Dual crop coefficient of common bean in Tangará da Serra, Mato Grosso

William Fenner,Cleonir A Faria Júnior,Paulo S L De Freitas,Guilherme Bariviera,Marco A C De Carvalho,Rivanildo Dallacort

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

Abstract

ABSTRACT This study aimed to determine the dual crop coefficient of common bean ( Phaseolus vulgaris L.) for Tangará da Serra-MT, Brazil. The study used the FAO-56 dual kc method, dividing the kc into soil evaporation coefficient (ke), determined in microlysimeters, and basal crop coefficient (kcb), 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 (ETo) 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 kcb values determined for the initial, full development and final stages were 0.32, 1.10 and 0.81, respectively, while for ke, the respective values were 0.85, 0.40 and 0.53.

Highlights

Brazil stands out in the world for its abundance of water resources, for the use in both energy generation and agriculture, through irrigation
The bean producing area in the state of Mato Grosso corresponds to 69% of the entire Brazilian Midwest region and represents a value of approximately 14% of the total national cultivation, considering the sum of the first, second and third seasons
The mean yield in the state is 1,653 kg ha-1, which is below 2,434 kg ha-1, of the Goiás state, and 2,084 kg ha-1, of the Midwest region (CONAB, 2014)

Summary

Introduction

Brazil stands out in the world for its abundance of water resources, for the use in both energy generation and agriculture, through irrigation. According to FAO (2013), Brazil has the third largest potential of irrigation in the world and is only behind India and China. The bean producing area in the state of Mato Grosso corresponds to 69% of the entire Brazilian Midwest region and represents a value of approximately 14% of the total national cultivation, considering the sum of the first, second and third (irrigated) seasons. This state alone produces 535,000 t of bean, which correspond to approximately 61% of the Midwest production and 16% of the total Brazilian production. The mean yield in the state is 1,653 kg ha-1, which is below 2,434 kg ha-1, of the Goiás state, and 2,084 kg ha-1, of the Midwest region (CONAB, 2014)

Objectives

Methods

Results