What is the net assimilation rate?
A USEFUL measure of the photosynthetic efficiency of plants is ‘net assimilation rate’ (E) defined by Gregory1 as the rate of increase of dry weight (W) per unit of leaf area (L); that is: In measuring W the plant is destroyed, so changes in W can be determined only by successive sampling from a population of plants.
How do you calculate net assimilation in plants?
It is synonymous with the term net assimilation rate. The usual symbol is E: the rate of dry weight production expressed per unit of total leaf area, LA. Its dimensions are mass per area per time, typically mg mm−2 day−1 or g m−2 day−1. Instantaneously, E = (1/LA) (dW/dt).
What does net assimilation mean?
a measurement of plant growth (weight increase per unit time) by assessing change in a particular part of the plant (usually leaf area) rather than in the overall plant.
What is assimilation in photosynthesis?
Examples of biological assimilation Photosynthesis, a process whereby carbon dioxide and water are transformed into a number of organic molecules in plant cells. Nitrogen fixation from the soil into organic molecules by symbiotic bacteria which live in the roots of certain plants, such as Leguminosae.
How do you calculate assimilation?
3.3 Assimilation The assimilated portion of food ingested is that which is absorbed through the gut wall and taken up into the animal’s tissues, with the rest of the food egested as feces. The assimilation efficiency (AE) = (I−E)/I × 100%, where I is the ingestion rate and E is the egestion (defecation) rate.
What is CO2 assimilation rate?
Net CO2 assimilation rate (A) as a function of intercellular CO2 concentration (Ci). Numbers indicate the three incident irradiances (Iinc) under which measurements were carried out (in μmol m−2 s−1).
What is the assimilation process?
assimilation, in anthropology and sociology, the process whereby individuals or groups of differing ethnic heritage are absorbed into the dominant culture of a society.
What is carbon dioxide assimilation rate?
The assimilation rate (A) is expressed as amount of CO2 assimilated per unit leaf area and time (mol m−2 s−1). From: Techniques in Bioproductivity and Photosynthesis (Second Edition), 1985.
How do you calculate net productivity?
To calculate NPP, you take the total amount of carbon that the plant fixes (or turns into usable material) and subtract the amount of carbon lost during respiration. The total amount of carbon taken in by the plant is known as the gross primary productivity (GPP), and the amount of respiration is known as Ra.
What determines assimilation efficiency?
Assimilation efficiency is the percentage of food energy taken into the guts of consumers in a trophic compartment (In) that is assimilated across the gut wall (A„) and becomes available for incorporation into growth or to do work. The remainder is lost as feces and enters the base of the decomposer system.
What is total assimilation?
From Glottopedia. An assimilation is total assimilation if the assimilated sound adopts all the phonetic features of another sound and becomes identical to it (e.g. Latin septem ‘seven’ > Italian sette).
How is carbon assimilation measured?
‘ The assimilation could also be measured by estimating the increase of carbon content of the leaf, but what is more usually done is to measure the increase of dry weight of the leaf and assume that this is proportional to the increase in carbon content.
