Dynamics of the Content of Nutrients in Agrochernozem during the Cultivation of Ginger Seed

Abstract

In the field experiment, the food regime of agrochernozem was studied during the cultivation of the seed ginger (Camelina sativa (L.) Crantz) in the conditions of the Kansk forest-steppe of the Krasnoyarsk Territory. The predominant absorption and removal of nitrate nitrogen and exchangeable potassium by the culture determined the low availability of 0–40 cm of mineral nitrogen in the soil layer (5–6 mg/kg) while maintaining an average and very high availability of exchangeable potassium (87–158 mg/kg). It is shown that the largest share of the return to the soil after harvesting the ginger was accounted for by N and P (50–37%). With root and crop residues, nitrogen – 70, phosphorus – 19 and potassium – 51 kg/ha were returned to the soil. Agrochernozems of the Kansk forest-steppe, without additional fertilization, are able to provide a sufficient level of phosphorus and potassium nutrition in ginger crops.