Formation of steadily productive annual mixed sowings based on optimization of mineral nutrition

УДК 633.352.1+633.162+633.13:631.81(470.331)

Complex researches have been conducted in the Tver region on sod medium podzolic sandy loam well-cultivated soil. We have studied implementation of crop yield programmable levels by means of vetch-barley-oats mixtures different in composition. The advantage of their cultivation on grain-and-hay has been revealed, when the program both at the background of 2.5 thous. feed unit /ha and 5.0 thous. feed unit /ha on all variants of mixed crops was exceeded. Program has been carried out only at the programming level on 2.5 thous. feed unit / ha when growing mixtures for grain. The vetch-barley-oats mixtures have the biggest response to mineral fertilizers when programming. The mixtures had a ratio: at cultivation on grain-and-hay 20 % : 40 % : 60 % (on the background 2.5 thous. feed unit /ha) and 40 % : 60 % : 20 % (on the background 5.0 thous. feed unit /ha), for grain 40 % : 40 % : 40 % (on both backgrounds). Foliar application by microbiological fertilizer Baikal EM1 in the tillering phase of Poaceae components has increased the percentage of program implementation, regardless on a kind of received production, as well as it has increased collecting of digestible protein and output of exchange energy. The positive effect from the calculated doses of mineral fertilizers and spraying by Baikal EM1 has been achieved by improving the indicators of photosynthetic activity (leaf area, photosynthetic potential of seeding, net photosynthetic productivity, efficiency of photosynthetic active radiation) and the direction of the productional process on yield.

Desk02 theme