THERMAL TIME FOR REPRODUCTIVE PHENOLOGICAL STAGES OF PINEAPPLE GUAVA (Acca sellowiana (O. Berg) Burret)

Parra-Coronado, Alfonso; Fischer, Gerhard; Chaves-Córdoba, Bernardo

doi:10.15446/abc.v20n1.43390

Cited by 22 publications

(30 citation statements)

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“…There are several methods for calculating GDD, but the most common is to obtain the mean of the daily maximum and minimum temperatures, subtract the Bt, and add the values obtained (Parra-Coronado et al 2015b). The GDD method is the most appropriate for describing growth and development because it is independent of year and environment (Ritchie and Ne Smith 1991).…”

Section: Estimation Of Thermal Timementioning

confidence: 99%

“…The GDD method is the most appropriate for describing growth and development because it is independent of year and environment (Ritchie and Ne Smith 1991). According to Parra-Coronado et al (2015b), the Bt value below which phenological development stops must be identified to use GDD. For pineapple guava, Parra-Coronado et al (2015b) indicate that the B t value estimated for fruit growth is 1.76 °C.…”

Section: Estimation Of Thermal Timementioning

confidence: 99%

“…According to Parra-Coronado et al (2015b), the Bt value below which phenological development stops must be identified to use GDD. For pineapple guava, Parra-Coronado et al (2015b) indicate that the B t value estimated for fruit growth is 1.76 °C. The thermal time was calculated as the daily sum of the difference between the mean temperature and Bt for each stage (Parra-Coronado et al 2015b): where: TT is the thermal time (GDD) accumulated during n days of fruit growth; T i is the average daily temperature (°C) for the i-th day.…”

Section: Estimation Of Thermal Timementioning

confidence: 99%

“…"Solver is an iterative non-linear procedure that performs the first estimation with the initial values assigned to the parameters in the equation, and those values are increased or decreased until the lowest value of the sum of the square of the deviations is obtained" (Parra-Coronado et al 2015b).…”

Section: Model Evaluationsmentioning

confidence: 99%

“…According to Parra-Coronado et al (2015b), the method most frequently used is the cumulative mean daily temperature above a base temperature (Bt); this parameter is also known as thermal or physiological time, units of heat or growing degree days (GDD) or development, which is defined as the number of degree days required until a certain developmental process or phenological phase is complete (Trudgill et al 2005). GDD is used to estimate the growth and development of fruits, calculate the rate of appearance of different plant organs (Almanza et al 2010), and estimate potential yield (Salazar et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Model of pre-harvest quality of pineapple guava fruits (Acca sellowiana (O. berg) burret) as a function of weather conditions of the crops

2017

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that altitude, growing degree days, and accumulated precipitation are the weather variables with the highest influence on the physicochemical characteristics of the fruit during growth. The models of fresh weight, total titratable acidity, and skin firmness better predict the development of fruit quality during growth and development. Equations were obtained for increases of length and diameter as a function of fruit weight and for days from anthesis as a function of growing degree days and altitude. The regression analysis parameters showed that the models adequately predicted the fruit characteristics during growth for both localities, and a cross-validation analysis showed a good statistical fit between the estimated and observed values.

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Section: Estimation Of Thermal Timementioning

confidence: 99%