Låga växter, mikroberna i marken och markens funktioner i allmänhet drar under vintern nytta av.
Välj ett alternative.
de låga temperaturerna
den ringa mängden solljus
trädens långsammare aktivitet
snöns isolerande inverkan
When there is low soil moisture, plants close its stomata pores which then decreases photosynthesis.
Leaf area increases with stand age, resulting in a decreasing rate of photosynthesis in the stand.
An increment in leaf area increases also the photosynthesis of a tree stand. However, the relationship is saturating.
Photoinhibition means the decrease in photosynthesis due to
exposure to high temperature.
exposure to excess of CO2.
exposure to excess of light.
exposure to shortage of soil moisture.
Photosynthesis of a shoot can be measured by enclosing it within a chamber and following the change of
air temperature in this chamber.
carbon dioxide concentration in the air of this chamber.
water vapour concentration in the air of this chamber.
PAR radiation next to the chamber.
"Stage of acclimation" refers to the seasonality of
the photosynthetic activity.
the growth activity.
the flowering activity.
the litter fall activity.
Photosynthesis shuts down if the temperature of previous night has been lower than
The stage of acclimation at any given day depends on the temperatures experienced by the plant during the previous months.
The stage of acclimation at any given day depends on the temperatures experienced by the plant during the previous days.
In trees, approximately half of the carbon bound in photosynthesis is used for construction of new biomass.
REW stands for "Relative Extractable Water"
The effect of light on photosynthesis has a clear saturating pattern: more light results in more photosynthesis but eventually leaves cannot take full advantage of all the extra light.
Eftersom koldioxid kommer in i växten genom klyvöppningarna går assimilationen långsammare då klyvöppningarna tillsluts.
High soil moisture leads to decreased photosynthesis.
In boreal upland forests, low soil moisture decreases the rate of photosynthesis.
Respiration is a cellular process to obtain chemical energy from
the oxidation of organic molecules.
the oxidation of water.
the oxidation of plant tissues.
the oxidation soil nutrients.
Då VPD ökar blir assimilationen långsammare eftersom växten tillsluter sina klyvöppningar.