Basal Temperature and Thermal Constant for the Production of Cacao Tree Seedlings

Posse, Robson Prucoli; Valani, Francielly; Souza, Carlos Alberto Spaggiari; Posse, Sheila Cristina Prucoli; Sales, Ramon Amaro de; Oliveira, Evandro Chaves de; Quartezani, Waylson Zancanella; Leite, Marta Cristina Teixeira

doi:10.9734/jeai/2018/43321

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…One way to evaluate the effect of air temperature and the degree of development of a species is to use the thermal sum or degree day (DD), assuming that base temperatures control the growth and development of the crop (Posse et al, 2018). The concept of a DD is a simple way to quantify the energy available to the plant assuming there are minimum and maximum temperatures capable to cease development and may even cause disturbances to plant tissues.…”

Section: Introductionmentioning

confidence: 99%

Base temperature, cycle duration, and thermal constant for yacon culture

et al. 2021

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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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Section: Introductionmentioning

confidence: 99%

Base temperature, cycle duration, and thermal constant for yacon culture

et al. 2021

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Understanding the Temperature Range for Foliar Development of Neotropical Forest Species during the Seedling Stage: Implications for Biology and Ecology

Araújo,

Martins,

Lyra

et al. 2023

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This study aimed to estimate the cardinal temperatures for the foliar development of seedlings from four forest species native to Brazilian biomes: Handroanthus heptaphyllus, Tabebuia roseoalba, Ceiba speciosa, and Schinus terebinthifolia. An experiment was conducted with ten sowing times between December 2019 and April 2021. Seven methods were employed to estimate the inferior cardinal temperature, the phyllochron concept for the optimal temperature, and mathematical models for the superior temperature. The results indicated significant variations in the inferior cardinal temperatures among the four species, ranging from 9.8°C to 11.5°C, as well as distinct optimal temperatures ranging from 22.7°C to 25.7°C. Furthermore, disparities were observed between species and sowing times concerning the determination of the phyllochron, with Ceiba speciosa exhibiting an average phyllochron ranging from 75.6 to 246.2 ºday-1. These findings offer valuable insights into the biological and ecological aspects of native forest species and enhance our understanding of key parameters for modeling vegetal growth. However, the limited availability of species-specific information in the Brazilian biome raises concerns regarding the applicability of these models. In conclusion, this study successfully estimates the cardinal temperatures (inferior, optimal, and superior) for foliar development of four important forest species native to Brazilian biomes, thereby contributing to the knowledge base of forestry research.

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Basal Temperature and Thermal Constant for the Production of Cacao Tree Seedlings

Cited by 2 publications

References 9 publications

Base temperature, cycle duration, and thermal constant for yacon culture

Base temperature, cycle duration, and thermal constant for yacon culture

Understanding the Temperature Range for Foliar Development of Neotropical Forest Species during the Seedling Stage: Implications for Biology and Ecology

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