Nutrient Balance of Phosphorus in Long-Term Field Experiment

Phosphorus is a major nutrient for plants and the determination of available phosphorus in soil is necessary for agricultural practices. Phosphorus balance in soil was assessed in the long-term stationary experiment at Hněvčeves from 1980 to 2015. The results indicate that the phosphorus balance was significantly influenced by the doses of phosphorus in mineral fertilization and farmyard manure. The most well balanced balance of phosphorus in soil was achieved at the plots with low doses of phosphorus applied in mineral fertilization and farmyard manure. Negative phosphorus balance was found out in the combination without the dose of phosphorus in both fertilizers. On the contrary, phosphorus surplus was indicate in the combination with very high level of phosphorus dose in mineral fertilization and medium level of phosphorus dose in farmyard manure or in the combination with medium level of phosphorus in mineral fertilization and very high level of phosphorus in farmyard manure. Very high positive correlation of phosphorus contents were found in plants to yield. Data about phosphorus balance can help to modify phosphorus fertilization doses for subsequent crops and optimize production inputs.