Share |

Plant Requirement and Zero Balance Soil P Development under Two P Input Scenarios in Finland

Phosphorus (P) loading to watercourses is clearly related to soil P status (STP), which has more than doubled in Finland since 1950s due to positive P balances. The current P fertilization is still higher than required for the maximum yield. Changes in STP and P use during the next 20 years were predicted with two P fertilization scenarios: biological optimum P use (resulting in 95% of the maximum yield of cereals and grasses) and zero-balance (fertilization equal to P in harvested crop). Calculations were made for the whole country and four regions along the Baltic Sea coast.

Due to decreasing STP values, successive P fertilization according to the biological optimum or the zero-balance would, respectively, result in 42% or 38% lower dissolved P losses after 20 years. If plants were fertilized according to the biological optimum, about 143 million kg P would be saved in 20 years in Finland compared to the present P use. In some regions, by continuing the present manure production, manure P would alone meet the 20-year requirements.

This report on two P fertilization scenarios in Finland was prepared as part of the work package 4 on manure standards in the project Baltic Manure.

Click here to read the report


If you have any comments, ideas or suggestions in relation to the content on this site, please write a message in the contact form below.

First Name
Last Name
Enter the letters shown above