Plant nutrients Plant growth requires various nutrients Major nutrient elements: CI N, P. trace elements: S, Si, Cl, I, and metallic elements(Fe, Mn, Cu, etc) The minor elements because of the low demand can usually be supplied at adequate rates in natural waters The required proportion of the major nutrient elements isC∴N:P=106:16:1 C despite the largest demand is plentifully supplied to phytoplanktons from CO2 in the atmospherePlant nutrients • Plant growth requires various nutrients. – Major nutrient elements: C, N, P. – trace elements: S, Si, Cl, I, and metallic elements (Fe, Mn, Cu, etc). • The minor elements, because of the low demand, can usually be supplied at adequate rates in natural waters. • The required proportion of the major nutrient elements is C:N:P=106:16:1. • C, despite the largest demand, is plentifully supplied to phytoplanktons from CO2 in the atmosphere