Evapotranspiration from Irrigated Mungo Bean Cropping in The Cerrado Region of Mato Grosso

Abstract

Objective: The objective of this study was to calculate the evapotranspiration of irrigated mung bean crops in the Cerrado region of Mato Grosso. Theoretical Frame: This research used the following main citations as a theoretical basis: Brazilian Agricultural Research Corporation (EMBRAPA) for the methodology for classifying soil characteristics; and Guan et al. (2015) using the water use efficiency methodology. Method: The study was carried out from April to June 2023 at the State University of Mato Grosso (UNEMAT), in Nova Mutum – MT. Each experimental unit consisted of a lysimeter with 18 L of volume, spaced 0.40 m between rows and 0.05 m between plants, with a total of 12 experimental plots. Irrigation management was carried out daily considering irrigation volume, precipitation and drainage. Variables analyzed: crop evapotranspiration, water use efficiency and grain productivity. Scatterplots and Boxplot (descriptive statistics) were created for a better analysis of the results obtained. Results and Conclusions: The total evapotranspiration of the mung bean crop was 521.10 mm during 50 days of cultivation and the daily average was 10.63 mm. Grain productivity for mung bean cultivation in the soil and climate conditions of Mato Grosso was 5,325 kg per hectare. The water use efficiency of mung beans in the Cerrado of Mato Grosso was 1.66 kg of grains per m3 of water. The results of this study provide knowledge about the water consumption of mung beans and serve as a basis for irrigation management by bean producers in the Cerrado region of Mato Grosso. Implications of the research: The results achieved with this study are of great relevance for the purposes of the Department of Agricultural Engineering of the State University of Mato Grosso, Nova Mutum Campus, as well as for the academic and scientific community and producers in the Cerrado region of Mato Grosso who aim to cultivate irrigated mung beans. Originality and value: This research aimed to disseminate to the academic and scientific community and producers of Cerrado Mato-Grossense the need for water required by the Mungo bean crop throughout the cultivation cycle, in which this information will serve as a basis for agricultural planning in the region, such as: volume of water needed to cultivate mung beans aiming for maximum productivity, savings on water, electricity and labor.