Bilanțul elementelor nutritive la aplicarea deșeurilor locale organogene pe cernoziom levigat

Abstract

The article presents the balance of nitrogen, phosphorus and potassium when applying different types and doses of farmyard manure and sewage sludge on leached chernozem for five crops (winter wheat, winter barley, grain corn, sunflower and grain peas). The calculation of nutrient element balance was performed based on the research carried out in the period 2011-2020 in the Laboratory of Soil Agrochemistry and Plant Nutrition (Institute of Pedology, Agrochemistry and Soil Protection “Nicolae Dimo”). A negative balance of biophilic ele-ments was established in the control unfertilized variant regardless of the cultivated crop. In the fertilized variants the nitrogen balance was positive under green peas and sunflower and deficient under spiked cereals and corn. Phosphorus balance was positive under all crops when applying twice the dose of manure, while potassium ba-lance has positive values for all crops, except corn. At the experimental field level, a deficient balance of nitrogen and a positive balance of phosphorus and potassium were established.

Keywords

• agricultural crops
• farmyard manure
• sewage sludge
• soil
• balance
• nitrogen
• phosphorus
• potassium