INVESTIGADORES
CAVIGLIA Octavio Pedro
congresos y reuniones científicas
Título:
Intercropping soybean and maize to silage: II- Optimal row combination to maximize biomass production and silage quality
Autor/es:
DÍAZ, M. G., KUTTEL, W. D., LÓPEZ, R., CAVIGLIA, O.,PELTZER, H.
Lugar:
Beijing, China.
Reunión:
Congreso; World soybean Research Conference VIII; 2009
Resumen:
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Maize silage is
characterized by a considerable high nutritive value with low protein content
and high forage yield. Maize and soybean intercropping could increase silage
quality thorough protein contribution of soybean. The objective was to evaluate
the optimal row combination of maize-soybean intercrop in order to coupling
high biomass production with silage quality in comparison to pure stand.
Soybean and maize were simultaneously sowed at 16 and 4 plants per lineal meter
(0.52m apart), respectively, using genotypes A 7321 RG (MG VII, indeterminate)
and DK Feed RR2 at Paraná, Argentina (31º50S). Treatments
were pure stands of maize M-M-M-M and soybean S-S-S-S and intercrops: M-S-M-S,
M-M-S-S, M-M-M-S and M-S-S-S. Crops were cut at R4 in maize and R5 in soybean.
Contribution of maize ranged from 44 to 74%, and was higher as maize rows
increased. Maize in intercrops had 14-24% more relative biomass yield (RBY)
that pure stand. In contrast soybean in intercrop showed a reduction of RBY
(1-25%) in comparison to pure stand. Land equivalent ratio, a measure of
performance of intercrops in relation to pure stand, not differed among treatments
and ranged 0.99-1.17. Crude protein (CP) increased at a rate of 1.9% as each
rows of soybean was added. Dry matter digestibility (DMD) in intercrops, except
M-M-M-S, was 8 and 16% higher than maize and soybean, respectively. Rows
combinations with 50% of maize had a contribution to biomass up to 70% from
maize, and coupled an increased CP and DMD without a penalty in silage yield in
contrast to pure stand.
