Microtopography-induced transient waterlogging affects switchgrass (Alamo) growth in the lower coastal plain of North Carolina, USA

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F18%3A00495796" target="_blank" >RIV/86652079:_____/18:00495796 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1111/gcbb.12510" target="_blank" >http://dx.doi.org/10.1111/gcbb.12510</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/gcbb.12510" target="_blank" >10.1111/gcbb.12510</a>

Result language

angličtina

Original language name

Microtopography-induced transient waterlogging affects switchgrass (Alamo) growth in the lower coastal plain of North Carolina, USA

Original language description

Very limited information is currently available on growth responses of switchgrass (lowland cultivars) to transient waterlogging in lowland or poorly drained areas. This study investigated impacts of microtopography-induced transient waterlogging on switchgrass (Alamo cultivar) growth, represented by leaf-level gas exchange and biomass yield, in an established experimental field located in the Atlantic coastal plain of North Carolina, USA. Intensive leaf-level gas exchange measurements were conducted on switchgrass at paired spots with distinct elevations in three sub-blocks. Aboveground biomass was randomly collected across the study field to explore the potential impacts of the transient waterlogging on biomass yield. The sum of excess water (SEW) was calculated based on measured instantaneous water table depth to generalize the relationship between biomass yield and intensity of transient waterlogging. Results showed significant (P0.0001) treatment effects on leaf-level gas exchange, characterized by evident reduction in both CO2 assimilation rate and stomatal conductance when water table was at or near the soil surface at low positions. Negative impacts of transient waterlogging on leaf-level gas exchange became more evident with the increasing of elevation differences between paired subplots. Stomatal closure was found to be the main mechanism responsible for the decline of net assimilation under transient waterlogging. Aboveground biomass yields of switchgrass showed relatively high spatial variability and were positively and linearly correlated with microtopography (represented by elevation in the analysis) (P<0.03, R-2>0.77). Further analysis showed that biomass yields were negatively correlated with SEW (P<0.001, R-2>0.6) with an exponential relationship. Results of this study strongly demonstrated transient waterlogging could negatively affect switchgrass growth by suppressing leaf-level gas exchange rates and ultimately reducing biomass yield. Findings from this study have critical implications for evaluating the economic viability of growing switchgrass on marginal lands that are subject to transient waterlogging stresses.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

40101 - Agriculture

Project

<a href="/en/project/LO1415" target="_blank" >LO1415: CzechGlobe 2020 – Development of the Centre of Global Climate Change Impacts Studies</a><br>

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Global Change Biology Bioenergy

ISSN

1757-1693

e-ISSN

—

Volume of the periodical

10

Issue of the periodical within the volume

8

Country of publishing house

GB - UNITED KINGDOM

Number of pages

15

Pages from-to

577-591

UT code for WoS article

000438498300005

EID of the result in the Scopus database

2-s2.0-85045399584