Abstract
ABSTRACT In the seed production sector, it is essential to use fast and practical equipment to help decision-making processes. Thus, the use of sensors that can capture information to assist in agriculture has contributed significantly to soybean cultivation worldwide, being used in several stages, whether pre-harvest or post-harvest. Thus, this study aimed to develop a prototype of ethylometer with an MQ-3 sensor and to evaluate its stabilization time when used in soybean seed lots submitted to hypoxia. The research was carried out with 10 lots of soybean seeds from five cultivars (NS 8383 RR, SOY Peso RR, M 8372 IPRO, M8644 IPRO and M8808 IPRO) and was divided into two stages. The first one corresponds to the development of the ethanol measuring equipment with an MQ-3 sensor, and the second one to measurement of the sensor’s stabilization time (3, 6, 9, 12, 15, 18, 21, 24, 27, and 30 s) in soybean seeds submitted to anaerobiosis. The equipment and the MQ-3 sensor showed the stability of average measurement at 16 s after activation. This time is recommended for use of the ethylometer in soybean seeds. Through the MQ-3 sensor, it is possible to efficiently detect ethanol present in the air released by soy seeds during the anaerobic process.
Highlights
Brazil stands out as the world’s largest producer of soybeans, with record grain production in the 2020/2021 harvest of 136 million tons (CONAB, 2021)
This study aimed to develop a prototype of ethylometer with an MQ-3 sensor and to evaluate its stabilization time when used in soybean seed lots submitted to hypoxia
The first corresponded to development of the ethanol measuring equipment and the second to measurement of the stabilization time of the sensor mounted in the equipment
Summary
Brazil stands out as the world’s largest producer of soybeans, with record grain production in the 2020/2021 harvest of 136 million tons (CONAB, 2021). Cavalcante et al (2017, 2019) subjected ryegrass seeds and bean seeds, respectively, to hypoxia and used an adapted ethylometer to measure the amount of ethanol released by the seeds. They correlated their results with traditional vigor tests. To move forward with studies related to the production of ethanol in soybean seeds and its relationship with traditional vigor tests, that have a relatively long analysis time, it is necessary to design new equipment, specific for this test, which uses sensors that allow a reliable reading, in a fast, practical, and accurate way, and would be useful for the soybean seed sector. Any type of sensor needs to be previously calibrated and adjusted according to the needs for which it will be used (González-Buesa & Salvador, 2019)
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