Relative growth rate
Encyclopedia
Relative growth rate is a measure used in plant physiology
to quantify the speed of plant growth. It is measured as the mass increase per aboveground biomass per day, for example as g g-1 d-1. It is considered to be the most widely used way of estimating plant growth, but has been criticised as calculations typically involve the destructive harvest of plants.
RGR is calculated using the following equation:
RGR = (ln W2 - ln W1)/(t2-t1)
Where:
ln = natural logarithm
t1 = time one (in days)
t2 = time two (in days)
W1 = Dry weight of plant at time one (in grams)
W2 = Dry weight of plant at time two (in grams)
Plant physiology
Plant physiology is a subdiscipline of botany concerned with the functioning, or physiology, of plants. Closely related fields include plant morphology , plant ecology , phytochemistry , cell biology, and molecular biology.Fundamental processes such as photosynthesis, respiration, plant nutrition,...
to quantify the speed of plant growth. It is measured as the mass increase per aboveground biomass per day, for example as g g-1 d-1. It is considered to be the most widely used way of estimating plant growth, but has been criticised as calculations typically involve the destructive harvest of plants.
RGR is calculated using the following equation:
RGR = (ln W2 - ln W1)/(t2-t1)
Where:
ln = natural logarithm
Natural logarithm
The natural logarithm is the logarithm to the base e, where e is an irrational and transcendental constant approximately equal to 2.718281828...
t1 = time one (in days)
t2 = time two (in days)
W1 = Dry weight of plant at time one (in grams)
W2 = Dry weight of plant at time two (in grams)