THE EFFECT OF DIATOMITE, ZEOLITE AND BENTONITE CLAY ON THE EXCHANGE ACIDITY AND NUTRIENT REGIME OF SODPODZOLIC SOILAndrey Vladimirovich Kozlov, Irina Pavlovna Uromova, Natalia Nikolaevna Koposova, Yuliya Yurevna Davydova and Marina Aleksandrovna Trushkova
The paper considers the results of the changes in the sod-podzolic light loamy soils of the Borsky District of the Nizhny Novgorod Region in terms of the content of active forms of fertilizer elements (phosphorus, potassium, silicon) and changes in its metabolic acidity, which occur under the effect of three high-silicon rocks diatomite of the Inzenskoe deposit, zeolite of the Khotynets deposit, and bentonite clay of the Zyryansky deposit, including those combined with the action of NPK-compounds. With regard to the soil exchange acidity index, it was established that the most effective is the dose of 12 t/ha of diatomite, as well as 6 t/ha of zeolite and bentonite clay. The content of active phosphates in the soil increases at similar doses by 43-46%, 33-35% and 37-39%, respectively, relative to the control and NPK background. The content of potassium exchangeable compounds in the soil also increases by 29-37%, 24-27% and 18-21%, respectively, relative to the control and NPK background. The positive effect of siliceous rocks has also been established with regard to the content of active silicon compounds in the soil, and to a greater extent to the content of acid-soluble compounds.
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