Description Usage Arguments Details Value References See Also Examples
Ke
computes the viability constant \mjseqnK_E from the
species-specific temperature coefficients in case of storage experiments
conducted at constant temperature and varying moisture contents. \loadmathjax
1 |
K |
The constant \mjseqnK associated with the relationship of temperature with seed longevity (see Details). |
temp |
Temperature in °C. |
temp.coeff |
The species-specific temperature coefficients (\mjseqnC_H and \mjseqnC_Q) as a numeric vector of length 2. |
From seed storage experiments involving storage of seeds at a constant temperature in a range of moisture contents, the effect of moisture content on seed longevity (\mjseqn\sigma) can be estimated from the following linear relationship:
\mjsdeqn\log\sigma= K - C_w\logm
Where, \mjseqnK is the intercept, \mjseqnC_W is the slope and \mjseqnm is the moisture content.
The constant \mjseqnK associated with the relationship of temperature with seed longevity as follows.
\mjsdeqnK = K_E - C_Ht - C_Qt^2
Where, \mjseqnK_E, \mjseqnC_H and \mjseqnC_Q are the species-specific seed viability constants.
The constant \mjseqnK_E can be estimated from the universal temperature constants (\mjseqnC_H = 0.0329 and \mjseqnC_Q = 0.000478) in case of seed storage experiments at constant temperature and varying moisture content as follows.
\mjsdeqnK_E = K + C_Ht + C_Qt^2
The value of species-specific seed viability constant \mjseqnK_E.
ellis_improved_1980viabilitymetrics
\insertRefpritchard_predicting_2003viabilitymetrics
1 | Ke(36, 10)
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