Intercropping maize and cowpea cultivars: II. Dry grain yield
Palavras-chave:
Zea mays. Vigna unguiculata. Monocrops. Land Equivalent Ratio.Resumo
There is interest in identifying the best maize and cowpea cultivars to be used in monocropped and intercropping
systems for the production of dry grain. In order to meet this interest, two monocrops of cowpea (the traditional varieties,
Corujinha and Sempre Verde) were evaluated with two monocrops of maize (the AG 1051 double hybrid and the AL Bandeirante
variety) and four intercrops (combinations of the cowpea varieties and the maize cultivars). Under the intercropping systems,
the maize and cowpea occupied alternating rows. A completely randomized block design with six replications was used.
Grain growth and yield were higher in the AG 1051 hybrid than in the AL Bandeirante variety in both the monocropped
and intercropping systems. For medium-sized maize grain, the growth and yield were higher in the monocrops than in the
intercrops. It is unimportant which variety of cowpea, Corujinha or Sempre Verde, is used with each maize cultivar in the
intercropping systems, as there was no interaction between the maize cultivars and the cowpea cultivars. In the monocropped
systems, the grain yield of the Corujinha cultivar was greater than that of the Sempre Verde cultivar. Mean grain yield in the
monocrops was greater than in the intercrops. Both cowpea cultivars showed better performance when intercropped with the
AL Bandeirante maize cultivar than with the AG 1051 cultivar. The value of the land equivalent ratio was greater than 1.0 only
for the combination of the AL Bandeirante variety of maize and the Sempre Verde variety of cowpea.
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