Biomass growth phosphorus

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. 

In many organisms, the addition of P, to a culture previously deprived of phosphorus results in a rapid accumulation of PolyP to an extent many times exceeding the level which is characteristic of normal growth on a complete medium. This phenomenon is called hypercompensation or phosphate overplus . In E. coli, this effect was not found. The addition of P to a starved culture resulted in a rapid restoration of biomass accumulation. 

Increased riverine NO( concentrations due to human activity (see below) mean that DIP is now the main limiting nutrient for plant growth in many freshwaters. The consequent relationship between DIP and chlorophyll levels (a measure of algal biomass) (Fig. 5.11) makes the management of phosphorus inputs to rivers and lakes very important. In some areas DIP inputs are consequently stringently... 

Responses of terrestrial ecosystems to increased atmospheric carbon dioxide concentration are of great current interest. Part of this debate relates to the role of limitation by various nutrients, like nitrogen, phosphorus and other vital nutrients on growth and biomass accumulation in terrestrial vegetation. Because vegetation must maintain a nutritional balance, it is expected that nutrient limitation will constrain responses to increased CO2 level. 

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