RESPONSE OF INTERCROPPED SORGHUM AND SOYBEAN TO LEVEL
PHOSPHORUS AND VAM FUNGAL SPECIES1• W. BressaJ; ;.
Siqueira3;
C.A. vasconcellos4•
A .A~.Purcino 5. 2,~
CNPMS/EMBRAPA, CP 151 35701-970, Sete Lagoas, MG. 3. E
Departamento de Ciencia do Solo, CP 37, 37200 Lavras, M~
The response of intercropped
grain sorghum and soybeans~
n
vesicular-arbuscular mycorrhizal (VAM) fungi and levels of
and the identification of the best combination of VAM f
and P leveI were the objectives of this study.
Three ,V
fungi;
GigaspqxB\ '
Glomus etiuiicet.um,
Glomus cIerum,
and
",~t
> " i:Ul>
margarida and five phosphorus leveI (0,25,50,100, 200
were utilized in this experimento Grain sorghum and soybej-l\
inoculated with VAM fungi had significantly (p-0.05) high
':J
plant dry weight (PDW) and grain dry weight (GDW).
Gram~
sorghum PDW was correlated with VAM colonization (r-0.9l**)
,.1.
GDW was also correlated with VAM colonization (r-0.88**) .'"7.~
r.
.1:.1"
levels significantly (p-0.05) affected VAM colonization, PDW>"',
and GDW. A significant interaction (p"0.05) between P levels,;·
.
,
j, ..
~'i
and mycorrhizal species was observed for colonization, PDw,;.~
and GDW.
G. etunicatum was the most effective VAM fungi at,:
.,
).,
alI levels of P, while plants inoculated with G. clarum did
.
J.,' "
not
differ
significantly
from
the controlo
These
data
,1
demonstrated that inoculation with effective VAM fungi c~,
enhance plant growth and biomass production of intercropped'
,:;>
sorghum and soybeans.
1.Trabalho realizado no CNPMS/EMBRAPA, Sete Lagoas,MG.