Журнал "Проблемы агрохимии и экологии"

In microplot field experiment on soddy-podzolic medium loamy soil the effect of diatomaceous earth of the Novoaybesinsk deposit field (in the doze 700 kg/ha) and mineral fertilizer (60 and 100 kg active ingredients per ha) on grain yield of barley (Hordeum vulgare L.) variety Moscow-3 and features of the metabolism of nitrogen and phosphorus in plants were studied. It was shown that aybecit manifested the efficiency only at high levels of nitrogen-potassium nutrition: the difference in barley productivity in the variants with nitrogen and phosphorus application without the use of aybecit and in the case of its use was 32-38%. Aybesit did not influence significantly nitrogen and phosphorus content in the variants with application of phosphate fertilizers on the background of the NK ferilizers. It was established that aybesit increased the protein N/nonprotein N ratio in barley plants at the tillering stage at entering nitrogen-potash fertilizers and complete fertilizer (NPK). The aybecit use may be expedient for soddy-podzolic soils poorly provided with phosphorus, at the sufficient level of nitrogen-potassium nutrition.