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@ARTICLE{Hussain:203407,
author = {Hussain, Khalid and Wongleecharoen, Chalermchart and
Hilger, Thomas and Vanderborght, Jan and Garré, Sarah and
Onsamrarn, Wattanai and Sparke, Marc-André and Diels, Jan
and Kongkaew, Thanuchai and Cadisch, Georg},
title = {{C}ombining δ13{C} measurements and {ERT} imaging:
improving our understanding of competition at the
crop-soil-hedge interface},
journal = {Plant and soil},
volume = {393},
number = {1-2},
issn = {1573-5036},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V},
reportid = {FZJ-2015-05350},
pages = {1 - 20},
year = {2015},
abstract = {Hedgerow cropping decreases erosion in hillside agriculture
but also competes for water and nutrients with crops. This
study combined two methods for an improved understanding of
water and nutrient competition at the crop-soil-hedge
interface.δ13C isotopic discrimination in plants and soil
electrical resistivity tomography (ERT) imaging were used in
a field trial with maize monocropping (MM) vs. leucaena
hedgerow intercropping with and without fertilizer (MHF+ and
MHF−) in Thailand.Hedges significantly reduced maize grain
yield and aboveground biomass in rows close to hedgerows.
ERT revealed water depletion was stronger in MM than in MHF+
and MHF- confirming time domain reflectometry and leaf area
data. In MHF+, water depletion was higher in maize rows
close to the hedge compared to rows distant to hedges and
maize grain δ13C was significantly less negative in rows
close to hedges (-10.33‰) compared to distant ones
(-10.64‰). Lack of N increased grain δ13C in MHF-
(-9.32‰, p ≤ 0.001). Both methods were correlated
with each other (r = 0.66, p ≤ 0.001). Combining
ERT with grain δ13C and $\%N$ allowed identifying that
maize growth close to hedges was limited by N and not by
water supply.Combining ERT imaging and 13C isotopic
discrimination approaches improved the understanding of
spatial-temporal patterns of competition at the
hedge-soil-crop interface and allowed distinguishing between
water and N competition in maize based hedgerow systems.},
cin = {IBG-3},
ddc = {570},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000358666600001},
doi = {10.1007/s11104-015-2455-z},
url = {https://juser.fz-juelich.de/record/203407},
}