Agronomic performance of rice cultivars under sprinkler and flood-irrigation system

Abstract

Currently, agronomic practices needed to improve the water efficiency use in irrigated rice crops. The study aimed to evaluate rice cultivars in flood and sprinkler-irrigated system with linear pivot. The experiment was conducted at Embrapa, in Capão do Leão, Rio Grande do Sul (31º48’49”S, 52º28’20”W), in 2011/12 and 2013/14 crop season. It was implemented in the permanent flood-irrigation systems with water blade and sprinkler-irrigation system with linear pivot. Were evaluated the genotypes BRS Atalanta, BRS Querência, BRS Pampa, BR IRGA 410, BR IRGA 409, BRS Sinuelo CL, BRS Fronteira, BRS 7 ‘Taim’, BRS Pampeira and AB 10101 CL. The parameters evaluated were: grain yield, days to flowering, plant height and percentage of entire grains after industrial processing. The cultivar BRS Pampa stands out in sprinkler-irrigation, while in the flood-irrigation system the cultivar BRS Pampeira presents greater yield potential. The sprinkler-irrigation system with the linear pivot results in an increase in cycle to flowering, reduction in plant height and a 32% reduction in a grain yield compared to flood-irrigation in irrigated rice.