Biomass growth nitrogen

Nutrient release into the environment is rapid in nutrient-rich wetlands (eutrophic wetlands) where nutrient supply meets the needs of microbial growth. Nitrogen and phosphorus release is directly related to the decomposition end products methane and carbon dioxide (Figure 5.65). In contrast, nutrients may be held tightly within the microbial biomass component of low-nutrient wetlands. 

Alkaloids as biological fertilizers are natural plant products and a part of plant nitrogen and carbon economy. Recent studies report that nitrogen but not on the alkaloid content influences plant biomass growth and primary... 

Scriber, J. M. (1978a) The effects of larval feeding specialization and plant growth form upon the consumption and utilization of plant biomass and nitrogen an ecological consideration. Ent. exp. appl., 24, 694-710. 

Biomass growth can also be determined by measuring the cell or mycelia component that is not present in solid substrate. Protein content of the biomass can be measured by determining the nitrogen content by the Kjeldahl method. Accurate measurement of biomass can be obtained using an amino acid analyzer. This method of biomass measurement is reliable if the solid substrate has no protein content. 

In these equations, [L = specific growth rate coefficient, v = specific rate of substrate uptake, t = time, x = biomass concentration, Sj = intracellular substrate, and Cj = concentration of intracellular substrate. Several examples where these equations can be applied include nitrogen hmitations in M. citrifolia cultures and phosphate hmited growth in C. roseus, N. tahacum, a.nd Papaver. somniferum. 

A bacterium is grown aerobically with glucose as sole source of carbon and ammonium ions as nitrogen source. Experimental analysis shows that six moles of glucose are utilised for each mole of biomass produced. Write the reaction equation for growth if the elemental composition of the cells is CHi,666 CW Nojd. 

Aim3 aerobic bioprocess was operated in a continuous mode with nitrogen as the growth limiting nutrient. The steady state biomass concentration (x), the biomass yield coefficient (Yx/S) and the product yield coefficient (Yp/t) were determined at a low and at a high dilution rate (D). 

In addition to a complete water balance, EPIC estimates plant biomass production, fertilizer use, wind and water erosion, loss of nitrogen and phosphorus from the soil, and the effect of nutrient loss from the soil on plant growth. 

The amount of nitrogen in the biomass of the Oak Forest ecosystem reaches 900-1,200 kg/ha and the sum of ash elements is about 2,000-3,000 kg/ha, e.g., greatly in excess of nitrogen. The corresponding values for accumulation of nitrogen in annual growth are 80-100 and for ash elements, 200-250 kg/ha. An essential point is that the green leaves store 70-80% of the mass of uptaken elements, and the fallen leaves,... 

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