Institute of Animal Science

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Author: search.filters.author.Golubinova IrenaLanguage: search.filters.language.English (United States)

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    Effect of Vegetative Application of Herbicides on the Quality of Silage from Sorghum vulgare var. technicum [Körn.]
    (Research Institute of Mountain Stockbreeding and Agriculture, 2022-12)
    Golubinova Irena
    ;
    Marinov-Serafimov Plamen
    ;
    Gjorgovska Natasha
    ;
    Levkov Vesna
    On the basis of field experiments carried out during the period 2017 - 2020 in the experimental field of the Institute of Forage Crops –- Pleven, Republic of Bulgaria to establish the phytotoxic effect of a group of herbicides for postemergence application in broomcorn and the biochemical analysis carried out at the Institute of Animal Science, Skopje, Republic of North Macedonia, a comprehensive assessment of the influence of herbicide selectivity on the quality of broomcorn silage was made. It was found that the physico-biochemical parameters (dry matter content, pH, lactic acid, and butyric acid) in the forage mass are directly related to the fermentation parameters and the quality of the broomcorn silage and are significantly influenced by the selectivity of the herbicides at the culture. Obtaining silage from broomcorn with good silage qualities can be ensured by using above-ground fresh biomass from the crop with an established phytotoxic effect of no higher than 2.5 score as a result of the application of vegetation herbicides. The silage of above-ground biomass from broomcorn in the growth stage BBCH - 47 with established moderate-strong (EWRS - 4.5 score) to strong phytotoxicity (EWRS - 8.5 score) when applying herbicides, deteriorates the quality of the silage as a result of lowering the content of dry matter and compensatory processes related to reducing the content of lactic acid and increasing the share of acetic and butyric acids.
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    Influence of Pre-Sowing Treatment of Seeds with Siliplant on Initial Growth of Alfalfa (Medicago sativa L.) Cultivars
    (Research Institute of Mountain Stockbreeding and Agriculture, Troyan, 2022-12)
    Marinov-Serafimov Plamen
    ;
    Golubinova Irena
    ;
    Cvetanova Galja
    ;
    Levkov Vesna
    ;
    Gjorgovska Natasha
    During the period 2021–2022 in the Institute of Forage Crops - Pleven was established the influence of pre-sowing treatment (priming) of seeds with Siliplant under laboratory conditions on the initial development of three varieties of alfalfa grown by conventional ("Dara" and "Pleven 6") and SP5A001 biological method. Laboratory seed germination and primary plant development in vitro conditions and their response were evaluated using the complex plant growth index (GI) of the cultivars included in the study. It was established that the recommended working concentration for pre-sowing treatment of alfalfa seeds with Siliplant for field conditions is in the range of 0.5÷0.6%, determining a complex stimulating effect on the growth of the root, epicotyl, and seedling, respectively and on the initial development of alfalfa in the "sowing-emergence" period. By means of polynomial regression analysis, equivalence was established between stimulating and/or depressing effect on seedling growth as a result of the pre-sowing treatment of alfalfa seeds with Siliplant, expressed by the plant development index (GI).