Base temperature, cycle duration, and thermal constant for yacon culture
Yacon is a perennial herbaceous plant that naturally occurs in South America at altitudes ranging from 2,000 m to 3,100 m above sea level. The yacon culture has recently grown in popularity as it has high productive potential in mild climates and multiple benefits to human health. This study aimed...
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| Format: | Article |
| Language: | English |
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Eduem (Editora da Universidade Estadual de Maringá)
2021-12-01
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| Series: | Acta Scientiarum: Agronomy |
| Subjects: | |
| Online Access: | https://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/52623 |
| _version_ | 1819278206011703296 |
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| author | Ramon Amaro de Sales Evandro Chaves de Oliveira Alexandre Cândido Xavier Fábio Luiz de Oliveira José Eduardo Macedo Pezzopane Diego Mathias Natal da Silva Sávio da Silva Berilli |
| author_facet | Ramon Amaro de Sales Evandro Chaves de Oliveira Alexandre Cândido Xavier Fábio Luiz de Oliveira José Eduardo Macedo Pezzopane Diego Mathias Natal da Silva Sávio da Silva Berilli |
| author_sort | Ramon Amaro de Sales |
| collection | DOAJ |
| description |
Yacon is a perennial herbaceous plant that naturally occurs in South America at altitudes ranging from 2,000 m to 3,100 m above sea level. The yacon culture has recently grown in popularity as it has high productive potential in mild climates and multiple benefits to human health. This study aimed to determine the lower and upper base temperatures, cycle duration, and thermal constant for the yacon culture, based on phenological data from field experiments that were carried out during three growing seasons (fall, winter, and spring) in 2013. The experiments were conducted in the municipality of Ibatiba in the state of Espírito Santo, Brazil, in a randomized block design with four replicates. The lower base temperature was determined using methods of the lowest standard deviation in days and degree-days, relative development, and variation coefficient in degree-days for two subperiods: emergence to maturation, and onset of tuberization to maturation. The upper base temperature was determined by the standard deviation and coefficient of variation methods, both in degrees-days. The relationship between meteorological elements and the onset of tuberization was also investigated. The lower base temperature values determined for yacon were 12.5ºC in the two subperiods studied with a base temperature above 34.0ºC. The productivity of these tuberous roots was higher in the fall because of the longer cycle, lower temperature, and lower photoperiod. In turn, a higher thermal sum was needed to initiate tuberization with the delay of planting.
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| first_indexed | 2024-12-24T00:08:19Z |
| format | Article |
| id | doaj.art-a2c98b83a3164b98a7ae14bfad9e18ad |
| institution | Directory Open Access Journal |
| issn | 1679-9275 1807-8621 |
| language | English |
| last_indexed | 2024-12-24T00:08:19Z |
| publishDate | 2021-12-01 |
| publisher | Eduem (Editora da Universidade Estadual de Maringá) |
| record_format | Article |
| series | Acta Scientiarum: Agronomy |
| spelling | doaj.art-a2c98b83a3164b98a7ae14bfad9e18ad2022-12-21T17:24:57ZengEduem (Editora da Universidade Estadual de Maringá)Acta Scientiarum: Agronomy1679-92751807-86212021-12-0144110.4025/actasciagron.v44i1.52623Base temperature, cycle duration, and thermal constant for yacon culture Ramon Amaro de Sales0Evandro Chaves de Oliveira1Alexandre Cândido Xavier2Fábio Luiz de Oliveira3José Eduardo Macedo Pezzopane4Diego Mathias Natal da Silva5Sávio da Silva Berilli6Universidade Federal de ViçosaInstituto Federal de Educação, Ciência e Tecnologia do Espírito SantoUniversidade Federal do Espírito SantoUniversidade Federal do Espírito SantoUniversidade Federal do Espírito SantoInstituto Federal de Educação, Ciência e Tecnologia do Sudeste de Minas GeraisInstituto Federal de Educação, Ciência e Tecnologia do Espírito Santo Yacon is a perennial herbaceous plant that naturally occurs in South America at altitudes ranging from 2,000 m to 3,100 m above sea level. The yacon culture has recently grown in popularity as it has high productive potential in mild climates and multiple benefits to human health. This study aimed to determine the lower and upper base temperatures, cycle duration, and thermal constant for the yacon culture, based on phenological data from field experiments that were carried out during three growing seasons (fall, winter, and spring) in 2013. The experiments were conducted in the municipality of Ibatiba in the state of Espírito Santo, Brazil, in a randomized block design with four replicates. The lower base temperature was determined using methods of the lowest standard deviation in days and degree-days, relative development, and variation coefficient in degree-days for two subperiods: emergence to maturation, and onset of tuberization to maturation. The upper base temperature was determined by the standard deviation and coefficient of variation methods, both in degrees-days. The relationship between meteorological elements and the onset of tuberization was also investigated. The lower base temperature values determined for yacon were 12.5ºC in the two subperiods studied with a base temperature above 34.0ºC. The productivity of these tuberous roots was higher in the fall because of the longer cycle, lower temperature, and lower photoperiod. In turn, a higher thermal sum was needed to initiate tuberization with the delay of planting. https://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/52623Smallanthus sonchifolius; phenology; degree days; photoperiod. |
| spellingShingle | Ramon Amaro de Sales Evandro Chaves de Oliveira Alexandre Cândido Xavier Fábio Luiz de Oliveira José Eduardo Macedo Pezzopane Diego Mathias Natal da Silva Sávio da Silva Berilli Base temperature, cycle duration, and thermal constant for yacon culture Acta Scientiarum: Agronomy Smallanthus sonchifolius; phenology; degree days; photoperiod. |
| title | Base temperature, cycle duration, and thermal constant for yacon culture |
| title_full | Base temperature, cycle duration, and thermal constant for yacon culture |
| title_fullStr | Base temperature, cycle duration, and thermal constant for yacon culture |
| title_full_unstemmed | Base temperature, cycle duration, and thermal constant for yacon culture |
| title_short | Base temperature, cycle duration, and thermal constant for yacon culture |
| title_sort | base temperature cycle duration and thermal constant for yacon culture |
| topic | Smallanthus sonchifolius; phenology; degree days; photoperiod. |
| url | https://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/52623 |
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