[Effect of mineral fertilizers under spring wheat depending on soil supply by mobile phosphates]
2006
Bogdevich, I.M. | Drozdovskaya, V.A.(The National Academy of Sciences, Minsk (Belarus). Institute for Soil Science and Agrochemistry)
russe. Authentic dependence of a level of grain productivity of spring wheat on dozes of mineral fertilizers at increase of the content in soil of mobile phosphorus is established. The average increase of a grain yield at low content P2O5 (67-72 mg/kg) has made 10,2 c/ha of grain, and at high (388-398 mg/kg) - 20,7 c/ha of grain. The recoupment of 1 kg nitrogen by crop gain considerably increased in process of increase in soil of mobile phosphates content at a variant with a full doze of fertilizers application N110P60K120 c 12,8 (I a level) up to 27.9 (IV level) kg of grain. Phosphoric fertilizers, on the contrary, were most effective in soils with the average and raised content of phosphorus. Their recoupment sharply decreased at high content P2O5 with 9,5 up to 3,8 kg of grain on 1 kg of phosphorus. Efficiency of potash fertilizers also raised in process of increase in the content of mobile phosphates in soil. The greatest increase of a grain yield is received at doze K180 at the fourth level of security by mobile phosphorus. However specific increases of grain on 1 kg, K2O were above at an average doze - K120
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