Influence of humic preparations on the content of carbohydrates in structural units and their water resistance

Abstract

The effect of the combined use of humic preparations and pesticides in various dosages on the quantitative composition of carbohydrates in agronomically valuable soil aggregates was studied. Biologically active humic substances indirectly, through plants and microorganisms, intensify the release of sugars, which play an essential role in the initial stages of the soil aggregates formation. Pesticides have a depressing effect on the soil microflora development, which, in turn, is one of the factors of the agronomically valuable soil structure formation. The introduction of humic preparations reduces the toxic effect of pesticides and reduces seasonal deterioration in the structural state of the soil. It has been shown that the distribution of aggregates according to variants, both in the case of dry sieving and in the case of wet sieving, correlates with the dynamics of the carbohydrate content in soil particles. This tendency is especially perceptible in the variants where pesticides were introduced into the soil together with the humic preparation. The correlation between the distribution of soil aggregates and carbohydrates according to Chaddock’s scale is salient (r = 0.532). The introduction of humic preparations makes it possible to reduce the loss of the agronomically valuable structure even in aftereffect.

Dynamics of the structural state and enzymatic activity of calcic chernozem under the influence of biologically active drugs

“…The use of biostimulants based on humic acids has proven itself to increase the productivity of crops, its resistance to adverse weather conditions and increased doses of pesticides. A number of researchers note the positive effect of these preparations on the agrophysical and microbiological properties of the soil: the quality of the agronomically valuable structure improves, the proportion of water-resistant aggregates increases, and the growth of ammonifiers and aminoautotrophic groups of microorganisms is noted [11,12,13]. Despite the ambiguity of the results of the use of biostimulants, the production, range and market for its use is increasing annually, which, given the environmental friendliness of these drugs, allows us to consider them a universal tool for solving many problems of agro-industrial production [14,15].…”

Effect of application of plant protection agents and a biologically active preparation on agrophysical properties of ordinary carbonate chernozem in stationary experiment

“…Согласно многочисленным исследованиям, гуминовые вещества влияют на образование почвенной структуры. Наиболее заметно данная особенность прослеживается в почве, содержащей высокие концентрации кальция, при значениях реакции среды, близкой к нейтральной, так как эти условия необходимы для связывания механических частиц почвы при помощи органоминеральных мостиков между микроагрегатами [3,4]. Отбор растительных образцов с определением показателей качества проводили согласно методике ЦИНАО.…”