were used. Relatively high correlations were found using precipitation totals for July alone, as this simple indicator explained 64% of the observed variability in the average silage yields of maize. Overall, the highest R 2 (coefficient of determination) of 0.77 was obtained when the sum of actual evapotranspiration (ETa) for May to August was applied as an independent variable. This indicator also gave the most consistent response for all of the individually assessed months. The lowest ETa totals from May to August occurred during an extremely dry year (2015). The significance of this drought episode was exacerbated by its spatial extent and severe impacts on regional maize silage yields throughout the entire Czech Republic. The selection of hybrids according to FAO numbers has not been proven (based on included data) to serve as an adequate adaptation measure for severe episodes of drought, although higher FAO values should provide slightly higher yields in such cases. The recommendation for farmers is not to rely on one hybrid alone, but instead use hybrids with different FAO values for a given year.

Název v anglickém jazyce

Impacts of water availability and drought on maize yield – A comparison of 16 indicators

Popis výsledku anglicky

Agricultural drought causes serious yield losses for rainfed crops (including C 4 crops) and is a cause of higher costs incurred by irrigation use. Drought episodes have been more frequent in Central Europe in recent years and have caused problems in terms of crop and livestock production due to a lack of available feed. The main aim of this study is to examine 16 water availability indicators (suitable for the evaluation of agricultural drought) to help explain maize silage yields. A parallel aim is to determine the period during which current maize hybrids for silage are the most vulnerable to water availability shortages. These aims reflect a current need for accurate drought impact assessment methods that can be applied as an early warning system or as part of a decision making protocol. For the purposes of this study, data from rainfed silage maize field experiments conducted between 2011 and 2015 in 4 locations (throughout the Czech Republic) were used. Relatively high correlations were found using precipitation totals for July alone, as this simple indicator explained 64% of the observed variability in the average silage yields of maize. Overall, the highest R 2 (coefficient of determination) of 0.77 was obtained when the sum of actual evapotranspiration (ETa) for May to August was applied as an independent variable. This indicator also gave the most consistent response for all of the individually assessed months. The lowest ETa totals from May to August occurred during an extremely dry year (2015). The significance of this drought episode was exacerbated by its spatial extent and severe impacts on regional maize silage yields throughout the entire Czech Republic. The selection of hybrids according to FAO numbers has not been proven (based on included data) to serve as an adequate adaptation measure for severe episodes of drought, although higher FAO values should provide slightly higher yields in such cases. The recommendation for farmers is not to rely on one hybrid alone, but instead use hybrids with different FAO values for a given year.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40106 - Agronomy, plant breeding and plant protection; (Agricultural biotechnology to be 4.4)

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>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Agricultural Water Management

ISSN

0378-3774

e-ISSN

—

Svazek periodika

188

Číslo periodika v rámci svazku

JUL

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

126-135

Kód UT WoS článku

000401879600013

EID výsledku v databázi Scopus

2-s2.0-85018723627