Dual crop coefficient of common bean in Tangara Serra, Mato Grosso

作者：Fenner William^*; Dallacort Rivanildo; de Freitas Paulo S L; Faria Junior Cleonir A; de Carvalho Marco A C; Bariviera Guilherme

来源：Revista Brasileira de Engenharia Agricola e Ambiental, 2016, 20(5): 455-460.

DOI：10.1590/1807-1929/agriambi.v20n5p455-460

• Phaseolus vulgaris
• basal crop coefficient
• evaporation coefficient
• irrigation

This study aimed to determine the dual crop coefficient of common bean (Phaseolus vulgaris L.) for Tangara da Serra-MT, Brazil. The study used the FAO-56 dual k(c) method, dividing the k(c) into soil evaporation coefficient (k(e)), determined in microlysimeters, and basal crop coefficient (k(cb)), determined in weighing lysimeters. The study was conducted from July 10 (sowing) to October 6, 2014 (harvest), using the common bean cultivar 'BRS Estilo' and a sprinkler irrigation system with a coefficient of uniformity greater than 80%. The total rainfall and irrigation during the crop cycle (84 days) was 524.8 mm; the potential evapotranspiration (ET0) estimated for the period was 327.9 mm, whereas the crop evapotranspiration (ETc) accumulated during the cycle, determined in lysimeters, was equal to 477.5 mm. The k(cb) values determined for the initial, full development and final stages were 0.32, 1.10 and 0.81, respectively, while for k(e), the respective values were 0.85, 0.40 and 0.53.

• 出版日期2016-5