Эффективность минеральных удобрений на посевах ячменя в зависимости от обеспеченности почв подвижным фосфором
2012
Leonov, F.N. | Sinevich, T.G., Grodno State Agrarian Univ. (Belarus)
In the conditions of the Republic of Belarus there were presented results of three-year studies of the efficiency of phosphorous fertilizers for spring barley (Hordeum vulgare) growing on cultivated sod-podzolic gley light loamy soils with different degree of mobile phosphor content. Research results showed that the optimum dose of phosphorus fertilizers to ensure high yield and agronomic efficiency for the sixth experimental soil group was marked in case of soil supply with mobile phosphates at the rate of 40 kg/ha, for the fourth - on the basis of soil supply with 60 kg P2O5/ha. The marked application rates of phosphorus fertilizers also provided the maximum yield of crude protein per 1 hectare of arable land. With the increase of phosphorous load in case of increasing of doses of applied phosphorous there was marked lowering of crude protein in barley grain from 10.6% (in case of P20) up to 10.1% (in case of P100). At the same time, in soil with the content of mobile phosphates at a level of 184 mg/kg, the application of phosphoric fertilizers has provided increase in the given parameter from 10.9% (at Р20) up to 11.3% (at Р60).
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