Articles

In closed soil conditions on tomato, cucumber and pepper cultures, the effectiveness of the integrated use of chicken compost, silicon fertilizer based on diatomite and the microbial preparation of the Bacillus amyloliquefasciens culture was evaluated. New technology allows you to get a crop increase of all high-quality vegetable crops. The studied agrochemical properties of gray forest medium loamy soil after harvesting did not deteriorate. In contrast to experiment options using traditional mineral fertilizers, the collected products fall under the definition of “organic” or with improved quality indicators, the so-called “green”. The resources of raw materials for the creation of nature-like innovative technologies of “green agrochemistry” are calculated. Now Russia produces about 310 million tons of organic animal waste, less than 70 million tons or 23% is used. The total content of only three plant nutrient elements (NPK) in the organic matter is 2,9 million tons of active substance. Their cost at current prices for mineral fertilizers exceeds 70 billion rubles. Perhaps the full useful use of organic resources in the system of measures for the “revitalization” of rural territories in terms of maintaining soil fertility and preventing “decarbonization”. This will reduce the negative impact of uncontrolled turnover of nitrogen and carboncontaining products on the components of the environment.

The composition of water-soluble organic matter (WSOM) of coniferous-deciduous, coniferous and moss litter was studied. Type of decay affects the composition of WSOM. Sphagnum litter contains less N and dissolved organic carbon (DOC), but more carbohydrates, the WSOM is characterized the lowest extinction coefficients Е₂₅₄. WSOM from mixed litter with a predominance of birch litter has a maximum content of N and a small amount of soluble phenolic (SP) substances. WSOM from litter of pine needles differ from the rest with a lower content of carbohydrates, the maximum amount of SP and hydrophobic fraction. All investigated WSOM are characterized by high rates of decomposition: half-decomposition time of their stable fractions is 2-4 months. WSOM from pine litter at pH ~ 6 are absorbed by the BF horizon of Podzol, since the concentration of DOC of 100 mg/l. Substances from birch-spruce litter in similar conditions adsorbed slightly.

Based on publications on the soils of the Northwest Pacific, particularly wide effect of climatic factor on soil formation associated with the influence of the ocean has been established. Together with the amount of liquid atmospheric precipitation, the regime and the intensity of their precipitation play an important role. Heat supply is determined not only by insolation, but also by the wind regime, as well as the presence of warm and cold currents. The scale of the pulsed contribution of sea water salts with sediments is related to the distance to the coastline. In additions, the ornithogenic factor acts on small islands. All this creates variants of soil formation specificity on the characterized islands.

Research of soil cover heterogeneity of Khibiny mountains within the Polar-Alpine Botanical Garden was carried out. Podzols and podburs occupy larger area in the garden (90%). Human-transformed soils are widely spread in the areas disturbed during the construction and introduction of plants. The soils of the garden are in the zone of influence of apatite-nepheline factories and metallurgical plants. As a result, in upper horizons there is a high content of some heavy metals and metalloids such as Ni, Cu, Pb, As, Zn, V, Sr.

We conducted soil zoological studies on the Southern coast of Crimea in the Nikitsky botanical garden and in the natural reserve “Cape Martian”. We found 22 taxonomic groups of large invertebrate soil animals, whose number was up to 1000 spec/m², and biomass - up to 25 g/m², in the artificial stratozems of the garden and in the natural red-colored soils of the reserve. The territory of the Nikitsky garden is characterized by a greater biomass and taxonomic diversity of the soil macrofauna than Cape Martian, but the structure of the communities of the two territories have similarities. Higher biodiversity and biomass in the garden are explained by increased soil moisture due to sprinkling and the mosaic distribution of vegetation in the arboretum. Both territories are characterized by a large internal heterogeneity of the soil population, which is due to the variability of soil properties, which is determined by the differences in the artificial soils of the Nikitsky garden and the gulley erosion of the soils of Cape Martian. These factors, together with the diversity of vegetation cover, affect the heterogeneity of the macrofauna distribution and provide high biological b-diversity of the territory.

The article considers agrochemical factors for cultivation of medicinal plants with focus on biomass increase primarily due to a role of nitrogen and zinc and change in the fractional composition and concentration of carotenoids in Calendula officinalis L. A two-year vegetative experiment with calendula of Kalta variety was carried out. Effects of Zn and Zn supplemented with N intake on morphological changes, blooming and reproduction were studied. Intake of nutrients into above-ground plant parts was studied utilizing a variety of chemical methods. The quantitative and qualitative composition of carotenoids by HPLC was established. The calculated value of the accumulation of carotenoids by plants for the entire vegetation period was performed. Data were subjected to analysis of variance (ANOVA) and means were separated by Duncan multiple range test at P < 0,05 significant level. Factors selected by us in the growing experiment, formed contrasting options which allowed to determine the most effective way to grow medicinal crops on chernozem soil.

The mineralogical composition of fraction of more then 0,1 mm of podzolic soils of the Kostroma region was studied. One of the debatable versions of finding the boundary between the glacial deposits of the Moscow and Dnieper ages is confirmed. Signs of destructions of minerals are established, this indicates the role of this process in providing mineral elements of the subsurface, which formed on weathered glacial deposits.

The study of the mineralogical composition of sand (0,25-0,05 mm) and coarse silt (0,05-0,01 mm) fractions revealed a significant lithological heterogeneity of soil forming material on the territory of the Zvenigorod biostation. The predominance of ore minerals in the heavy fractions (up to 42% of the grains) and, to a lesser extent, hornblende and biotite, explains the ironing (significant presence of iron oxides, hydroxides) of the profiles and the brown color of sandy loam soils. This feature, along with the insignificant presence of the clay fraction, admit us to classify texturally undifferentiated soils as ferric-metamorphic soils, and more differentiated - as eluvial soils.

The composition of water extracts of the soil, litter and land litter was studied for the conditions of the nesting places of the gray heron and the control plots in the zone of distribution of gray forest soils of the broad-leaved ecosystems of the Tula area. It has been established that the entry of bird excreta leads to an almost universal degradation of land cover, the formation of specific litters, with a significant influx of large tree litter, which is associated with the nest building process. It is shown that the upper horizons of gray forest soil, litter and litter in nesting conditions are characterized by an increased content of such elements as calcium, potassium and magnesium, and among trace elements - copper, zinc and strontium. Among the anions in the soils and litters of bird nesting sites, an increase in the content of nitrates, phosphates and chlorine was found.