Influence of inoculation and phosphorus regimes on symbiotic nitrogen fixation and phosphorus use efficiency of Algerian cowpea (Vigna unguiculata L. (Walp.)) landraces
Laen...
Kuupäev
2018
Kättesaadav alates
Autorid
Benlahrech, S.
Kac, G.
Teffahi, M.
Ounane, S.M.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
To study the genotypic variation of cowpeas on plant growth and phosphorus (P)
uptake which is a function of different P regimes in the soil rhizosphere
,
6 landraces of cowpea
commonly found in northern
Algeria (
NE4, NE10, NE11, NKT5, NKT7, NKB7
) and 4 landraces
from Sahara in southern Algeria
(NAG4, NAG5, NAT2 and ND3) were studied during 2013
–
2014 in greenhouse. They were inoculated with
Mesorhizobium sp.
(S1),
Bradyrhizobium sp.
(S2)
and co
–
inoculation
(S1
–
S2)
under three P treatments:
no P supply (P0), soluble P (PP) and
insoluble P (TCP). Only varieties commonly found in northern Algeria nodulated with soluble P
(PP) and inoculation containing
Mesorhizobium
sp
. (S1). As a result of the symbiosis, the
use of
S1 has significantly increased shoot dry weight by 22%, total P content by 20% and P use
efficiency for symbiotic nitrogen fixation by 18% compared to no inoculation (T).
The landraces
from the northern of Algeria expressed a higher growth than
those from Sahara in the south of
Algeria, especially three of them (NE4, NE10 and NE11) who showed a high performance under
all P regimes. We suggest that these three landraces may be useful for improving symbiotic
nitrogen fixation in cowpeas when growth
is limited by low
–
P soils and that they could contribute
to sustainable farming systems through reduction of farm
er’s dependence on fertilizers.
Kirjeldus
Article
Märksõnad
cowpea, landraces, nitrogen fixation, phosphorus, rhizobia, symbiosis, articles