Question

how to calculate the biomass of a tree:
maintenance respiration and growth respiration

Answer 1

Answer

Calculation of biomass of trees-

• Carbon accumulation is the primary process for plant biomass production, and depends both on photosynthesis and respiration. But respiration is very im- portant in the overall carbon balance of plants .
• Growth respiration is defined as the amount of carbohydrates respired in processes that result in a net gain in plant biomass. This includes the production of ATP and reductant for biosynthetic processes, transport processes, and nutrient uptake and reduction.
• Maintenance respiration is defined as the respiration needed to provide the energy for all plant processes that do not result in a net increasein plant dry matter, such as maintenance of ion gradients across membranes and the resynthesis of degraded organic compound.

• Growth respiration can be used to calculate the conversion efficiency ,the amount of plant dry matter (g) produced from 1 g of glucose], while Rm is used to determine the maintenance coefficient of the amount of glucose respired for maintenance per unitdry weight (DW).

• Both the conversion efficiency and the maintenance coefficient are important parameters in crop growth models

• it is normally assumed that Rg is proportional to the growth rate of the plants, while Rm is proportional to the DW of the plant.

• Growth and maintenance respiration were estimated based on the assumption that they are functions of DCG(daily carbon gain )and CCG(cumulative carbon gain ).