The role of oil radish root biomass in the formation of its potential green manure productivity
Abstract
The aim of the research was to establish the peculiarities of formation of bioproductivity of oil radish root system from the position of total weight and spatial weight parameters within the soil profile as additional parameters for establishing its green manure potential in spring and summer sowing. Methods. The study was conducted during 2014–2024 on the experimental field of Vinnytsia NAU on gray forest soils with medium fertility potential. The experiment was replicated four times. The placement of the variants is systematic in two tiers. The experiment involved the study of two green manure options – summer green manure with spring sowing and autumn green manure with summer sowing – of such parameters as: bioproductivity of the root system in total wet and dry matter, root length density (RLD), root mass density (RMD), specific root length (SRL, m/g) and percentage of root mass distribution in the soil profile (PRWD). Results. The levels of bioproductivity of root biomass formation at two basic terms of sowing oil radish as a green manure were determined. The structure of weight distribution of the root system in the context of a meter soil profile with a technological step of 10 cm was analyzed with full detailing of the nature of the spatial morphometry of the root system in the vertical and radial directions of the profile. The long-term dynamics of the formation of such morphometric and morpho-weight characteristics of the root system as: root length density, root mass density, specific root length, percentage of root mass distribution in the soil profile was determined by the depth of the profile. The participation of the root system in the formation of its sideration potential of oil radish in the share of the formed root mass as an additional component of bioorganic fertilization systems was proved. Conclusions. It has been proved that the root system of oil radish, both in terms of bioproductivity and adaptability in terms of the formation of its spatial morphometry and the proportion of presence in different horizons of the total meter soil profile in comparison with other traditional cruciferous green manure crops, forms a positive morphotype that guarantees the active interaction of the rhizosphere of the four-level organization structure with the soil profile 60–80 cm deep during spring and 40–60 cm during summer sowing of green manure. On the basis of this, oil radish should be attributed to the group of potentially effective green manure crops suitable for bioorganic green manure systems with an active influence on the systemic agrophysical parameters of the soil profile.
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