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@ARTICLE{DossouYovo:810191,
author = {Dossou-Yovo, Elliott Ronald and Brüggemann, Nicolas and
Ampofo, Edward and Igue, Attanda Mouinou and Jesse, Naab and
Huat, Joël and Agbossou, Euloge Kossi},
title = {{C}ombining no-tillage, rice straw mulch and nitrogen
fertilizer application to increase the soil carbon balance
of upland rice field in northern {B}enin},
journal = {Soil $\&$ tillage research},
volume = {163},
issn = {0167-1987},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2016-03059},
pages = {152 - 159},
year = {2016},
abstract = {Agricultural management practices are frequently non
conservative and can lead to substantial loss of soil
organic carbon and soil fertility, but for many regions in
Africa the knowledge is very limited. To study the effect of
local agricultural practices on soil organic carbon content
and to explore effective ways to increase soil carbon
storage, field experiments were conducted on an upland rice
soil (Lixisol) in northern Benin in West Africa. The
treatments comprised two tillage systems (no-tillage, and
manual tillage), two rice straw managements (no rice straw,
and rice straw mulch at 3 Mg ha−1) and three nitrogen
fertilizer levels (no nitrogen, 60 kg ha−1, 120 kg
ha−1). Phosphorus and potassium fertilizers were applied
to be non-limiting at 40 kg P2O5 ha−1 and 40 kg K2O ha−1
per cropping season. Heterotrophic respiration was higher in
manual tillage than no-tillage, and higher in mulched than
in non-mulched treatments. Under the current management
practices (manual tillage, with no residue and no nitrogen
fertilization) in upland rice fields in northern Benin, the
carbon added as aboveground biomass and root biomass was not
enough to compensate for the loss of carbon from organic
matter decomposition, rendering the upland rice fields as
net sources of atmospheric CO2. With no-tillage, 3 Mg ha−1
of rice straw mulch and 60 kg N ha−1, the soil carbon
balance was approximately zero. With no other changes in
management practices, an increase in nitrogen level from 60
kg N ha−1 to 120 kg N ha−1 resulted in a positive soil
carbon balance. Considering the high cost of inorganic
nitrogen fertilizer and the potential risk of soil and air
pollution often associated with intensive fertilizer use,
implementation of no-tillage combined with application of 3
Mg ha−1 of rice straw mulch and 60 kg N ha−1 could be
recommended to the smallholder farmers to compensate for the
loss of carbon from organic matter decomposition in upland
rice fields in northern Benin.},
cin = {IBG-3},
ddc = {630},
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:000381834000017},
doi = {10.1016/j.still.2016.05.019},
url = {https://juser.fz-juelich.de/record/810191},
}