Scientific Journal of KubSAU

The article shows prospects of the use of growth regulators on the nature of humic culture of rice in the first place due to the low field germination of seeds, rice crops lodging. Effect of humate on the growth, development and photosynthetic activity of plants, as well as the consumption of nitrogen, phosphorus and potassium results in increased grain yield of rice. Depending on the type of humate yield increased by 5,0-6,4 с/ha. Seed treatment caused a change humates biochemical and technological indicators of the quality of grain. Beans with these options contain more than in the control of protein per 0,13-0,44 % starch - 0,36-1,2 %, decreased membranous grain by 0,2 % and 1 % fracture, raised on vitreousness 1,46-2,0% and the yield of cereals on 1,06-2,0 %

Based on obtained experimental investigations it is shown that microelements included into winter wheat fertilization system positively influence plants mineral nutrition, quantity and quality of the crop

In the article we show the history of opening of selenium, its distribution in the nature, the value of this microcell in life of plants. We also show the experience of russian and foreign scientists on studying of the influence of selenic fertilizers on a crop and quality of crops

The article presents the effect of boron fertilizer on growth, development and productivity of rice plants, the optimal dose and timing of application of boron fertilizers, providing maximum increase grain yield, calculated the economic loss of nitrogen, phosphorus and potassium and crop coefficients of their use of fertilizer plants; we have also established the influence boron fertilizer on grain quality of rice

Great practical and theoretical interest comes with a study of the transformation of calcium agrobiogeochemical in agro-ecosystems. The basis of the stability of the soil, as an element of the structure and functioning of the biosphere, constitutes historically approved biochemical cycles and flows of matter and energy, which remain unchanged under anthropogenic impact. Comparative analysis of the total content of calcium leached black soil allowed us to establish its decline after three rotations of grain and grass-tilled crop rotation. Without the use of fertilizers its reduction from baseline was 5.25% in the layer 0-20 cm and 3.87% in the 20-40 cm layer, with their introduction - 9.14 and 9.35%, respectively. This trend suggests a decrease in calcium reserves in the root zone of leached black soil in its agricultural use; this process is more active when using mineral fertilizers. This is obviously due to a large outflow of elements in the fertilizer background with harvest crops, and partly due to the influence of mineral fertilizers as chemical reagents on mineral soils, resulting in the release of calcium and moving it into the lower soil horizons. Along with the total content of calcium and its forms, we have analyzed the activity of calcium ions and calcium potential

The results of study of groups and forms of iron compounds in leached chernozemic soils of Western Ciscaucasia for three crop rotations according to scheme grain-grass-hoeing are presented. With long-term use of leached black soil in terms of Agrigento there is a substantial change in the contents of the various groups and iron compounds. On the non-fertilized variant of rotation, the total content of this element in the 0-20 cm 21-40 cm soil layer by 69.4 and 66.5% of silicate and by 30.6% and 33.5% free group of compounds of iron. The applied system of fertilizer crop rotation helps reduce the silicate and increase of free group its compounds. In leached black soil a group of desilicated iron in the 0-20 cm layer 24.8 % presents crystallizability and to 75.2% amorphous compounds, 21-40 cm layer, respectively, 26.2 and 73,8 %. Under the influence of fertilizers we have noticed increasing of amorphous and reducing the number of cristallizing forms of the compounds of this element the soil. The number of different groups and forms of iron compounds in leached black soil with systematic use of fertilizers in crop rotation is determined not by the size of introducing this element as impurities, and processes such as the alienation of iron with additional derived products, increase its mobility in the soil due to a shift in the reaction of the soil solution, changes in fractional-group composition of humus. Diagnostic criteria state of iron in the soil are leached quantitative ratio of the content of the various groups and forms of the compounds of this element

Chromium in soils is represented by the following forms of connections: 1) stationary; 2) strongly bound in the composition of primary and partially secondary clay minerals, with one and a half aluminum and iron hydroxides; 3) exchange bound on the surface of one-and-a-half oxides and clay minerals; 4) associated with organic matter of soils; 5) water-soluble compounds. The gross chromium content (70.1-78.3 mg/kg) in leached chernozem is well below clark soils of the world (100 mg/kg). The share of mobile, acid-soluble and acid-insoluble forms of the element compounds is 0.01, respectively; 7.09 and 92.9 % of its gross content. After three rotations of 11-full grain-grass-tillage crop rotation without mineral fertilizers, the chromium content in leached chernozem has not undergone significant changes, even to some extent there is a tendency of its reduction. This indicates the absence of serious natural sources of chromium in the soil. Scientifically-based system of fertilizers for agricultural crops does not lead to anthropogenic pollution of leached chernozem with chromium. The removal of this element with crop yields is compensated by its receipt in the form of ballast with mineral fertilizers

The article studies current state of fertility and productivity of leached chernozem used in the 11-field grain-grass-row crop rotation. Under the conditions of a stationary field experiment, a soil section was laid, a morphological description of the soil was carried out, its magnetic susceptibility χ was measured, soil samples were selected from soil-genetic horizons, in which the particle size distribution, physical and chemical parameters were determined. Studies have shown that leached chernozem is characterized by an addition density of 1.30 g/cm3, a solid phase density of 2.67 g/cm3, a total porosity of 51.9 %, χ = 1,045 × 10-3 units SI, pHwat. 6.5 units, humus content 3.2 %, its stock in the layer A + B = 468.2 t/ha, the sum of the exchange Ca2+ and Mg2+ 42.8 mg.eq./100 g. The use of mineral fertilizers increases the productivity of leached chernozem: the yield of sunflower of 11-field grain-grass-row cultivated crop rotation exceeds the control without fertilizers by 1.02-1.62 t/ha

The efficacy of using "Reasil Universal" multicomponent fertilizers on the rice crops. It is found that the greatest effect for seed treatment before sowing and foliar feeding of plants was reached at a dose of 300 ml/t or ml/ha. This gives better grain yield of rice, respectively, 5, 43 and 5, 79 kg / ha

The article shows results of using a mineral fertilizer system on the conditions of the mineral nutrition of winter wheat grown on leached chernozem in 11-field grain-tilled crop rotation conditions of stationary experience. We have also shown the effect of various norms and types of fertilizers on grain yield. Grain increase as a result of using N40 and N40Р30К20 ranged from 0.54-0.50 t / ha, average and elevated rates increased the yield of winter wheat by 0.97 and 1.03 t / ha, which is higher than the control by 17.1 and 18 , 2%