Written Paper

Evaluation of silicon-containing minerals effectiveness for field crops cultivation  [2017]

Varlamova, L.D. Bakharev, A.V. Sergeev, V.V., Nizhnij Novgorod State Agricultural Academy (Russian Federation)

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Silicon-containing minerals are often used for the rehabilitation of polluted soils and as an additional source of silicon nutrition for plants. The studies were conducted in the vegetation area of the Nizhny Novgorod region in 2010-2013. The influences of zeolite, diatomite and bentonite clay during the use of nitrogen-potassium fertilizers on a light gray forest soil put in the Mitscherlich vessels (7 kg) were compared. When studying the diatomite experimental crops were corn (direct effect) and mustard (aftereffect), when evaluating the efficiency of zeolite and bentonite clay – spring wheat (direct effect) and oats (aftereffect). Diatomite at a dose of 2 g/kg in average for 3 years increased the yield of green mass of corn by 5.4% (from 719 to 758 g/vessel) with maximum effect in 2010 (7.6%), and the yield of mustard as the aftereffect increased by 26.7% (from 37.1 to 47.0 g/vessel). Also there were increased levels of nitrogen, phosphorus and potassium (NPK) by 7-12% and silicon - by 1.3-1.6 times in the products. Application of different doses of zeolite and bentonite clay (2.6; 5.2 and 7.8 g/kg) during the use of complete mineral fertilizer increased the yield of experimental crops both as the direct effect and aftereffect. On average for years of research the zeolite increased grain yield of spring wheat by 35%, of oats – by 44%, for bentonite clay these figures were 20% and 33% respectively. Overall, the most significant gain from zeolite was obta
ined by using the maximum dose, but from bentonite clay - the minimum one, although in some years there was no direct dependence between the dose of minerals and crop yields. The use of minerals in the tested doses had an ambiguous effect on the accumulation of NPK in the products.