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The pin-point method (or point-intercept method) is used for non-destructive measurements of plant cover and plant biomass. [1] [2] In a pin-point analysis, a frame (or a transect) with a fixed grid pattern is placed above the vegetation. A pin is inserted vertically through one of the grid points into the vegetation and will typically touch a ...
Biomass partitioning is the process by which plants divide their energy among their leaves, stems, roots, and reproductive parts.These four main components of the plant have important morphological roles: leaves take in CO 2 and energy from the sun to create carbon compounds, stems grow above competitors to reach sunlight, roots absorb water and mineral nutrients from the soil while anchoring ...
Changes in plant species in the terrestrial ecosystem can result in changes in the biomass of soil decomposer communities. [13] Biomass in C 3 and C 4 plant species can change in response to altered concentrations of CO 2. [14] C 3 plant species have been observed to increase in biomass in response to increasing concentrations of CO 2 of up to ...
A next level of analysis is to measure the growth allocation: what is the increase in total biomass of a plant, and to what extent is the increase due to growth of leaves, of stems and of roots. In young plants, growth allocation is often quite similar to the actual biomass allocation.
Equations used to describe plant size over time are then often expolinear [15] or sigmoidal. [16] [17] Agronomic studies often focus on the above-ground part of plant biomass, and consider crop growth rates rather than individual plant growth rates. Nonetheless there is a strong corollary between the two approaches.
Stem profile measurement Electronic equipment (as Field-Map for example) is used for stem profile measurements and for measurements of profiles/projections of the crown. These key measurements are used for estimation of carbon sequestered in the plants.
Because an increased biomass implies higher respiration per surface unit and a limited increase in intercepted light, crop growth is a sigmoid function of crop biomass. Plant production distribution – Usually only a fraction of the total plant biomass consists of useful products, e.g. the seeds in pulses and cereals, the tubers in potato and ...
Today, C 4 plants represent about 5% of Earth's plant biomass and 3% of its known plant species. [18] [25] Despite this scarcity, they account for about 23% of terrestrial carbon fixation. [26] [27] Increasing the proportion of C 4 plants on earth could assist biosequestration of CO 2 and represent an important climate change avoidance strategy.