The effect of the use of a soil improver based on waste brown coal on the enzymatic activity of soil in the cultivation of Paulownia hybrids (Paulownia Siebold & Zuccarini, 1835)

The effect of the use of a soil improver based on waste brown coal on the enzymatic activity of soil in the cultivation of Paulownia hybrids (Paulownia Siebold & Zuccarini, 1835). An important element in controlling the condition of the soil and the plants grown on it are tests of the enzymatic activity of the soil matrix. One of the greatest advantages of using enzyme tests is the ability to make an assessment that also includes other non-measurable factors that affect soil health and condition. The diagnosed changes in soil enzymatic activity are the best parameter for determining the biochemical processes taking place there. This article describes the enzymatic activity of lessive soils on which the Paulownia hybrid variety is cultivated and a soil improver based on waste brown coal is used

Change of gydrolase and oxide reductase fermental complex activity and indicators of fertility to sod-podsolic soil under action of bentonite clay

In aspect of modern direction of potential impact assessment of alternative fertilizer materials on properties of soils variability of activity of the main gydrolase and oxide reductase enzymes in sod-podsolic sandy loamy soil (by WRB Retisols) and indicators of its effective fertility under influence of meliorative doses of bentonite clay is determined. Microfield research was conducted during 2015–2017 in conditions of the Nizhny Novgorod Region. Breed was brought once (2014) in an arable layer of earth in doses at rate of 3, 6 and 12 t/hectare. In years of carrying out research grew up winter wheat (Moskovskaya 39), barley (Veles) and peas of sowing campaign (Chishminsky 95). When determining enzymatic activity of soil and maintenance of batteries of plants in it used classical biochemical and agrochemical methods used in soil science. Under influence of bentonite clay high doses in soil observed considerable activization of enzymatic activity (protease (to 90%), cellulase (almost twice), phosphatase (up to 140%), phenol oxidase (up to 30%) and catalase (up to 70%)). As result, improvement of its agrochemical indicators is revealed, including increase in content of mobile compounds of phosphorus (on 21–31 mg/kg), exchange forms of potassium (on 32–41 mg/kg), available silicates (by 2–8 times in α-form and at 1,5–3,0 time in β-form), strengthening of nitrifying ability (on 2,6–4,1 mg/kg) and also relative persistence of maintenance of humic substances at level of control is established. Received results can be basis for introduction of bentonite in production field experiments and in subsequent for development of technology of bentonite clays use in agriculture of the Non-chernozem zone as meliorative substance, optimizing enzymatic activity of soils.