Behavior of azuki beans at different planting times in Coimbra and Vicosa, state of Minas Gerais

Vieira, R.F.; Vieira, C.; Moura, W. de M.

Revista Ceres 47(272): 411-420

2000


ISSN/ISBN: 0034-737X
Accession: 003368505

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Abstract
Eight yield trials were carried out to study the behaviour of azuki beans (Vigna angularis) in Coimbra and Vicosa, Minas Gerais, with different sowing dates. Ten cultivars were tested: eight of determinate growth habit (Coimbra, M-127, Dainagon, 40037, 70009, 70010, Jaboticatubas, and Ceasa) and two of indeterminate growth habit (UFV and Leopoldina). Common bean [Phaseolus vulgaris] cv. Ouro Negro or Meia Noite was also included in the trials for comparison. The trials were established in February (one), April (two), August (one), November (three), and December (one). The trials sown in February, April, and August were irrigated. The plants were short, life cycle was long, and yield was low when azuki was sown in April. In the other sowing dates, life cycle varied from 62 to 82 days for the determinate cultivars and from 82 to 94 days for cv. Leopoldina. Cultivar UFV was day length sensitive when sown in November, flowering only in February. Average yields of 1038-1986 kg/ha were attained when azuki was sown in November or February. The highest mean yield was given when sown in August (2342 kg/ha), and cv. 70010 gave the maximum yield (2649 kg/ha). One hundred-seed weight varied from 10.2 to 12.6 g when azuki was sown in November or December, and from 13.0 to 15.3 g with the other sowing dates. Cultivar Coimbra had the highest average yield, kept fewer green leaves at harvest time, and was among the more resistant to lodging.